Do use micro-inverters on your solar systems?

Micro-inverters, like acid washed jeans, seemed like a good idea at the time but in retrospect, not so much.

We installed well over 5,000 Enphase micro-inverters that were supposed to have only one failure per year out of every 330 units. In reality the failure rate was as high as 1 in 8 per year and we have now replaced well over a thousand of these units. We have a dozen or so RMA units arrive every week and probably will for the conceivable future. To make matters worse the company stopped honouring their parts and labour warranty, they still replace the part for free but the home owner has to pick up the installation cost. Because the inverter is located on the roof, under the panel it is not an easy thing to access.

There are other better options if you want to have panel level optimization and monitoring.

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