Re: Failure rate of Micro-Inverters vs. Optimizers
Converting from Solar DC to grid AC is a 2-stage process. 1st stage is a DC-DC converter that takes array DC and outputs a stable DC voltage for the 2nd stage which is the AC inverter converting the DC to 6ohz AC. Micro inverters do both stages up on the roof. Optimizers just do the 1st stage. The second stage runs at the low frequency of 60Hz and as such needs large filter caps usually of the electrolytic type which are especially prone to failure at rooftop conditions. Optimizers ought to be more reliable as a result.
2.7kW Trina/Xantrex GT, 3.7kW Trina/SolarEdge, 3kW CSI/SMA GT, Solar well pump on 6, 25yr old Holeck 48W modules. Toyota SR5 converted to 108V EV. Prius w/Enginer PHEV conversion. BSEE, R11-residential, NABCEP, SunnyPro >750kW installed
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