Reduced solar charge.
360 amphr 12 volt lithium batteries -had 1100 watts of solar panels divided over three solar controllers-have just changed to one 30 amp controller with 300 watt panel and four 200 watt panels with one 60amp Renogy solar controller. The problem is the batteries stop charging at only 13.5 volts which is too low for my needs. What is the problem ?
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