I want to provide uninterrupted 12DC power to my raspberry pi/arduino based remote system. Rather than using a traditional UPS, I thought a LV DC UPS makes more sense which removes the unnecessary AC-DC-AC conversion.
If I'm not wrong, I need a simple charge controller that charges a 12V battery protecting it against overcharging and over draining. It should also supply the load which I suppose will not exceed 1-1.5A. It will be always on and when power goes out, the battery will supply the load.
Will a simple 12V transformer's rectified output feeding an off the shelf solar charge controller be OK? Say something like this: