9 Battery Management SMA Solar Technology AG
128 SI80H-60H-OffGrid-IA-en-11 Installation Manual
To protect or maintain the battery on off-grid systems that are used seasonally, you can start
equalisation charge manually (see the operating manual of the off-grid inverter).
9.2.3 Automatic Temperature Compensation
The charging capability of the battery is dependent on temperature. To prevent overcharging and
insufficient charging of the battery, battery management has an automatic temperature compensation
function.
For temperatures over 20°C, battery management increases the charging voltage. For temperatures
under 20°C, battery management reduces the charging voltage.
External charging device
An external charging device or a charge controller can also carry out equalisation charge of
the battery.
The off-grid inverter treats equalisation charge by an external charge controller as equivalent
to a equalisation charge that it carries out itself.
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