Will my 40 amp x 24 volt battery charger backfeed to the PV modules and potentially damage them, or do charge controllers have internal diodes which would prevent this? I.E., should I throw the disconnect on my PV modules before plugging in my battery charger?
Will a battery charger backfeed to solar panels?
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Here is something else to consider. The battery bank itself would "backfeed" to the array, if what you suggest could happen.
I just looked at some CC schematics, and in both I see a series diode as well as the main current passing device that will only function in the desired direction. -
If you try to connect panels to a battery without using a CC, you could have problems with backfeeding. The panels would not be damaged, but the battery could run down during the night.
Battery maintainer panels that do not require a CC usually include a built-in blocking diode.SunnyBoy 3000 US, 18 BP Solar 175B panels.Comment
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