Victron energy MPPT 150/70 Manual page 26

• For all VRLA battery presets and for some flooded batteries presets, the automatic equalization stage ends when the voltage
limit (maxV) has been reached, or after a period equal to absorption time/8, whichever comes first.
• For all tubular plate battery presets and for user-defined battery types, the automatic equalization stage ends when the time
has reached absorption time/2.
• For the lithium battery preset, equalization is not available.
• When an automatic equalization stage has not been completed within one day, it will not resume the next day. The next
equalization surge will take place according to the interval as set in the "Auto Equalization" setting.
Equalisation stop mode
This setting determines when the equalisation stage should end:
• Automatic: Equalization stops if the battery voltage has reached the equalisation voltage
• Fixed time: Equalization stops when the time has reached the time as set in the "Maximum equalization duration" setting.
Maximum equalization duration
This setting sets the maximum time that the equalization stage will last.
Tail current
This setting sets the current threshold to end the absorption stage before the maximum absorption time has been reached. If the
charge current drops below the set tail current, for one minute, the absorption stage will end and the float stage will start. This
setting can be disabled by setting it to zero.
Temperature compensation
This setting sets the temperature compensation coefficient that is needed for temperature compensated charging.
Many battery types require a lower charge voltage in warm operating conditions and a higher charge voltage in cold operating
conditions. The configured coefficient is in mV per degree Celsius for the whole battery bank, not per cell. The base temperature
for the compensation is 25°C (77°F).
The chart below indicates the absorption and float charge voltage behaviour at different temperatures. The graph displays the
temperature compensation for a 12V system and uses a -16mV/°C temperature compensation coefficient. For a 24V system
multiply the voltages by 2 and for a 48V system multiply by 4.
By default, the solar charger uses its internal temperature for battery temperature compensated charging. An internal temperature
reading is taken in the morning and then again when the solar charger has been idle for at least one hour, for example when the
charger is not actively charging a battery or supplying a load.
When the solar charger is part of a VE.Smart Network and receives a battery temperature reading from a BatterySense or a
battery monitor with temperature sensor, the actual battery temperature will be used for temperature compensated charging
throughout the day.
Low temperature cut-off
This setting is used to prevent damage to a lithium battery by disabling charging at low temperatures.
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MPPT solar charger manual
Temperature compensated charge graph
Configuration and settings