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I had a similar situation, and I got the red light to clear by using a power supply set to 13.6 volts. I watched it carefully, and when one of the cells started to get too high, I lowered it to 13.4 and kept it there until everything was top balanced. The red light went out and the battery has...

If you really want to save on electricity costs, you can always turn a plain old chest freezer into a refrigerator using a Johnson controller. Unlike a refrigerator, the coldness will stay inside when you open the top. Here's what it looks like:

I am having a similar problem in that I wanted to upgrade from 12 volts to 24 by adding another U27 XP to my existing setup of three (the green ones). I bought what was advertised as a green 138AH battery, and what I got was a black one with the label stating it has 130AH capacity. So now I am...