Checked as a bank of 4 packs, which is the smallest number that accepts this inverter’s 175 amp charge current. Fewer packs still run the system, with the charge rate capped in inverter settings.
Full specifications: Sol-Ark 12K and BigBattery Owl 48V.
The four checks
Voltage window: Overlapping window 44.8 to 58.4 V
The inverter operates from 42 to 63 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: 175 A into a 200 A limit
The inverter tops out at 175 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Surge rating: Battery surge figure unpublished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 400 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: Battery publishes no protocol
The inverter speaks CAN, RS485. This battery publishes no communication protocol, so closed loop is not on the table and the pairing runs on voltage limits set by hand. Confirm with the manufacturer that no port exists before assuming it.
What this means when you install it
Set the inverter charge current to 175 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 4 packs share current evenly.
The inverter speaks CAN, RS485. This battery publishes no communication protocol, so closed loop is not on the table and the pairing runs on voltage limits set by hand. Confirm with the manufacturer that no port exists before assuming it.
Figures side by side
| Field | Sol-Ark 12K | BigBattery Owl 48V |
|---|---|---|
| Voltage window | 42 to 63 V | 44.8 to 58.4 V |
| Charge current | 175 A delivered | 200 A accepted (4 packs) |
| Peak draw | 12,000 W surge | surge unpublished |
| Usable capacity | n/a | 20.48 kWh (4 packs) |
| Comms | CAN, RS485 | none |
Manufacturer documents
Manufacturer documents: Sol-Ark resources and manuals. Figures here should be read against the revision that covers your serial number, because manufacturers revise specifications without changing the model name.
Manufacturer documents: BigBattery product manuals. 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.
Sol-Ark 12K on AmazonBigBattery Owl 48V 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 BigBattery Owl 48V
EG4 6000XP with BigBattery Owl 48V
Partial match, some fields unverified.
EG4 18KPV with BigBattery Owl 48V
Partial match, some fields unverified.
EG4 FlexBoss21 with BigBattery Owl 48V
Partial match, some fields unverified.
Sol-Ark 15K with BigBattery Owl 48V
Partial match, some fields unverified.
Questions people actually ask
Will the Sol-Ark 12K work with the BigBattery Owl 48V?
Partial match, some fields unverified. Checked as a bank of 4 packs, which is the smallest number that accepts this inverter’s 175 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 4 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 CAN, RS485. This battery publishes no communication protocol, so closed loop is not on the table and the pairing runs on voltage limits set by hand. Confirm with the manufacturer that no port exists before assuming it.
What charge current should I set?
The inverter tops out at 175 amps and the battery accepts 200 amps, so a default install cannot overrun the pack. Adding batteries in parallel raises the accepted current further.