Off-Grid Solar
Battery Based DIY Kits

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Off-Grid & Grid Interactive Battery Based Packages

off-grid wind solar
  • OutBack Power; MidNite Solar Pre-Engineered Systems.
  • Solar Made Simple. tax creditDIY kits from Micro to Large. Advanced and proven technologies for off-grid and utility grid-tie functionality. Battery based grid interactive or off-grid systems operate from the stored energy in a battery bank. An AC inverter pulls the DC power [Direct Current] from the stored energy in the batteries and converts the electricity into AC power [Alternating Current] to use for your lights, appliances & other home or cabin electrical needs. During the daytime the battery bank is is recharged by the solar panels. At night, the inverter is pulling directly off the batteries. Your solar system has to be sized to support your daily loads and replace the stored energy pulled from the batteries on a daily basis with stored energy reserves large enough to span any "no sun" days. That means the size of your system depends on the "energy budget" you establish and where the system will be located.

Click the Tab Above ⇑ Planning Design & Installation Tips along with the Video Tab to Learn More.

Planning Required for Off-Grid or Grid Interactive Battery Based Systems

The BIG Question You Need to Answer First. Estimate Your Daily Loads.

  • How many watts per day does or will your household consume? The most important challenge in an off-grid system is to balance your energy consumption with your supply of energy required to support your daily load. You cannot begin to do that without first knowing how much energy you need each day.
system design energy calculationsEnergy Load Worksheet (Excel)


IE: 5 - 13 watt light bulbs X 5 hours per day = 65 watts. 18 CF refrigerator @ 5 amps x 120VAC = 600 watts x 6 hours per day = 3,600 watts. THIS IS IMPORTANT: When we say "list your loads ", we mean all your loads. From the cell phone chargers to a hair dryer. Need Help? If you download the Excel worksheet you will only have to indicate how much of each piece of equipment you have and how long your run it.

  • Daily energy budget? It is NOT based on a homes sq. ft. It is NOT based on how many people are living in the house. It is based on the equipment or appliances you want to run and how long each day you typically run them. It does not get more individual than that. The amount of energy you and your family consumes each day will vary among individuals habits and personal choices.
  • How many days of limited sun do you want to be able to run from your battery bank with no sun? (Days of Autonomy) Typical is a minimum of 3 day to 5 days. The more days, the more energy storage required or the bigger the battery bank needed.
  • What is the largest load you expect to run (Watts / Amps / Volts IE: 240V Well Pump @ 9.5 Amps) which will help drill down which kit best fits your needs.
  • Click on the sub-tab above "Planning Design & Installation Tips" to learn more.

Defining Your Daily Energy Load

The first step in determining how many solar panels you will need, amount of battery energy storage or how big your inverter should be is to figure out how many watts of power you need per day. Since you determine what you are trying to run, and how long each day you want to run the items, the first place you have to start, after reducing your loads, is to determine your daily energy budge or daily loads. You are going to want to reduce your daily energy demands first before you start to calculate your loads because it is cheaper to save energy than to make energy.

All the Parts Needed; Looking at The Whole System

A typical stand-alone system consists of solar panels, usually connected in series of 2 or 3, which product DC electricity from the sun. The solar panels are connected to a charge controller which controls the pace at which batteries are recharged which is connected a battery bank. You will then need an off-grid inverter to convert the DC (Direct Current) electricity stored in the battery bank to AC (Alternating Current) electricity which is more commonly used in home appliances. (Click on the 2nd sub-tab above "Planning Design & Installation Tips" to learn more.)

Where to Get Started; Cheaper to Save Energy Than to Make Energy

The trick to off-grid living is energy conservation and efficiency. The starting point in planning your system is to first reduce demand. Most people in America can easily cut their electricity consumption in half. Reducing your family's energy consumption by conserving and investing in watt saving home lights and efficient appliances means you are putting your money in your pocket and can substantially reduce the amount of off-grid equipment and or battery bank. As you begin your journey towards freedom from the grid, start by conserving as much as possible first. Its always cheaper to save electricity than to generate electricity. Most off-grid generation is used for lighting, appliances like refrigerators and water pumping. Lighting is the easiest to tackle. Don't stop at compact florescent lights, go all the way to LED which can use 1/6th the watt consumption of compact florescent lighting.

Plannning Design & Installation Tips

Inverter/chargers are engineered to use a battery bank to store energy. The inverter/charger works in conjunction with a renewable energy source from a solar array, wind turbine, generator or utility grid depending on your application. The size (watts/amps output) of a system depends on the amount of power that is required (usually expressed in watts), the amount of time it is used (hours) and the amount of energy available from the sun and or wind in a particular area (sun-hours per day & wind average MPH). The user has control of the first two variables, while the third depends on the location. You cannot accuratly choose the size of a system without first establishing a daily energy budget.

outback

living off-grid Off-Grid Design; EVERYTHING Starts With Your Daily Energy Budget

  • Determine your loads and establish a daily energy budget. How many watts per day does or will your household consume? The most important challenge in a battery based system is to balance your energy consumption with your supply of energy required. You cannot begin to do that without first knowing how much energy you need or will consume each day. Only you control this budget and only you control your daily consumption of electricity at your house or cabin.
system design energy calculationsEnergy Load Worksheet (Excel)

What is the "Power" required by your electric load?

Appliance & Equipment Load List: List and add up your daily electrical equipment load demand in watt hours (wh). Watt hours (wh) and amp-hours (Ah); Watts = Amps X Volts. Watt hours are the most common measure of electricity usage and are the easiest to understand. Amp Hours = Watt hours / System Voltage. Many professional system designers will use amp hours to size a system because amp hours takes into account real world behavior of solar panels and battery banks. Either method will arrive at the same conclusion if done properly. For our purposes here, we will primarily use watt hours (wh) when sizing the number of solar panels (and inverter) and amp hours (Ah) for our battery selection. IE: 5 - 13 watt light bulbs X 5 hours per day = 65 watts. 18 CF refrigerator @ 5 amps x 120VAC = 600 watts x 6 hours per day = 3,600 watts. THIS IS IMPORTANT: When we say "list, estimate and determine your loads or daily energy budget ", we mean all your loads. From the cell phone chargers to a hair dryer. Need Help? If you download the Excel worksheet you will only have to indicate how much of each piece of equipment you have and how long your run it.

System Voltage or Battery Bank Voltage:

tech notesTIP; Higher battery voltage means less resistance which allows equipment to run cooler. Cooler electrical equipment = longer life. We recommend 48 VDC battery bank for systems larger than the micro kits.

Derate Factors  
Wire Loss 3%
Panel Mfg. Tolerance 5%
Panel Mismatch 2%
Diodes/Connections 1%
Panel Soiling 5%
Battery Efficiency 15%
Panel PTC (Temp) 12%
Charge Controller 5%
Total  48%

Your system voltage means the nominal voltage you select for your battery bank, charge controller and inverter. Here are some things to consider when choosing your systems voltage:

The DC system voltage is established by the battery bank in off-grid systems. A major factor in making this decision is how much power will be required from the batteries. As power demands increase it is advisable to raise the battery voltage one because of less resistance but a major consideration is you should not put more than 2 banks in parellel of batteries and never more than 3 on one charge controller.

This voltage is important because establishes the type of charge controller and inverter that will be selected. The selection of the battery bank voltage affects the currents. A 1200 watt off-grid system operating at 12 volts draws 100 amps. (1200w / 12v = 100A). The same system draws only 25A at 48 volts. Lower amps reduces the size of conductors, over current protection devices, disconnects and charge controllers. Additionally, since voltage drop and power losses are smaller at lower amps, higher voltage off-grid systems are more efficient. As a rule of thumb, off-grid systems up to 1000 watts use a minimum 12 volt battery bank which limits DC currents to less than 84 amps. For 2000 watt systems, often times a 24 volt battery banks is used. For 5000 watt system a 48 volt battery bank should be selected. NOTE: There is nothing wrong with choosing a 48 VDC system for 6 panels and up, however you need to size the array in increments of 3 panel series because your array voltage needs to be at least 20% higher than your battery bank. IE: 9 panels, 3 wire in series x 3 in parallel for 48VDC battery bank. 8 panels, 4 x 2 in series for 24VDC battery bank.

Daily Off-grid System Charge Requirement in Amp Hours:

Since the energy output to the loads must be balanced by the energy input from your solar panels, we need to calculate your daily charge requirement in amp hours as that number will come in handy later. Take your total daily watts x 48% (derate rule of thumb) to account for power losses in inverter, circuits, wire transfer loss, battery efficiency and module temperature. Now divide by the system voltage you chose based on the previous section and write this number down. This is the charge in amp hours your solar panels will have to provide each day to meet your load requirements you have set. Example 5,000 watts daily load total X 48% = 7,400 watts / 48 volt system = 154 amp hours that will need to be generated. Another way to put it is this means that the daily Ah demand on the batteries will be 154 Ah.

living off-grid Make the Power; Size Your Solar Panel Array; Input Must Equal Output.

Number of Solar Panels = Daily Watt Requirement (1 - 24 hour period (Energy Budget)) + 48% (Derate Factor) ÷ shortest day sun hours ÷ panel STC rating = number of solar panels needed.

The number of solar panels you will require is a basic off-grid formula that considers your total daily energy requirements X (+) 48% (rule of thumb) to allow for losses in wiring distribution efficiency, panel real world performance Vs. factory STC rating, battery and inverter efficiency. You then take that number and ÷ the lowest solar irradiance available in the area of the system which is the shortest daylight month of the year (December). The last step is to ÷ that number by the STC watts of the solar panel rating. IE: 8,000 watts per day energy budget X 48% = 11,400 Watt-Hours/Day of energy to be generated. 11,400 Watt-Hours per day div the available sun hours in your area (Solar Irradiance) in December which has the shortest day of the year.

Solar Insolation / Lowest Available “Sun-Hours Per Day”lowest peak sunhours

Off-Grid systems use a sizing methodology than is different from grid-tied systems. Since you are on your own with no utility to back you up, you must consider the shortest day of the year or the amount of available sun in December.

Look up the solar irradiance near your area from our lowest peak sun hour resource map. Find the nearest city to your home and write down the lowest daily sun hours. Divide your daily load calculation (Daily energy budget + 48%) ÷ by lowest available sun hours per day from the solar irradiance chart. For example, if the daily load calculation (Daily energy budget + 48%) is 11,400 watts, and the site is near Salt Lake City UT, you would take 11,400 watts / 4 sun hours = 2,850 watt solar array. That means if you choose 300 watt solar panels you would need 9.5 (EA) 300 watt solar panels for the size kit you select (Round Down to 9 EA 300 watt panels.

tech notes

The “peak sun hours” for a location is a measure of the total insolation (solar radiation or amount of sun) available and is usually expressed as an average daily value. It represents the total sunlight an area typically experiences at a given time of year by converting it to the equivalent number of hours per day of 1000W/m2 of irradiance (kWh/ m2/day). For off-grid calculations, we do not want to use average but lowest since we have to take into account the shortest day of the year in Dec.

One more factor comes into play, for 48V battery bank you will need to connect at a minimum panels in series of 3 to provide enough volts during the hot days of summer to top off your 48 VDC battery bank. Your voltage from your panel series should be a minimum of 20% above the battery bank on the hottest day of the summer because during the hottest days of summer panels produce less energy. (If you have a very long DC run from your array you may want to go as high as 4 or 5 in series to use smaller size wire.) In our example above, you would need to use 12, 9 or 6 panels so you have strings of 3 for a 48VDC battery bank or strings of 2 for a 24VDC battery bank.

Your energy budget is a personal choice and an opportunity to aggressively manage your daily energy usage. It is always cheaper to save energy than to make energy. NOTE: No matter how large your system is, you will need to manage your daily energy consumption as it relates to the amount of available sun. IE: a cloudy stretch of days may only produce 50% of your energy requirements. After many days in a row of heavy cloud cover, you may have to cut back your daily energy consumption until the weather clears a bit.

Evaluating your off-grid site is similar in many ways to grid interactive site evaluations. Key Considerations:

  • Check out areas available to install your solar kit. A few things to consider; array dimensions, orientation, tilt and obstructions. For off-grid installations, ground mount systems are the most popular. (Top-of-Pole or Rack Mounted)
  • Shading of array location. This is important in any solar installation but a must in off-grid systems. Choose and area as close as possible to your power shed but one that has at least 6 hours of sun (+ -) 3 hours from noon.
  • Roof type and age.

tech notesTIP; If you plan on re-roofing within 5 years but are not ready yet, some homeowners will replace only the shingles located under the solar array when the panels are installed and leave the rest for later.

tech notesTIP; Solar cells are activated by visible light not ultra-violet or infra-red. Solar panels produce electricity when exposed to sun light, but plan to keep your inverter and battery bank indoors.

  • Battery Bank and Power Center Location. The battery bank should be no further than 10' from the inverter.

living off-grid Store The Energy; Battery Sizing and Selection

Battery bank sizing is the part of the off-grid solar wind system that has a higher probability of causing you problems that other parts of your system. Use the battery sizing worksheet to help you through this critical stage. Factors such as your budget may tempt you to look to cheaper battery alternatives but a quality battery will pay off over the years. We recommend you choose a 2VDC or 6VDC battery and connect them in series so that the total DC volatage equals the system voltage. Do NOT put more than 3 banks of batteries on one charge controller.

● Click the Battery Bank Size Tab Above ⇑ to Learn More.

living off-grid Control The System; Power Center = Inverter, Charge Controller & More

Choosing your charge controller:

A charge controller is an electronic voltage regulator used in off-grid solar and wind systems with battery banks to properly control the charge from the solar panels or wind turbine keep the voltage to the battery bank within acceptable limits. The charge controller automatically tapers, stops, or diverts power when batteries become fully charged. Without a charge controller your solar panels or wind generator would continue to send electricity to the battery bank and eventually destroy your batteries.

Your charge controller will:

  • Provide an optimum charge to the batteries.
  • Prevent your battery bank for being overcharged from your solar panels or wind turbine.
  • Prevent unwanted discharging.
  • Provide information on the state of charge of the battery bank.

The simplest charge controllers cut the power when the battery reaches a set voltage, and turn it on when a low voltage set point is reached. Pulse width modulated (PWM) charge controllers turn on and off very rapidly, maintaining the batteries at full charge with whatever power is available. Maximum power point tracking (MPPT) charge controllers optimize the voltage of the solar panels or wind turbine to maximize total power output then convert that to the correct voltage to charge the battery. This process significantly increases the power from a solar array, particularly in low temperatures when battery voltage is significantly below the solar array voltage. Most MPPT charge controllers work with higher array voltages, enabling the use of larger solar panels, which can be more economical on a cost per watt basis. A higher voltage solar array also minimizes the required wire size between the array and the charge controller. While more expensive than PWM controllers, MPPT charge controllers can boost system performance significantly by up to 30%.

Blue Pacific Solar® sells MidNite Solar, Outback and Morningstar charge controllers. All these companies have take much of the work out of the technical calculations required for properly sizing a charge controller with their string calculators. On all our off-grid pre-engineered packages, we have matched the right sized charge controller with the package for you.

Choosing Your Off-Grid Power Center:

Living off the grid means you will be generating, storing and processing every watt your off-grid home or cabin sucks up. If your cabin is going to need AC power, then an off-grid AC inverter is going to be of particular interest to you because you will be depending on it day in and day out.

Off-grid inverters are sold either sine wave or modified sine wave. Sine wave output, which has low total harmonic distortion, will power virtually any type of load, even sensitive audio electronics. Modified sine wave inverters may not run some types of equipment satisfactorily, and some loads won’t run at all.

An off-grid inverter must supply enough power to meet the needs of all the appliances running simultaneously. Before selecting an inverter, you must know the watts your appliances will require and their amp and surge needs. Sizing an inverter for an off-grid system, which is based on instantaneous load, is very different from sizing a grid tied inverter, which is determined by the solar panel array size. A grid tied inverter’s job is simply to convert all the DC electricity from the solar array into AC power, which is fed back into the house electrical system then onto the grid if production exceeds the homes energy consumption. In a grid tied system, the inverter is not responsible for meeting the AC loads, since practically unlimited utility power is available. In the case of an off-grid inverter, the inverter has to provide enough energy to all the AC loads, sometimes at the same time. Say you need to simultaneously power 3,000 Watts from various appliances. For an off-grid system, you’d need an inverter that could supply at least that amount. Note that the solar array size does not enter into this inverter sizing since the inverter pulls its power from the battery bank.

Inverter Surge Capacity

tech notesThe ability of an off-grid inverter to surge to a higher level than its rated continuous output for a short duration to turn over the locked rotor of large loads like well pumps is critical. The inverter specifications that should be looked at are the Maximum Output Amps and the AC overload capability. If there are large loads a good number to look for is a five second surge capability of at least 1 ½ times the rated output of the inverter. If you have a deep well pump, the minimum requirement may be 3X the continuous run amps.

Blue Pacific Solar® only sells inverters that meet Underwriters Laboratories (UL) 1741 standards. So if you are on the fence between two choices of inverters, you might ask and find out if it is UL listed.

Lightning and Surge Protection

The funny blue glass like bulbs you see on the MidNite power center above are AC and DC surge protectors. Lightning can enter a wiring system by either the DC route or AC or both at the same time. The MidNite Solar Surge Protective Device (MNSPD) is a Type 2 device, designed for indoor and outdoor applications. Engineered for both AC and DC electric systems, it protects both transformer and transformer-less inverters without interfering with the GFP protection circuit, it provides protection to service panels, load centers or where the SPD is directly connected to the electronic device requiring protection.

living off-grid Connect it All; Wire Size & Electrical Distribution Partsbreaker box

Combiner / circuit breaker box is a key piece of equipment that begins to bring the pieces of equipment together that allows you to generate electricity. NEC (National Electrical Code) says that each series of strings of panels are to be wired to it's own DC circuit breaker. The combiner box is usually located directly under or near the array

Wire size and breakers are the final items in your off-grid design to consider, but no less important. To have a safe off-grid system, you will need to install breakers and choose the right size wire. If you select one of our pre-wired power systems with your kit, we do all the heavy lifting for you because right size breakers are pre-engineered and pre-wired into each of our power centers. You simply have to hang and connect it following our wire diagram which is supplied with all our kits.

The distance between the combiner box, which is usually located near the solar panels, and the charge controller will be a factor in choosing the best string voltage for the charge controller and battery system. The higher the input voltage the smaller the wire can be for any given amount of power. For example, a system with a 12 volt battery and solar panels consisting of four 6.75 amp 12 volt DC nominal modules located at a distance of 40’ from the batteries could have the modules wired in series, parallel or series and parallel. Input design possibilities in this example are 12, 24, and 48 volts DC. If the panels are configured with the modules wired in parallel, the input voltage would be 12 volts DC with an input current of 26 amps. The same panels wired in series would have an input voltage of 48 volts DC and an input current of 6.5 amps. In this example #1, the 26 amp 12 volts DC panels #1/0 wire, which is prohibitively expensive, would be required to limit voltage drop to 2% which is recommended for 12 volt DC systems. The same panels wired for 48 volts dc would only require a #8 wire. With the #8 AWG wire the 12 volt dc panels would have to be within 7’ of the batteries. The distance that #8 wire can be used is over 5 times greater at 48 volts DC than 12 volts DC.

NOTE: These are just given as examples. At Blue Pacific Solar®®, we would never recommend you use a 12VDC system in your home or cabin. 24VDC are a common choice for micro kits, but 48VDC is a better choice. Higher voltage = smaller wire and less strain on your equipment.

nec code

SAFETY WARNING: Danger to life due to high voltages. Risk of death or serious injury due to electric shock. We strongly recommend you employ the services of a licensed local electrician or other properly trained and qualified persons to complete the final connection.

Wire Size

The amount of current (amps) traveling through any electrical circuit depends on the size of the wire (AWG), the voltage of the array or battery bank, and the one way distance of the wire run. Lower AWG gauge wire has less resistance than larger gauge wire. The longer the distance of your wire run while using lower voltage the larger gauge wire you are going to need.

This chart is useful for finding the correct wire size for any voltage, length, or amperage flow in any AC or DC circuit. For most DC circuits, particularly between the solar panels and the batteries, we try to keep the voltage drop to 3% or less.

tech notesTIP; NEC 690.8 CALCULATION of MAXIMUM CIRCUIT CURRENT. (A)1 Solar Source Circuit Currents. The maximum current (Amps) shall be the sum of parallel solar panel rated short circuit currents multiplied by 125 percent.

wire size
  • Amps = Maximum Number of Amps Through the Circuit
  • Feet = One Way Distance of Wire
  • % Voltage Drop = Percent of Voltage Drop Desired (2 = 2%)
  • Voltage = Voltage Carried by the Wire

Voltage Drop Index Chart (VDI)
AWG Wire Size Copper Wire Aluminum Wire
  VDI Ampacity VDI Ampacity
4/0 99 230 62 180
3/0 78 200 49 155
2/0 62 175 39 135
1/0 49 150 31 120
2 31 115 20 94
4 20 85 12 65
6 12 65    
8 8 50    
10 5 30    
12 3 20    

 

Technical Resources, Solar Consultant & Line Drawing; We Have Your Back

You should not be overly concerned with how or what type of final connection, wire and breaker size because we do the heavy lifting for you. When you make a purchase over $2,000.00 for a kit, your order gets assigned to a Technical Team Captain so your have your own personal solar consultant. Our System Integrators provide polished technical advice on the design and execution of all types of installations. This single point of contact will be there to answer your questions and help walk you through any obstacles you might incur during the process.

When you buy a kit from Blue Pacific Solar®, we supply a custom electrical line drawing that shows you exactly how to connect everything. We will specify on our drawing what size and type of wire and breaker you will need to be NEC code compliant. The line drawing can be used for your permit with the local authority having jurisdiction commonly referred to as AHJ (Building Department). If you need help with your full permit documents for your local AHJ anywhere in the country, our permit document service is available to help take the hassle out of your solar purchase.

magnum

Micro Off-Grid Kits; DIY Site Assembled Load Center (Optional Inverter)

Micro off-grid living is a lifestyle where less is more. From your cabin weekend get-a-way escape or tiny houses, these tiny off-grid kits can be used for very small loads.

grid-tied mission solar
300W Panel Kit
Item # # Solar Panels Daily Watts @
4 Sun Hours
/ Day STC*
Voltage DC (Battery)
/ AC
Price before
30% Federal
Tax Credit
or Local Incentives
0.6 kW Micro Kit 0.6 kW Kit MIDMS-24-600 2 - 300 Watt 2,400 Watts 24 VDC /
(Inverter Optional)
1.2 kW Micro Kit 1.2 kW Kit MIDMS-24-1200 4 - 300 Watt 4,800 Watts 24 VDC /
(Inverter Optional)
1.8 kW Micro Kit 1.8 kW Kit MIDMS-24-1800 6 - 300 Watt 7,200 Watts 24 VDC /
(Inverter Optional)
2.4 kW Micro Kit 2.4 kW Kit MIDMS-24-2400 8 - 300 Watt 9,600Watts 24 VDC /
(Inverter Optional)
3.0 kW Micro Kit 3.0 kW Kit MIDMS-24-3000 10 - 300 Watt 12,000 Watts 24 VDC /
(Inverter Optional)
3.6 kW Micro Kit 3.6 kW Kit MIDMS-24-3600 12 - 300 Watt 14,400 Watts 24 VDC /
(Inverter Optional)
4.2 kW Micro Kit 4.2 kW Kit MIDMS-24-4200 14 - 300 Watt 16,800 Watts 24 VDC /
(Inverter Optional)

Even a small amount of shade is a bad thing.

wind speed When a solar panel is even slightly shaded, it is severely impacted. generatorFor example, the module shown to the right has 2% of its cell area shaded. The power output of the panel is reduced by 33% – a 17:1 impact factor! Look out for even small shade factors like overhead power lines or vent pipes in roofs.

MidNite Solar / Magnum Energy Battery Based Packages

Methodically engineered with advanced power electronics, every component has been specially selected to assure the highest performance in a safe and simple-to-install kit. Ideal for applications with medium power requirements such as off-grid cabins, homes and back-up power systems. Magnum Energy and MidNite Solar, American companies producing products made in America, creating American jobs. We like it... a lot!

grid-tied mission solar
300W Panel Kit
Item # # Solar Panels Daily Watts @
4 Sun Hours
/ Day STC*
Voltage DC (Battery)
/ AC
Price before
30% Federal
Tax Credit
or Local Incentives
0.9 kW MidNite Kit 0.9 kW Kit MNMAGMS-48-900 3 - 300 Watt 3,600 Watts 48 VDC /
120/240 VAC
1.8 kW MidNite Kit 1.8 kW Kit MNMAGMS-48-1800 6 - 300 Watt 7,200 Watts 48 VDC /
120/240 VAC
2.7 kW MidNite Kit 2.7 kW Kit MNMAGMS-48-2700 9 - 300 Watt 10,800 Watts 48 VDC /
120/240 VAC
3.6 kW MidNite Kit 3.6 kW Kit MNMAGMS-48-3600 12 - 300 Watt 14,400 Watts 48 VDC /
120/240 VAC
4.5 kW MidNite Kit 4.5 kW Kit MNMAGMS-48-4500 15 - 300 Watt 18,000 Watts 48 VDC /
120/240 VAC
5.4 kW MidNite Kit 5.4 kW Kit MNMAGMS-48-5400 18 - 300 Watt 21,600 Watts 48 VDC /
120/240 VAC
6.3 kW MidNite Kit 6.3 kW Kit MNMAGMS-48-6300 21 - 300 Watt 11,921 Watts 48 VDC /
120/240 VAC
7.2 kW MidNite Kit 7.2 kW Kit MNMAGMS-48-7200 24 - 300 Watt 28,800 Watts 48 VDC /
120/240 VAC
8.1 kW MidNite Kit 8.1 kW Kit MNMAGMS-48-8100 27 - 300 Watt 32,400 Watts 48 VDC /
120/240 VAC
9.0 kW MidNite Kit 9.0 kW Kit MNMAGMS-48-9000 30 - 300 Watt 36,000 Watts 48 VDC /
120/240 VAC
9.9 kW MidNite Kit 9.9 kW Kit MNMAGMS-48-9900 33 - 300 Watt 39,600 Watts 48 VDC /
120/240 VAC

IMPORTANT: AC Amps Out; Define Your Needs. Single off-grid inverter/chargers continuous AC output current is limited to 30AAC (+ - ). The yellow flag here is that the combination of your normal loads (Not Surge Loads) may exceed a single inverter output current rating (Amps Out) on larger PV systems. It is critical in the design selection that you make sure the continuous AC load combination of your power requirements is at or below the 30AAC output limit of the single inverter in some of these packages. Larger systems like the OutBack Radian have the capability of parallel stacking inverters to provide up to 200 AMPS.

OutBack FLEXpower™ ONE; Off-Grid, Backup, Grid-Tie Packages

The FLEXpower ONE is ideal for smaller applications including cabins, homes, farm buildings, remote communications sites and back-up power systems. Pre-engineered toward one goal: making system design and installation easier and faster for grid-interactive, small backup applications and off-grid or stand alone. UL1741-SA (Rule-21) Compliant

off-grid mission solar
300W Panel Kit
Item # # Solar Panels Daily Watts @
4 Sun Hours
/ Day STC*
Voltage DC (Battery)
/ AC
Price before
30% Federal
Tax Credit
or Local Incentives
0.9 kW FLEXpower Kit 0.9 kW Kit FLEX1MS-48-900 3 - 300 Watt 3,600 Watts 48 VDC /
120 VAC
1.8 kW FLEXpower Kit 1.9 kW Kit FLEX1MS-48-1800 6 - 300 Watt 7,200 Watts 48 VDC /
120 VAC
2.7 kW FLEXpower Kit 2.7 kW Kit FLEX1MS-48-2700 9 - 300 Watt 10,800 Watts 48 VDC /
120 VAC
3.6 kW FLEXpower Kit 3.6 kW Kit FLEX1MS-48-3600 12 - 300 Watt 14,400 Watts 48 VDC /
120 VAC
4.5 kW FLEXpower Kit 4.5 kW Kit FLEX1MS-48-4500 15 - 300 Watt 18,000 Watts 48 VDC /
120 VAC

What Inverter Should Your Choose?

tech notesTo determine the size of the inverter needed in your application, add up the demand from all your appliances that are likely to operate at the same time (Watts & Amps). The inverter should be sized to handle both the surge (start up) requirements as well as the continuous run or duty demand over extended times for equipment like refrigerators, well pumps and washing machines. Small appliances often times require 2X their amps to turn over the locked rotors of the motors. Deep well pumps can be 3X the continuous run amps.

OutBack Radian Large Solar Pre-Engineered Off-Grid / Grid-Tie Packages

The Radian Series GS8048A-01 Grid/off-grid™ with GSLC175-PV-120/240 Prewired Load Center (full-flexibility grid-interactive / off-grid) inverter/charger that is engineered toward one goal: making system design and installation easier and faster for grid-interactive and comprehensive off-grid applications. UL1741-SA (Rule-21) Compliant

off-grid mission solar
300W Panel Kit
Item # # Solar Panels Daily Watts @
4 Sun Hours
/ Day STC*
Voltage DC (Battery)
/ AC
Price before
30% Federal
Tax Credit
or Local Incentives
3.6 kW Radian Kit 3.6 kW Kit RADMSM-3600 12 - 300 Watt 14,400 Watts 48 VDC /
240 VAC
4.5 kW Radian Kit 4.5 kW Kit RADMSM-4500 15 - 300 Watt 18,000Watts 48 VDC /
240 VAC
5.4 kW Radian Kit 5.4kW Kit RADMSM-5400 18 - 300 Watt 21,600 Watts 48 VDC /
240 VAC
6.3 kW Radian Kit 6.3 kW Kit RADMSM-6300 21 - 300 Watt 25,200 Watts 48 VDC /
240 VAC
7.2 kW Radian Kit 7.2 kW Kit RADMSM-7200 24 - 300 Watt 28,800Watts 48 VDC /
240 VAC
8.1 kW Radian Kit 8.1 kW Kit RADMSM-8100 27 - 300 Watt 32,400 Watts 48 VDC /
240 VAC
9.0 kW Radian Kit 9.0 kW Kit RADMSM-9000 30 - 300 Watt 36,000 Watts 48 VDC /
240 VAC
9.9 kW Radian Kit 9.9 kW Kit RADMSM-9900 33 - 300 Watt 39,600 Watts 48 VDC /
240 VAC
10.8 kW Radian Kit 10.8 kW Kit RADMSM-10800 36 - 300 Watt 43,200 Watts 48 VDC /
240 VAC
14.3 kW Radian Kit 14.3 kW Kit RADMSM-14400 48 - 300 Watt 57,600 Watts 48 VDC /
240 VAC

What's the difference between watts and watt hours?

ac powerWatt and watt hours are often interchanged, misused and can be just plain confusing. A watt (W) is a measurement of power which is the rate of electricity that is being generated or consumed. A watt hour (wh) is the same energy over a period of time. A light bulb rated at 20 watts, in 1 hour it will consume 20 wh of energy, and in 5 hours the same light bulb will consume 100 wh of energy. 1 watt hour (wh) = 1 watt of power supplied for 1 hour. Think of watts (w) as the speed you’re running and watt-hours (wh) as the distance you ran. Ok professor, need to go deeper? One joule per second is a measurement of the rate of power flowing. 1 watt is a unit of energy equal to the power of one watt operating for one hour or 3,600 joule's.

 

Personal Technical Advisor

Line drawing questions or just stuck? No worries we have your back and will be here to help whenever you have questions about your purchased kit or plans. For orders larger than $2,000.00 a Technical Sales Team Group Captain will be assigned your account. Your Technical Advisors job is to coordinate all parts and pieces of your order and to work with you throughout the process. This support helps because we will be providing you with a single contact point to call with your questions. Your technical support contact does not replace the maufactures warranty technical support. DIY means you accept the responsiblity of reading and following the plans and other installation documents prior to tackling the installation.

*STC - To learn more about solar panels and how they are measured you need to know what STC stands for. STC in an acronym for "Standard Test Conditions". All solar panels are rated in watts. The watt rating is how much power the panel will produce in full sunlight at 25 degrees C (77F). This is the industry standard (STC) for all PV panel ratings (PV means Photovoltaic which is a fancy word for solar). Solar panel manufactures have long used this test standard which is 1,000 watts per square meter solar irradiance, 1.5 Air Mass and a 25 degrees Celsius cell temperature.

PTC is an acronym for "PV-USA". The PV-USA test conditions were developed at the PV USA test site at the University of Davis, California for standards established by the California Energy Commission that are considered closer to real world conditions (Real World Vs. STC factory test conditions). The PTC rating test is 1,000 watts per square meter solar irradiance, 1.5 Air Mass, and 20 degrees C ambient temperature at 10 meters above ground level and wind speed of 1 meter per second. In California, solar panels manufactures must be tested and rated independently at the PV USA test facility at the University of Davis (CA) to be considered for rebates.

NOTE: Neither PTC nor STC account for "real-world" losses. Actual solar systems will produce lower outputs due to soiling, shading, module mismatch, wire losses, inverter and transformer losses, shortfalls in actual nameplate ratings, panel degradation over time, and high-temperature losses. On the inverse, solar panels may out produce their rated power in cold high altitude locations.

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    off-gridSAFETY WARNING: Danger to life due to high voltages. Risk of death or serious injury due to electric shock. Always employ the services of a licensed local electrician or other properly trained and qualified persons to complete final connections.
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