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Hello, we have fitted lithium batteries 2x220 ah 24volt . We are using a multiplus 3000 charger inverter and have 2x100 watt solars coming to a mppt 70/15 blue solar charger. How can we manually change the 70/15 over to the lithium setting. Cannot use Victron connect on it. Many thanks.
Is there a reason why Victron Connect doesn't work?
@Sylvana your 70-15 mppt only has 1 charge profile that suits lead batteries.
That said, the 28.8v bulk/absorption voltage is probably ok for most lithium.
Also, while the float voltage is a little high at 27.6v, there is only limited sun hours that the mppt can hold that voltage. (if ever given your small array)
The only major problem comes in with mppt temperature compensation. At temps below 25c, the mppt will move the charge voltages up. Likewise at higher than 25c temps, the mpptwill lower the move the charge voltages down.
