Guru
Joined: 03/06/2019
Location: AustraliaPosts: 1584
| Posted: 11:53pm 07 Apr 2025 |
First thing is solar is never 100% Efficent.
You will only get rated power at 12 Pm in summer at the equator. That's what the reating is supposed to represent and even then it's still embellished because it's a flash rating.
They use a flash light source in the testing because as panels heat up above 25C, the output falls off. I have measured panel temp down to 5C in sunlight and the panels were still well above 25C and on a decent day in summer here in Oz, they can go over 80.
The other thing is, those 100W toy panels are notorious for being over rated. If you bought them from fleabay or the like, pretty much gauranteed. In any case, I wouldn't expect to get near rating out of them if you are in the UK.
Some meters can be programed for Bi-directional or only single. They are usualy single direction only unless the bi-directional ability is enabled by the power co. There is a bunch of things some electronic, NON- smartarse meters can do but have to be programed to enable the function.
You could look the meter up and see what you can find in the spec sheet but that well may be it.