13-2
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-KARTS
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MPERBOAT
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Specifications subject to change without notice - Check our website for valuable information including videos, workshop and operations manuals. www.jjamusements.com
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FREQUENTLY ASKED QUESTIONS
ABOUT ELECTRIC GO-KARTS
HOW LONG CAN THE KART RUN BEFORE IT MUST BE RECHARGED?
Due to variations in the track design, the length of time the kart can operate will differ from track to track. One of the
biggest issues to remember when setting the run times is to never allow the battery to run lower than 80% of a full charge.
Keeping the battery above 80% will ensure maximum life cycle of the battery. To determine the ride time, you will need
to follow these steps:
Fully charge a kart (a fully-charged battery will be 12.8 to 13.20 volts; a fully-charged battery pack will range from
51.20 to 52.80 volts). Write down the battery voltage on a pad of paper.
Using a stop watch, run the fully-charged kart for 5 minutes (the average length of a session).
After 5 minutes, measure the battery voltage to make sure the battery is now 80% or more charged.
EXAMPLE: 12.8 volts (fully charged battery) x .8 (80% of fully charged battery) = 10.24 volts (battery volt reading
after test) or 51.20 volts (fully charged battery pack) x .8 (80% of fully charged battery pack) = 40.96 volts (battery
pack volt reading after test).
If it is above 80%, recharge, increase the session length and test again. If it is not, decrease the session length and
repeat.
Once the maximum ride time is determined, repeat the charge and run the cycle at least 3 times to ensure consistent
results. Once you know the maximum run time, the session length can be set.
HOW LONG IS THE RECHARGE TIME FOR THE BATTERY PACK?
Determining the recharge time is very similar to the steps above and can be done after the tests to determine run time by
following these steps:
Once the session time is set, run the kart for the determined time. Using the stop watch, begin timing once the
charger begins the recharge cycle, and allow the kart to charge for the same period of time as the session.
Once the recharge time has reached the same time period of the session, disconnect the charger and check the
battery voltage. It should read 12.8 to 13.2 per battery, or 51.20 to 52.80 per battery pack. Typically, it requires
about 10% more recharge time than run time so at 1-to-1 recharge/run time, you should find the battery voltage
slightly lower than 100%. Run the kart again for the predetermined run and recharge time. This time, add 10% to the
recharge time; if your run time is 5 minutes or 300 seconds add an additional 50 seconds to the recharge time (300
x .10 = 30) (300 + 30 = 330) (330 / 60 = 5:50). Disconnect the charger and check the battery voltage. It should read
12.8 volts to 13.2 volts per battery or 51.20 volts to 52.80 volts per battery pack.
If the batteries voltage returns to the fully-charged state, then the recharge time is 5:50. If not, repeat the steps above
and increase the recharge time by 5%, and repeat until the batteries are fully charged.
HOW OFTEN SHOULD I TEST THE BATTERIES?
As mentioned previously, the battery’s are the most stressed part of the electrical system. The goal with testing is to find any
problems with a single battery at the early stages. As a battery begins to have an issue, it will cause stress on the remaining
batteries in the string. The increased stress on the other 3 in the string can possibly cause damage to those as well. The
more often you test the batteries the more likely a problem will be found before spreading to others. We recommend
minimum testing intervals of once evey week per kart. The results should be recorded and compared to past tests.
