Temperature Difference Between Solar Charger And Battery; Insufficient Solar - Victron energy SmartSolar MPPT 100/30 Manual

1. Measure the voltage on the battery terminals of the solar charger using the VictronConnect App or a multi meter.
2. Measure the battery voltage on the terminals of the battery using a multi meter.
3. Compare the two voltages to see if there is a voltage difference.

9.3.5. Temperature difference between solar charger and battery

It is important that the ambient temperatures of the battery and the controller are equal if the solar charger is not receiving battery
temperature data.
This chapter does not apply if the solar charger is connected to a VE.Smart Network with a battery
temperature measurement or is equipped with a temperature sensor (MPPT RS).
The solar charger will measure ambient temperature at the beginning of the day, as soon as power is generated by the solar
array.
It will temperature compensate the charge voltage according to this temperature measurement.
Once the solar charger goes into the float stage it will measure the ambient temperature again and will use that measurement to
adjust the voltages again.
If there are large ambient temperature difference between solar charger and battery, the battery will be charged at the wrong
voltages.
An example of this is if the solar charger is located near a window in the sun, and the batteries are located on a cold concrete
floor in the shade.
Always make sure that the ambient conditions are equal for both the solar charger and the battery.

9.3.6. Insufficient solar

Check if the solar charger reaches the float charge stage each day.
To investigate look at the history tab in the VictronConnect App. The histogram displays how long the batteries have been
charged in the Bulk, Absorption and Float stage each day, for the last 30 days. If you click on one of the histogram columns you
will see a breakdown of the charge stages.
You can use the charge times to see if the PV array is properly sized for your requirements. A system which never reaches the
float stage could have the following issues:
• Not enough solar panels
• Too much load
• A problem with the array causing it to have a reduced power output.
• For more potential reasons see paragraph: "PV power or yield less than expected"
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MPPT solar charger manual
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