Any ideas for smartly combining these two solar systems?

[marcfest]

I have the two solar systems ("A" and "B") whose specs are shown below.

I wonder what the smartest way might be to integrate the Bluetti EP unit from system B with system A (without using the Bluetti panels from System B because they are just "splash proof" but not totally rain proof so I only bring them out in emergencies).

My primary goal is enhancing the battery capacity of system A.

Any advice?

Thanks a thousand!

Marc

System A

250V / 100A Victron charge controller
4000W Giandel inverter
4 Battleborn 100Ah / 12V batteries in 2S2P 24V config

10 Mission Solar panels in 5S2P config:
Watts (STC) 345W
Max Power Voltage (VMPP) 33.37 V
Max Power Current (IMPP) 10.34 A
Open Circuit Voltage (VOC) 41.0 V
Short Circuit Current (ISC) 10.92 A
Max System Voltage (UL) DC 1000 V


System B

Bluetti 500 EP Solar Power Generator
2,000W
5,100Wh
PV input 1200W Max, 55-145VDC, 20A
AC Input: 600W Max, 100-264VAC
AC Output: 220-240VAC*3, 100-120VAC*4
In-grid UPS Mode&Flexible UPS Mode(24/7)
More: https://www.bluettipower.com/products/ep500-2000w-5100wh-solar-generator

4 BLUETTI PV350 Solar Panels
Used in 2S2P config
Each 350W
Max. Power Voltage (Vmp): 37.5V
Current at Max Power (Imp): 9.2A
Open Circuit Voltage (voc): 46.5V
Short Circuit Current (Isc): 10.8A

 

[Lilikoi_Heavy_Industries]

DC/DC Charger that kicks on in the evening and charges battery A from battery B? Victron Orion maybe, I'm not sure what your battery bank voltages are?

 

[crossy]

I'd be popping the back off the 500EP and having a look what format the batteries are in. If it's 24V then you're good to go with a simple parallel connection to your existing system (via the BMS in the 500EP of course).

Otherwise maybe sell the beast as-is and get some more Battleborns.

 

[12VoltInstalls]

not sure what your battery bank voltages are

4 Battleborn 100Ah / 12V batteries in 2S2P 24V

I’d sell off the blewetthi and add normal batteries too. That’s going to be the biggest gain for the buck imho - although battleb’s are expensive enough to not offset in a spending less scenario

 

[marcfest]

Thanks for all the suggestions. I might just get more Battleborns and keep the Bluetti as a UPS for when the grid is available and as an additional solar backup in case of a prolonged outage.