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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 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...

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...