What's going on here?

Author	Message
Revlac Guru Joined: 31/12/2016 Location: Australia Posts: 1267	Posted: 09:43am 18 Jun 2025         Quote   So charging a battery represents a load to it? I get that charging is effectively a negative current flow from the cells, but I am connecting a lower voltage (VBat) to a higher (VSol) so I would expect a relaxation if anything. I guess you can measure the voltage dip to see if power is consumed it that direction. Cant say I have seen it, I haven't really been looking and the solar array is fairly large I probably couldn't see it with all the other strings contributing. I have seen some of the solar shed lights, the panels are matched to battery voltage, not sure if they had diodes or not, some are amorphous others are monocrystalline. The larger solar shed lights have 2 battery cells and not sure what else they have inside, but on a long hot sunny day I have on occasion seen the lights turn on with a dull glow, I assumed this was excess power, cover the panel a little and its off again, uncover it and shortly after the lights are glowing again, the rest of the year this doesn't happen.