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Beauh: Unless you have the Solar Converter in "Load Balance" mode, it won't equalize your batteries. If one battery is already weaker than the other, and you have the Solar Converter in "Step Down Convert" mode, then the charge from the alternator will have some resistance going through your battery bank with the low side battery being weak. Once the imbalance worsens, you will find that your low side battery will be drawn down and the high side battery will boil over (cook). You best bet is to start with two identical fresh batteries and never to tap 12v power from the low side battery.
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