In considering a DIY UPS-ish system (small bank of AGM batteries and an inverter), I knew I wanted/needed a charge controller, but most I found were just intended for keeping e.g. car batteries topped off.
It has since occurred to me that "solar" charge controllers, of which small 10-30 amp versions are in abundance, run off DC input anyway.
Is there anything wrong with feeding any typical charge controller intended for solar panel input with mains power via an ordinary DC power supply like you'd find on, say, any amateur radio operator's desk? Any special considerations beyond making sure I don't feed the controller more voltage than it can handle?
Answer
That sounds like a good idea if you can't find a "proper charger" - which certainly do exist.
Some of the solar chargers are very good, with equalisation cycles and more.
I can't immediately think of any disadvantage of doing this. 12V solar chargers are designed to take Vin of at least 18V and probably 20V+. If you get one with "proper: MPPT it will probably allow you to get maximum charge out of a given voltage source. I say 'proper" MPPT as some of the new controllers use quasi MPPT where they load the source to a specified percentage of source Voc, based on typical PV panel load curves. This may well not be the true MPPT point for a semi random power source and worst case may cause loading issues - but probably not.
Large range of typical solar regulators - Australia
MPPT controller with discussion - USA, CA.
BP GCR series learning controllers - may be too smart in this role?
Lead acid charging tutorial bulk, absorption and float ...
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