When designing a residential or commercial solar array, one of the most critical decisions is selecting the inverter type: a traditional string inverter or a modern hybrid inverter. Here is a comparison to help you choose the best fit for your client:
String Inverters (e.g. SMA Sunny Tripower, SolarEdge Home Hub)
- How they work: Convert the DC power generated by the solar panels directly into AC power for use in the building or export to the grid.
- Best for: Standard solar installations where the homeowner has no plans to add battery storage, or where the budget is the primary constraint.
- Pros: Lower upfront cost, highly mature technology with long lifespan, and simple installation.
- Cons: Retrofitting a battery later requires an additional AC-coupled battery inverter, which increases conversion losses.
Hybrid Inverters (e.g. Fronius Symo GEN24 Plus, Sungrow SH10RT, GoodWe GW10K-ET)
- How they work: Combine a solar inverter and a battery inverter into a single unit. They can route DC power directly from the panels into a DC-coupled battery without converting it to AC first.
- Best for: New installations where battery storage is included from day one, or where the homeowner wants the system to be 'battery-ready' for future expansion.
- Pros: Higher efficiency for battery charging, simplified single-device installation, and built-in backup power features during grid blackouts.
- Cons: Slightly higher initial investment compared to standard string inverters.
For most modern residential systems, hybrid inverters are the preferred choice due to the rising demand for battery storage and grid independence.