Add to Cart SMA SMA SI4548-US-10 Sunny Island 4548 Inverter/Charger $3,792.99 SMA SI4548-US-10 Sunny Island 4548 - 4.5kW 48VDC Inverter and/or Charger 120V. (Bidirectional battery inverter for stand-alone operation.) The new SMA Sunny Island 4548-US and 6048-US inverters are based on the proven off-grid technology in the Sunny... Compare Add to Cart Add to Wishlist