Checked as a single pack, which covers this inverter’s charge current on its own.
Full specifications: Deye SUN-12K-SG04LP3-US and BYD Battery-Box Premium LVS 8.0.
The four checks
Voltage window: Overlapping window 40 to 57.6 V
The inverter operates from 40 to 60 volts and the battery cuts off outside 40 to 57.6 volts. Both stay inside 40 to 57.6 volts, which covers a normal LiFePO4 charge and discharge cycle with margin at both ends.
Charge current: 240 A into a 250 A limit
The inverter tops out at 240 amps and the battery accepts 250 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Surge rating: Battery surge figure unpublished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 18000 watts draws roughly 375 amps at 48 volts. This battery publishes a 250 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: Both speak CAN, no document names the pair
The inverter and the battery both support CAN. 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 240 amps or less. That is the inverter maximum, which this bank can absorb. Protect the battery run with a 350 amp Class T fuse and two parallel runs of 2/0 cable.
The inverter and the battery both support CAN. 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 | Deye SUN-12K-SG04LP3-US | BYD Battery-Box Premium LVS 8.0 |
|---|---|---|
| Voltage window | 40 to 60 V | 40.0 to 57.6 V |
| Charge current | 240 A delivered | 250 A accepted |
| Peak draw | 18,000 W surge | surge unpublished |
| Usable capacity | n/a | 8.0 kWh |
| Comms | CAN, RS485 | CAN |
Manufacturer documents
Manufacturer documents: Deye download centre. Figures here should be read against the revision that covers your serial number, because manufacturers revise specifications without changing the model name.
Manufacturer documents: BYD Battery-Box 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.
Deye SUN-12K-SG04LP3-US on AmazonBYD Battery-Box Premium LVS 8.0 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 BYD Battery-Box Premium LVS 8.0
EG4 6000XP with BYD Battery-Box Premium LVS 8.0
Partial match, some fields unverified.
EG4 18KPV with BYD Battery-Box Premium LVS 8.0
Partial match, some fields unverified.
EG4 FlexBoss21 with BYD Battery-Box Premium LVS 8.0
Partial match, some fields unverified.
Sol-Ark 12K with BYD Battery-Box Premium LVS 8.0
Partial match, some fields unverified.
Questions people actually ask
Will the Deye SUN-12K-SG04LP3-US work with the BYD Battery-Box Premium LVS 8.0?
Partial match, some fields unverified. 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 350 amp Class T fuse and holder, two parallel runs of 2/0 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 CAN. 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 240 amps and the battery accepts 250 amps, so a default install cannot overrun the pack. Adding batteries in parallel raises the accepted current further.