Here's a charger design question....
I want to set up a relatively slow, low amperage charging system for a 24V bank.
I ordered a couple of 12/24V transformers (Digikey part #237-1277-ND).
The transformers can be either be wired for 12V @ 10.8A, or 24V @ 5.4A.
I also ordered a boost power supply module that takes a 12V input and provides up to 30V @ 150W (5A) - Amazon http://www.amazon.com/gp/product/B008BFNP62/ref=oh_details_o02_s00_i00?ie=UTF8&psc=1.
If I wire the transformer for 24V, run through bridge rectifier, and filter cap, I should get a voltage high enough to charge a 24V battery bank (right?)? That would be the SIMPLE approach.
The other option would be to wire the transformer for 12V, and use the boost module to step up the voltage. It's a little more complicated (just one module to wire in), but would allow me to more closely specify the charging voltage that I wanted. Though with heat and time, etc, that voltage might drift a bit.... The other advantage of this scheme is that it allows me to tweak the voltage for either AGM or Li batteries, for when I have enough to upgrade.
In either case, I can use an Arduino to monitor the battery voltage and disconnect the battery when it's fully charged.
Thoughts on either scheme??
John
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