Lithium 48v SOK 100ah battery with EPever 48V Kva system

[Kereru02]

Hi there first time posting. We have an EPever 5kva hybrid inverter model# UP5000-M10342(PK),which we run 8x200ah gel batteries off but are now wanting to change to lithium. Question is can we run the batteries from our existing EPever system and if so how many batteries would we need ,we’ve been told 4,3 or 2(by 3 people) we are very solar conscious (led lights,only use energy rated appliances,gas oven and cooktop,log fire) we do have starlink internet which is on 24/7,and swan security cameras. We have a 150 watt smart tv which I would say runs anywhere from 2 hours a day up to 8(on the weekends)our water pump is 250watts and is probably used 1 hour a day. Are 2 batteries enough? Also we have 2 different wattage solar arrays (because of an accident) if we replaced them with all the same panel(watts) would we need another MPPT. And how many more panels could we add to the array.
Attached are photos of what we have now.
It was suggested we get a MPPT for the solar array,that’s about $700, but if we buy the same panels that we have for only $300 each wouldn’t that be a better option and the buy a Victron BMV-712 Battery Monitor to monitor batteries?

 

[sunshine_eggo]

Your unit has a 100A MPPT built in. That should be good for about 6000W of attached PV.

The Tongwei and Trina panels a decent match as their Vmp differs by less than 10%. Strings of Trina panels could be placed in parallel with strings of Tongwei panels. If you put them in series, the Tongwei will operate 10A Imp instead of 13.1A Imp - about 24% reduced power.

It's not clear why you're looking for another MPPT. You haven't indicated your existing array size.

Add up your daily kWh usage. You can size your PV and battery on that basis. If your existing battery capacity meets your needs, replacing with the same capacity of lithium should suffice.

You can likely use lithium. Can I assume you've consulted your manual?

The use of a Victron shunt for monitoring is always a good plan.

 

[Kereru02]

Your unit has a 100A MPPT built in. That should be good for about 6000W of attached PV.

The Tongwei and Trina panels a decent match as their Vmp differs by less than 10%. Strings of Trina panels could be placed in parallel with strings of Tongwei panels. If you put them in series, the Tongwei will operate 10A Imp instead of 13.1A Imp - about 24% reduced power.

It's not clear why you're looking for another MPPT. You haven't indicated your existing array size.

Add up your daily kWh usage. You can size your PV and battery on that basis. If your existing battery capacity meets your needs, replacing with the same capacity of lithium should suffice.

You can likely use lithium. Can I assume you've consulted your manual?

The use of a Victron shunt for monitoring is always a good plan.

We have 4 panels of each solar array

 

[sunshine_eggo]

4S Trina in parallel with 4S Tongwei should work well.