Odd question I know but trying to find a solution to charge an off grid power bank with excess solar energy
In my house i have 4kw solar setup with a solar diverter to heat hot water when excess solar energy is being created
Can I use that output of this solar diverter which will vary in watts @240v into a 250/100 charge controller to then charge a power bank? When the power bank is full I could relay back the power to the immersion heater?
uk power is 220-240 so in theory the 250max input and varying watts would work?
my other issue is the battery bank will be a li-ion chemistry and I'm not sure if the charging can be manually set to accommodate the CC-CV charging profile as i see it only supports LifePo4
as uk power does flux a little I would prob need some thing to keep the V down below 250V but that shouldn't be to hard to work out.
Any other suggestions out there? cant find any products that seem to give me any other solutions where both hot water and battery charging can be supported in the same device with the battery being offgrid. eg not part of the feed in
An example use could be to store power while there is excess and then heat the water when the water needs heating preventing the use of gas needed if some one empties the hot water tank while there is no solar. Priority of hot v storing energy would have to be worked out eg heat water first then store after that or store then heat water for example.