Flexible Charge Algorithm; Equalization Charging; Temperature Sensing; Internal Temperature Sensor - Victron energy MPPT 150/70 Manual

3.9.2. Flexible charge algorithm

The VictronConnect App allows selection of 8 pre-set charge algorithms, or alternatively the charge algorithm is fully
programmable. The charge voltages, stage duration and the charge current can be customized.
In addition to this, 8 pre-programmed algorithms can be set with a rotary switch.

3.9.3. Equalization charging

Some lead-acid battery types need a periodic equalization charge. During equalization the charge voltage will be increased above
the regular charge voltages to achieve cell balancing.
If an equalization charge is required it can be enabled using the VictronConnect App.

3.10. Temperature sensing

Temperature sensing allows for temperature compensated charging. The absorption and float charge voltages are adjusted based
on either the battery temperature (accessory needed) or otherwise on the solar charger internal temperature.
Temperature compensated battery charging is needed when charging lead-acid batteries in hot or cold environments.
The temperature compensation can be enabled or disabled in the solar charger settings and the amount of compensation, the
compensation coefficient (mV/°C), is adjustable.

3.10.1. Internal temperature sensor

The solar charger has a built-in internal temperature sensor.
The internal temperature is used to set the temperature compensated charge voltages. For this, the internal temperature when
the solar charger is "cold" is used. The solar charger is "cold" when there is only little current flowing into the battery. Be aware
that this is only an estimation of the ambient and the battery temperature. Should a more accurate battery temperate be needed,
consider using an external battery temperature sensor, see chapter

External temperature and voltage sensor

The internal temperature sensor is also used to determine if the solar charger is overheated.
3.10.2. External temperature and voltage sensor
The Smart Battery Sense is a wireless battery voltage and temperature sensor and can be used with the solar charger. It
measures the battery temperature and the battery voltage and sends this via Bluetooth to the solar charger.
The solar charger uses the Smart Battery Sense measurements for:
• Temperature compensated charging using the actual battery temperature, rather than the solar charger's internal temperature.
An accurate battery temperature measurement will improve charging efficiency and prolong the life of lead-acid batteries.
• Voltage compensation. The charge voltage is increased to compensate in case there is a voltage drop over the battery cables
during high current charging.
The solar charger communicates with the Smart Battery Sense via Bluetooth using a VE.Smart Network. For more detail on the
VE.Smart network see the VE.Smart Networking
Alternatively, a VE.Smart Network that measures battery temperature and battery voltage, can also be set up between a solar
charger and a BMV-712 Smart or
without the need for a Smart Battery Sense.
Note that a VE.Smart Network can only be set up if the solar charger is capable of Bluetooth communication,
has Bluetooth enabled or is equipped with a VE.Direct Bluetooth Smart dongle.
Page 7
MPPT solar charger manual
[7]. The temperature compensation range is 6°C to 40°C (39°F to 104°F).
manual.
SmartShunt battery monitor that has been equipped with a
External temperature and voltage sensor
Temperature sensor for
[7].
BMV,
Features