Hi, I wonder what device I have to use to charge a Li-Ion 48V battery with a 20V solar panel ? MPPT for 48V battery seems to be used only if the solar panel voltage is higher than the battery voltage. Thanks in advance

[image] Yhello: at device I have to use to charge a Li-Ion 48V battery with a 20V solar panel ? MPPT for 48V battery seems to be used only if the solar panel voltage is higher than the battery voltage. Thanks in advance Don’t think Victron makes anything for this situation. However, there …

Step up dc DC as suggested or put PV panel in serial with battery and use it as input to MPPT (75V or 100V voltage rated) to charge same battery back

Interesting, thanks. But, the tuning of battery charge voltage seems not very precise and it is not digitally connected to be able to monitore the charge power

[image] Yhello: But, the tuning of battery charge voltage seems not very precise and it is not digitally connected to be able to monitore the charge power You are quite correct, it is really meant for infrequent use in a pinch, not as part of a real system.

Charge a 48V battery with a 20V solar panel

DIY

ricardocello (Rick) 10 January 2025 19:27 6

You are quite correct, it is really meant for infrequent use in a pinch, not as part of a real system.

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Charge a 48V battery with a 20V solar panel

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