Can you indicate the specs from the battery labels? or a link thereto? How 'bout a link to a .pdf of the manual for the unit? You indicate the battery voltage measures 27 volts? The unit must detect the battery voltage at a certain minimum voltage, or it's NO-GO. If they're labeled at 48 volts for instance, that 27 volts isn't enough and it's going to act just as you indicate, and will not even so much as trickle the batteries! We should be able to recover from this. Please advise.
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