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Battery Pack - Testing
OPEN CIRCUIT VOLTAGE TEST - NO LOAD
State of charge - 48vdc battery pack
State of charge - Individual 12v battery
% Charge
Volts
% Charge
Volts
100
50.93
100
12.70
90
50.47
90
12.50
80
49.99
80
12.42
70
49.49
70
12.32
60
48.96
60
12.20
50
48.41
50
12.06
40
47.83
40
11.90
20
47.26
20
11.58
10
46.03
10
11.31
LOAD-TESTING THE BATTERY PACK WITH DIGITAL VOLT-OHM METER (DVOM)
The normal full-charge, open-circuit voltage reading for the battery pack will be approximately 52vdc. As a quick test,
hook your DVOM with the min/max feature selected (if available). Drive the go-kart one lap or more, making sure to
fully load the system with a brief, maximum acceleration and/or by sliding the go-kart along the track’s safety rail at full
acceleration to “load” the battery pack.
If the pack is good, typical minimum voltage readings will be in the 47-48 volt range. Anything less requires immediate
further testing (see testing individual batteries).
LOAD TESTING INDIVIDUAL BATTERIES WITH DVOM
This procedure requires a DVOM with a min/max feature. This will memorize the maximum voltage and the minimum
voltage readings attained, as long as this feature is activated.
Attach the leads to the battery to be tested; secure the meter and drive a lap around the track. Fully accelerate to put
maximum load on the battery, sliding the go-kart along the track rail for a few seconds with the full throttle applied.
After the test lap, check the minimum voltage reading attained; a good battery will not go below 9.6vdc. If you get a lower
reading, the battery has failed the test and must be replaced.
NOTE:
Placing a failed battery on a separate, slow charger may bring it back.