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small garage solar project
#11
Although that solution worked, my battery is draining overnight. Do I just need to put a diode on positive feedback from solar panel?
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#12
Interesting. The charge controller "should" have a diode in it to prevent backfeeding at night. Are you sure the batteries drained because of the panels, or did the inverter drain them?

You could put a diode on the panel side and see what happens.
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#13
Just make sure to add proper fusers or breakers . Happy it works now
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#14
Are you leaving the inverter running over night too (it'll drain the batteries) or just powering up the inverter when you use the lights? (this is what I'd do)
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#15
Hi, thanks for all your replies. When I went to put a diode on the panel side of the system, I realised that I'd already put one in ages ago! Doh! I think the logical explanation is that the inverter is draining the battery as suggested by Redpacket. I wanted the system to work so that I just flipped a light switch when I went in the garage. The inverter is half way into the garage so it kind of defeats the object in a way.
Perhaps I could put a switch between the battery and inverter and mount this on the wall as I enter the garage. I think that may be the solution.
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#16
Or Use lights that are designed for battery voltage and get rid of the inverter in the equation?
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#17
(08-01-2019, 10:58 AM)daromer Wrote: Or Use lights that are designed for battery voltage and get rid of the inverter in the equation?

yes, that would have been sensible! It was more of an experiment with some bits and bobs that I had, so that I could learn from it.  I plan to build a bigger system to power part of the house at some point.
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