Solar Inverters: Types, Lifespan and When to Replace Them
🇩🇪 Diesen Artikel auf Deutsch lesenString inverters typically last around 10–15 years, while microinverters often carry 20–25-year warranties. Signs of trouble include error lights, sudden drops in production or a monitoring app showing zero output on sunny days. Replacement costs vary by size and type; check your warranty first.
Solar panels can last 25–30 years or more, but inverters work harder and usually wear out sooner. Planning for an inverter replacement is part of owning solar.
Inverter types
| Type | How it works | Pros | Cons |
|---|---|---|---|
| String inverter | One central inverter for all panels | Lower cost, easy access | Shading on one panel affects the string |
| String + optimizers | Optimizers on each panel, central inverter | Panel-level monitoring, better with shade | More components |
| Microinverters | Small inverter under each panel | Long warranties, shade tolerance | Higher upfront cost, roof access for repairs |
| Hybrid inverter | Also manages a battery | Battery-ready | Higher cost |
Warning signs
- Error or fault lights on the inverter
- Monitoring shows much lower or zero production on sunny days
- Unusual noises or the inverter shutting down in heat
Budget for replacement
When calculating solar payback, include one inverter replacement during the system's life for string inverters:
Solar Panel Payback CalculatorHow many years until solar pays for itself?Try the calculator →Frequently asked questions
Can I upgrade to a hybrid inverter when replacing?
Yes. If you plan to add a battery, replacing a failed string inverter with a hybrid model can save money later.
Does a failed inverter stop all solar production?
With a string inverter, yes. With microinverters, only the affected panel stops.