Unfortunately the forum software seems to not like some posts that come from cell phones. It will chop everything after a "character" it does not recognize. So try again and keep your post as simple and short as possible if you use a cell phone.
Unfortunately the forum software seems to not like some posts that come from cell phones. It will chop everything after a "character" it does not recognize. So try again and keep your post as simple and short as possible if you use a cell phone.
or a mac or an ipad and do not use any apostrophes (unfortunately autocorrection on apple devices will often contract and add that apostrophe)
At the risk of going out on a limb, even if the physical systems are identical, it's likely that one or more of your location/orientation parameters differ between your and your father's home.
For example:
1) Panel orientation and tilt
2) Potential shading from foliage and/or chimneys, pipes, etc.
3) The impact of Latitude and Longitude on solar insolation values for your area(s)
4) Local weather phenomena
5) Assuming both systems are functioning normally, there may be small (likely minor/insignificant) differences in DC wiring efficiency, etc.
Many of us load our data to a website called PVOutput so we can compare the output and efficiency (kWh per kW DC installed) of our systems to other similar systems in our local vicinity.
PVOutput.org - share, compare and monitor live solar photovoltaic output data
Sorry your message got cut off. I assume you'll repost more details on system size, type (ex Solar Edge vs Enphase, etc.) and the location of each system. Were they both installed by the same installer? I assume they are of similar age?
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