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The inverter converts DC power from your panels to AC for your home. Choosing the right type — string, microinverter, or hybrid — matters as much as the panels themselves.
Best for: Unshaded roofs, budget-conscious installs
Best for: Complex roofs, partial shading
Best for: Anyone planning to add battery storage
SolarEdge
Sungrow
Enphase
Enphase
SolarEdge
Growatt
Deye
Sofar Solar
Enphase IQ8+ (microinverters) wins on shaded or complex roofs: each panel operates independently, and a single panel failure doesn't take down the system. SolarEdge (string with DC optimizers) is usually cheaper and has stronger hybrid/battery integration (SolarEdge Energy Hub + BYD/LG). For simple unshaded roofs with battery plans, SolarEdge. For complex roofs or longer per-unit warranty, Enphase.
Size inverter AC output to roughly 80–100% of your panel DC capacity. Example: 8 kW of panels pairs well with a 7.6–8 kW inverter. Some 'clipping' at peak sun is acceptable and can actually improve economics — oversizing the DC side by 15–25% is common practice.
Not necessarily — AC-coupled batteries (Tesla Powerwall 3, Enphase IQ Battery) can be added to any existing system. But hybrid (DC-coupled) is more efficient, simpler, and usually cheaper at initial install. With the federal ITC expired, the cost difference matters more.
String inverters: 10–15 years typical, 12-year warranty standard. Enphase microinverters: 25-year warranty. SolarEdge inverters: 12-year warranty, extendable to 25 years. Plan for one inverter replacement during a 25-year panel life — or choose Enphase if you want to avoid mid-life replacement.
National Electrical Code requires rapid shutdown capability on rooftop solar — voltage at the array must drop to safe levels within 30 seconds of activation. Microinverters and DC optimizers achieve this inherently. Standalone string inverters need an MLPE (module-level power electronics) device at the array.