Enphase performance guide

Enphase IQ series microinverters carry a 25-year warranty, which is exceptional for inverter technology. Earlier IQ6 and M series units have a 15–20 year typical lifespan. The 25-year warranty aligns the inverter and panel lifespans, which simplifies long-term planning.

Enphase's per-panel monitoring makes it easy to spot individual microinverter failures. If one panel reads consistently low (not just on cloudy days or during partial shading), the microinverter on that panel has likely failed and needs replacement.

An Enphase IQ8 microinverter costs $150–$200 plus installation labour (typically 1–2 hours). If the unit is within the 25-year warranty period, Enphase covers the hardware cost — you pay only for labour.

Less often than string inverter systems, because individual failures are visible in the app. However, a thermal inspection is still valuable to identify panel-level issues like hotspots and microcracks that the microinverter data alone won't reveal.

IQ6 and IQ7 are earlier generations with 25-year warranties. IQ8 (current) adds grid-forming capability — meaning it can power your home during a grid outage without a battery, using only sunlight. If you have M series units (M190–M250), these are end-of-life and replacements are becoming necessary.

Yes — each new panel gets its own microinverter, making it straightforward to expand. You'll need a licensed electrician to add panels and register them in the Enlighten app. There's no practical system-size ceiling with Enphase.