Feeling the Heat
- Oct 24, 2009
My system has the 250W Aurora-Power One microinverters installed on a ground mount system located about 250 feet from the main panel. 26 micros installed in 2013 and another 20 micros in 2015. One micro failed about a year after install, replaced under warranty. Two failed about two years ago, also replaced under warranty. Installing the replacements was not under warranty. Replacing a micro is extremely easy (I watched the electrician), takes about 10 minutes. My system has survived and performed well, both from summer heat into the +90F range and to -35F winter range.
When the system was installed I also had an ethernet cable buried to communicate with the micro data collection devices for the micros, although the micros also can communicate by WI-FI, the distance was too far for a reliable WI-FI connection. There are about 15 data points that each the micro has, and checking the micros involves a quick readout on the home computer. The key data is micro voltage, watts and frequency. Most if not all of the data is down-loadable, so it is easy to track performance over time,
FWIW, June 2021 will set a record for total June monthly power output for my system, now 8 years old: 1,890 kWh with one day to go, and I estimate today will produce about another 65 kWh. I have not been able to discern any panel/micro degradation in power output over this period of time.
Our system is grid-tied under MN net meter law, and it produces 100% of the electricity use in our household, including providing most of the power for our two BEV cars.
Thank you for your thoughts and your input.
when I thought about having to change out micro inverters, due to failure, I wondered if it would be a fairly easy job.
May I ask you, roughly, how much the guy charged you to swap them out? Was it a solar installer that swapped them out, or can a general electrician handle that?
Did you eventually take it upon yourself to switch them out yourself? I thought about that possibility for future consideration.