Checked as a bank of 2 packs, which is the smallest number that accepts this inverter’s 130 amp charge current. Fewer packs still run the system, with the charge rate capped in inverter settings.
Full specifications: OutBack Radian GS8048A and SunGold 48V 100Ah Rack.
The four checks
Voltage window: Overlapping window 44.8 to 58.4 V
The inverter operates from 40 to 64 volts and the battery cuts off outside 44.8 to 58.4 volts. Both stay inside 44.8 to 58.4 volts, which covers a normal LiFePO4 charge and discharge cycle with margin at both ends.
Charge current: 130 A into a 200 A limit
The inverter tops out at 130 amps and the battery accepts 200 amps, so a default install cannot overrun the pack. Adding batteries in parallel raises the accepted current further.
Surge rating: Battery surge figure unpublished
A surge to 12000 watts draws roughly 250 amps at 48 volts. This battery publishes a 200 amp continuous rating and no separate surge figure, and continuous is the wrong number to check a motor start against. Confirm the peak rating and its duration with the manufacturer before running motor loads.
Closed-loop communication: No shared protocol
The inverter speaks Modbus and the battery speaks CAN, RS485. There is no common protocol between them, so closed-loop operation is off the table regardless of cabling.
What this means when you install it
Set the inverter charge current to 130 amps or less. That is the inverter maximum, which this bank can absorb. Protect the battery run with a 250 amp Class T fuse and 4/0 AWG cable wired to a busbar rather than daisy chained, so all 2 packs share current evenly.
The inverter speaks Modbus and the battery speaks CAN, RS485. There is no common protocol between them, so closed-loop operation is off the table regardless of cabling.
Figures side by side
| Field | OutBack Radian GS8048A | SunGold 48V 100Ah Rack |
|---|---|---|
| Voltage window | 40 to 64 V | 44.8 to 58.4 V |
| Charge current | 130 A delivered | 200 A accepted (2 packs) |
| Peak draw | 12,000 W surge | surge unpublished |
| Usable capacity | n/a | 10.24 kWh (2 packs) |
| Comms | Modbus | CAN, RS485 |
Manufacturer documents
Manufacturer documents: OutBack Power documentation. Figures here should be read against the revision that covers your serial number, because manufacturers revise specifications without changing the model name.
SunGold has no public document library this site has been able to verify. Every figure on this page therefore needs checking against the paperwork that shipped with your unit.
Both units, current pricing
Prices on these move week to week, and the battery is usually the line item worth watching.
OutBack Radian GS8048A on AmazonSunGold 48V 100Ah Rack on AmazonComms cableAffiliate links. As an Amazon Associate this site earns from qualifying purchases, at no extra cost to you. Prices and stock change often, and a listing appearing here is not a statement that the pairing above is approved.
Other pairings for the SunGold 48V 100Ah Rack
EG4 6000XP with SunGold 48V 100Ah Rack
Partial match, some fields unverified.
EG4 18KPV with SunGold 48V 100Ah Rack
Partial match, some fields unverified.
EG4 FlexBoss21 with SunGold 48V 100Ah Rack
Partial match, some fields unverified.
Sol-Ark 12K with SunGold 48V 100Ah Rack
Partial match, some fields unverified.
Questions people actually ask
Will the OutBack Radian GS8048A work with the SunGold 48V 100Ah Rack?
Specs conflict on at least one field. Checked as a bank of 2 packs, which is the smallest number that accepts this inverter’s 130 amp charge current. Fewer packs still run the system, with the charge rate capped in inverter settings. The four checks below show which field produced that result.
What does this pairing cost to wire up?
Beyond the two units, a 250 amp Class T fuse and holder, 4/0 AWG battery cable cut to matched lengths, and a busbar if you are running 2 packs. A comms cable if you intend to attempt closed loop, and the pinout is rarely the same between brands.
Where does this pairing go wrong in practice?
The inverter speaks Modbus and the battery speaks CAN, RS485. There is no common protocol between them, so closed-loop operation is off the table regardless of cabling.
What charge current should I set?
The inverter tops out at 130 amps and the battery accepts 200 amps, so a default install cannot overrun the pack. Adding batteries in parallel raises the accepted current further.