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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?
Blue solar has no bluetooth, only smartsolar. So unless you have the BT dongle or VEdirect cable you can't use Victronconnect
Use the small dial to set (if not overriden by the settings). Best is to get a VE Dongle or VEDirect cable, also allows you to update the unit. Either buy or find a dealer near you who can do that for you (since it's just a change which needs to be done once)
@DJSmiley unfortunately the bluesolar 70-15 is not compatible with the Bluetooth dongle.
@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.
