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Comparison
Microinverters vs String Inverters
Why module-level conversion wins on complex roofs — and the trade-offs to know.
The core difference
A string inverter converts the combined DC of a whole string at once, so the weakest panel limits the rest. A microinverter converts each module independently, with its own MPPT — so shade or mismatch on one panel doesn’t drag down the array.
| Microinverter | String inverter | |
|---|---|---|
| MPPT | Per module | Per string |
| Shading | Isolated to the shaded panel | Affects the whole string |
| Monitoring | Module-level | String/array-level |
| Rapid shutdown | Built in at the module | Needs added RSD devices |
Where Hoymiles fits
Hoymiles HMS and HM-NT microinverters bring module-level MPPT, native NEC 690.12 rapid shutdown, and free module-level monitoring — ideal for shaded or multi-orientation roofs. To add storage, Hoymiles also offers HYS/HAS hybrid inverters.
Trade-offs
Microinverters add distributed electronics on the roof; in return you get granular monitoring and module-level safety. For simple, unshaded arrays a string inverter can be cost-effective — we’ll help you weigh it.
Need help choosing? CSE Solar USA will spec the right Hoymiles system for your project. Call (702) 608-8385 or request a quote.