Last summer I put 6 solar panels on the roof as part of a stand alone system to drive a swimming pool pump. The idea is that on sunny days, when I need the pump to circulate the water, it switches on when there is enough voltage coming from the batteries that are fed from the solar panels.
It works great on sunny days but I do have a manual override to the grid for other days.
The voltage is measured by the small black relay; a BEP Voltage sensitive relay. However, this switch engages at 26.8v and disengages at 25.6v. The Delta between the two is too small and it goes on and off far too frequently with risk of damaging the pump.
Someone told me that the Victron 12/1200 converter does exactly the same thing and I don’t really need the BEP voltage relay. Is this true and what are the voltages for engage and disengage?
Page 7 of the manual talks about the availability of the settings, but you’ll need a VE.Direct Bluetooth Dongle or a VE.Direct USB Interface to access the programming, in both cases using the VictronConnect app. Once you’re into it, the settings process is pretty straightforward once you have the dongle to access it.
Operating the relay too often can also damage it. They can weld shut. They are really only designed for alternator charging where the engine runs for a longer period and charges an auxiliary battery.