MLI Ultra 12/2750, 12/5500, 24/5500 – User and Installation Manual
11. STORAGE
The battery should be stored in a dry and well-ventilated environment. The rate of self-discharge is
less than 5% per month. High or low ambient temperature affects the self-discharge rate of the
batteries and natural aging.
If the battery will not be used for a period exceeding 3 months, we advise the following:
• If external AC power is available switch off all loads and switch on the charger. Apply a float
voltage as specified in the following table.
• If no external AC power is available:
- Charge the battery to > 80% of its capacity before storage.
- Set the safety relay knob to “LOCK OFF”, see page 11.
- Make sure MasterBus powering is not set to "Always on" (see Configuration tab in
MasterAdjust).
In this setup the batteries can be kept at least 6 months without maintenance. However, it is highly
recommended to charge the battery to > 80% of its capacity every 100 days.
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