Checked as a single pack, which covers this inverter’s charge current on its own.
Full specifications: Growatt SPF 5000 ES and SOK 48V 100Ah Server Rack.
The four checks
Voltage window: Overlapping window 46.4 to 56 V
The inverter operates from 40 to 60 volts and the battery cuts off outside 46.4 to 56 volts. Both stay inside 46.4 to 56 volts, which covers a normal LiFePO4 charge and discharge cycle with margin at both ends.
Charge current: 100 A into a 100 A limit
The inverter tops out at 100 amps and the battery accepts 100 amps, so a default install cannot overrun the pack. Adding batteries in parallel raises the accepted current further.
Surge rating: Peak draw 208 A exceeds 200 A
A full surge to 10000 watts pulls roughly 208 amps, past this battery’s 200 amp surge rating for 3 s. The BMS is the thing that stops it, which means a motor start can drop the whole system rather than just dimming the lights. Adding a second pack in parallel is the usual fix.
Closed-loop communication: Both speak RS485, no document names the pair
The inverter and the battery both support RS485. Neither manufacturer publishes a document naming the other unit, and a shared bus standard is not a shared message format. It may well work on the bench. Confirm the protocol setting with both manufacturers before relying on BMS control.
What this means when you install it
Set the inverter charge current to 100 amps or less. That is the inverter maximum, which this bank can absorb. Protect the battery run with a 150 amp Class T fuse and 1 AWG cable.
The inverter and the battery both support RS485. Neither manufacturer publishes a document naming the other unit, and a shared bus standard is not a shared message format. It may well work on the bench. Confirm the protocol setting with both manufacturers before relying on BMS control.
Figures side by side
| Field | Growatt SPF 5000 ES | SOK 48V 100Ah Server Rack |
|---|---|---|
| Voltage window | 40 to 60 V | 46.4 to 56.0 V |
| Charge current | 100 A delivered | 100 A accepted |
| Peak draw | 10,000 W surge | 200 A surge |
| Usable capacity | n/a | 5.12 kWh |
| Comms | RS485 | CAN, RS485 |
Manufacturer documents
Manufacturer documents: Growatt product downloads. Figures here should be read against the revision that covers your serial number, because manufacturers revise specifications without changing the model name.
Manufacturer documents: SOK product documentation. Figures here should be read against the revision that covers your serial number, because manufacturers revise specifications without changing the model name.
Both units, current pricing
Prices on these move week to week, and the battery is usually the line item worth watching.
Growatt SPF 5000 ES on AmazonSOK 48V 100Ah Server 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 SOK 48V 100Ah Server Rack
EG4 6000XP with SOK 48V 100Ah Server Rack
Partial match, some fields unverified.
Sol-Ark 12K with SOK 48V 100Ah Server Rack
Partial match, some fields unverified.
Victron MultiPlus-II 48/5000 with SOK 48V 100Ah Server Rack
Partial match, some fields unverified.
OutBack Radian GS8048A with SOK 48V 100Ah Server Rack
Specs conflict on at least one field.
Questions people actually ask
Will the Growatt SPF 5000 ES work with the SOK 48V 100Ah Server Rack?
Specs conflict on at least one field. Checked as a single pack, which covers this inverter’s charge current on its own. The four checks below show which field produced that result.
What does this pairing cost to wire up?
Beyond the two units, a 150 amp Class T fuse and holder, 1 AWG battery cable cut to matched lengths, and a busbar if you are running 1 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 and the battery both support RS485. Neither manufacturer publishes a document naming the other unit, and a shared bus standard is not a shared message format. It may well work on the bench. Confirm the protocol setting with both manufacturers before relying on BMS control.
What charge current should I set?
The inverter tops out at 100 amps and the battery accepts 100 amps, so a default install cannot overrun the pack. Adding batteries in parallel raises the accepted current further.