Fronius has such a plug’nplay design, 30 seconds to exchange the inverter. Nice.
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No freakin clue. Never had one fail on me. Never had to look.
If you have a compressor of a blower, I’d recommend giving the unit a good blowout. After 7 years there’s probably a heap of dust on the heatsinks reducing the cooling efficiency. I need to do it regularly to my multiplus due to the environment it’s in…
Ian