System Normally Ships in Approximately 3-5 Business Days After Funds Clear. (Subject to Seasonal Increases) ● Line Drawing send via Email [PDF] 3 - 5 business days after funds clear.
Batteries are site specific options that are not included with the base package. [See Related Items Below]
UL-1741 the entire OutBack Radian GSLC 175-AC-120/240 AC-Coupling Center Kit is certified specifically for this application, ensuring a fully-compliant NEC operation. The universal design works well with brands and models beyond SolarEdge grid-tied inverters.
● *Some Assembly Required See Schematic Tab
The AC output bus bar in the OutBack Radian load center is the point of common coupling for the Radian inverter output, the SolarEdge output, and the critical load center’s main bus bar during all modes of operation. When the grid is active, the Radian inverter’s AC input and output are connected via an internal transfer switch making the AC output bus bar a common connection point all the way out to the grid via the main service panel and revenue meter.
Guideline Number One: The daily critical load watt-hours shouldn’t exceed 80% of the watt-hours available from the battery bank. An off-grid system is typically designed to discharge the batteries no more than 50% per day to extend the life of the batteries. However, this assumes that the backup system will only be used a few days or perhaps a week or two per year, so discharging batteries to an 80% depth will not significantly reduce their life below what is considered the normal life cycle for a battery.
RECOMMENDATION - Keep the number of parallel strings of batteries to three or fewer. More than three strings of batteries will shorten your battery life due to uneven charging. That means use higher AH 6VDC or 2VDC batteries for fewer strings. Batteries in Series = Voltage is Additive; Batteries in Parallel = Ah is Additive.
Radian GS8048A Power Center ● 48 VDC Battery Based Inverter. 120/240VAC Output, Continuous Inverter AC Output Current 33.3 AAC 8,000 Watts ● Outback, Radian GSLC175-AC-120/240 Prewired AC Coupling GS Load Center with two 175A breakers, 2-pole 50A ROCB and relay board, 2-pole 120/240VAC 50A bypass breakers, dual 2-pole 120/240VAC 50A input breakers, 10 busbars. ● OutBack Power's Outback, FlexNet DC System Monitor, FN-DC is the ultimate DC system monitoring device. OutBack's integrated networked communications make valuable, usable data available from your system and viewable on an OutBack MATE3 communications device, providing you with the critical answers about your system's health, performance and efficiency.● 240 VAC Generator Compatible.
OutBack Radian AC coupled grid-interactive or Grid/Hybrid renewable energy systems with more sophisticated inverter/chargers and battery storage capabilities can provide off-grid performance when the utility grid power is unstable or down altogether due to outages or emergencies. The OutBack FLEXcoupled system is unique from other AC-coupling types in that its foundation is a superior split-phase inverter/charger with dual AC inputs, transfer switching, power management flexibility and multiple operational modes for a wide range of energy scenarios, and greater dynamic stability.
This allows use of a more elegant, advanced electro-mechanical coupling center, the GSLC175-AC-120/240, to achieve AC-coupling instead of relying on extra frequency circuitry, transformers and diversion loads used in conventional systems which are more costly and complex. Since the OutBack approach is more cost-effective, users have the option of investing in superior, professional-grade energy storage enjoying the utility and security of a system that meets the UL1741 standard from end-to-end.
During an emergency when the utility power goes down and when your solar panels are producing electricity and your inverter (s) are pushing electricity is when our OutBack AC coupling backup system really starts to shine. During a utility power outage, non back up loads are terminated in the main service panel that are not connected to the system, and the utility grid is no longer present. As a result, any excess power that the loads connected to the system’s subpanel do not consume is pushed back through the ac output of the battery-based Radian inverter via the GSLC175-AC-120/240 load center and into the battery bank.
When the sun is shining, power from the SolarEdge grid tie inverter flows to the OutBack Radian Load Center output bus bar where it is consumed by loads connected to the critical load panel. If the load is demanding more than what the SolarEdge can provide from the solar array, then makeup power flows from the grid through the main service panel, through the AC input of the Radian and on out to the output bus bar where it is “blended” with power from the SolarEdge. If more power is produced from the array than is needed by the critical loads, then the excess power moves to the main service panel where it is consumed by those connected loads, with any surplus exported to the grid.
With loss of the utility grid power, the OutBack Radian inverter opens up its internal transfer switch to the grid and goes into backup mode, becoming the new “grid source” to the SolarEdge inverter. This allows the SolarEdge to keep inverting power from the solar array and powering the critical load panel. Any shortfall of power to the loads would come from the OutBack Radian inverting power from the batteries. If solar power production is more than what is needed by the critical loads, then the excess power would flow back in an unregulated charge through the Radian inverter to the battery bank. The Radian “thinks” it is inverting DC power to provide an AC source on its output, which it does, however, any excess power from the SolarEdge is delivered at a higher voltage so it can “push” the power out to the grid if necessary. Since there is no grid to push it to, the power gets pushed back through the Radian inverter to the battery bank. If the battery bank becomes fully charged, the battery voltage will continue to rise as the charging is unregulated.
To prevent the battery bank voltage from going too high when solar production exceeds load demand, a built-in AC Coupling function in the OutBack MATE3 system controller will activate the Radian 12V Aux port, which in turn is connected to an external OutBack 12V dry contact relay. The normally open relay contacts are connected to the Power Reduction Interface (PRI) Port on the SolarEdge inverter. By closing a connection between the zero percent power pin and +5V, the power output from the SolarEdge is slowly ramped down to zero percent. Now the Radian inverter will power the loads until the battery voltage drops 0.4V below the existing voltage target, then the MATE3 commands the 12V Aux to turn off, which will cause the SolarEdge to start exporting 100 percent power again.
The OutBack Radian/SolarEdge string inverter solution is not only a simple and cost effective solution, but one that does not require blackout relays or diversion loads. Being able to control the SolarEdge inverter output with a slow ramp up and down between zero and 100 percent power is a more graceful way to modulate power without the hard stops and starts with mechanical or solid state blackout relay.
Line drawing questions or just stuck? No worries we have your back and will be here to help whenever you have questions. 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 makes it easy for you because we will be providing you with a single contact point and single extension to call with your questions to help make the process easier.