BCU-NEV-XXC MANUAL
1.0
A visual check of the battery pack during charging should be made every 3 months. Switch off the
BCU and on again to check that the contactor is operating correctly. Check the cells for corrosion or
other damage.
Important Notes
•
Recharge fully regularly
LFP batteries do not have a memory. However every so often it is important to charge the battery pack
completely until the charger switches off. Continual partial recharges will prevent the BMS balancing the
pack and so may result in premature charger disconnects when the battery is next fully charged.
•
Never tap a portion of the battery for powering lower voltage peripheral
devices.
This will unbalance the battery and result in continual charging errors. Use a suitable DC-DC converter
to power low voltage devices.
•
Do not bypass the BCU during charging.
It is designed to protect your battery but cannot do so if it is disconnected. The charge current must be
supplied via the BCU. If there is a problem with the BMS do not charge the battery until it is corrected.
•
Do not allow the battery to go flat.
If it goes flat this is a very serious situation. The
battery should be periodically charged when it is being stored to prevent self discharge. The BMS
uses a small amount of power whether the battery is used or not so regular charging is important.
Some Q and A
Am I better off to go with 3 x 70AH cells or 1 x 210 AH cell? Are 3
batteries a safer way to go than 1?
No, simpler is better.
What does the external fuel gauge tell you?
10 segments of battery fuel level (Ah counting method, not simple voltage level), power
and warning lights.
Can these batteries be charged through an Anderson charger from the car?
Yes but a DC-DC charger is advisable because of voltage drop in the wires.
Do I need different chargers to what I listed?
It is best to purchase a dedicated LFP charger, we have a 12V 45A model.
Can these batteries be charged straight from the DC outlet on a Honda
generator?
Yes if you wish, but it will be slow.
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