SolarPairing / Works, but open loop
SMA Sunny Island SI 4548-US / SI 6048-US × BigBattery 48V Rhino 14 kWh / HSKY 5.3 kWh LiFePO4
BigBattery publishes an integration guide for its 48 V Rhino and HSKY LiFePO4 batteries with SMA Sunny Island SI 4548-US and SI 6048-US inverter-chargers. The guide requires sizing the battery bank for the inverter and charger current, then configuring Sunny Island with VRLA voltage parameters because no BMS communication is available. This is an open-loop installation: recheck every charge, temperature and firmware setting against the current BigBattery and SMA documentation before commissioning.
Status
Works, but open loop
Last verified
2026-10-06
01 / About this pairing
BigBattery publishes an integration guide for its 48 V Rhino and HSKY LiFePO4 batteries with SMA Sunny Island SI 4548-US and SI 6048-US inverter-chargers. The guide requires sizing the battery bank for the inverter and charger current, then configuring Sunny Island with VRLA voltage parameters because no BMS communication is available. This is an open-loop installation: recheck every charge, temperature and firmware setting against the current BigBattery and SMA documentation before commissioning.
02 / Source
https://bigbattery.com/2022/05/10/setting-your-sma-sunny-island-inverter-to-work-with-bigbattery-48-volt-lifepo4-batteries/