Installation - Victron energy 12,8V/160Ah Anleitung

A residual discharge current is especially dangerous if the system has been
discharged completely and a low cell voltage shutdown has occurred. After
shutdown due to low cell voltage, a capacity reserve of approximately 1Ah per
100Ah battery capacity is left in the battery. The battery will be damaged if the
remaining capacity reserve is drawn from the battery. A residual current of
10mA for example may damage a 200Ah battery if the system is left in
discharged state during more than 8 days.

3 Installation

Note: Batteries must always be installed in an upright position.
3.1 Short circuit protection
Single battery installation
The battery must be protected by a fuse.
Series connection
Up to four 12,8V batteries can be series connected.
The batteries must be connected to a BMS.
The string of batteries must be protected by a fuse.
Parallel or series parallel connection
Up to ten batteries or strings of batteries can be parallel connected.
The batteries must be connected to a BMS.
Each battery or string of batteries must be protected by a fuse, see
figure 1.
Do not interconnect the intermediate battery to battery connections of
two or more parallel strings of batteries.
3.2 Charging batteries before use
The batteries are aproximately 50% charged when shipped.
When charging series connected batteries, the voltage of the batteries or cells
with the highest initial state of charge will increase when reaching the fully
charged state, while other batteries or cells may lag behind. This may result in
over voltage on the batteries or cells with the highest initial state of charge,
and the charge process will be interrupted by the BMS.
We therefore recommend to fully charge new batteries before using
them in a series or series-parallel configuration.
This can best be done by individually charging the batteries at a low rate (C/20
or less) with a charger or power supply set at 14,2V. An absorption period of
several hours at 14,2V is recommended to fully balance the cells.
Parallel connecting the batteries and simultaneous charging is also possible.
In this case every battery must be protected by a fuse and the recommended
charge rate is again C/20 or less, with C being the capacity of one of the
paralleled batteries.
7