SMA SI4548-US-10 Sunny Island Off-grid Inverter/Charger
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The SMA Sunny Island SI4548-US-10 is a 4.5kW battery-based inverter/charger for 48V systems — the off-grid and backup benchmark, forming stable microgrids from solar, batteries, and generators.
Key Features
- 4.5kW continuous output from 48V battery banks, 120VAC
- Grid-forming inverter — builds a stable AC microgrid other inverters sync to
- AC-coupled architecture — add Sunny Boy solar inverters on the AC side
- Parallel up to 3 units single-phase or multicluster to 100kW+ with MCB boxes
- Integrated battery management for lead-acid and lithium (BMS comms supported)
- Generator support with automatic start control
Specifications
| Model | SI4548-US-10 |
| Rated Output | 4.5kW |
| Battery Voltage | 48VDC |
| Architecture | AC-coupled, grid-forming |
| Stacking | Parallel / multicluster capable |
| Warranty | 10-year SMA warranty (extendable) |
Authorized SMA distribution — full manufacturer warranty (10-year standard US inverter warranty, extendable). Ships via ground; PEAK3/CORE1 commercial inverters ship LTL freight.
| SKU | USS-SMAA-SI4548 |
|---|---|
| Manufacturer | SMA |
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