Is it okay to combine these batteries?

[KBurns]

I'm looking for a solution to use with the lv5048 inverter. When I discovered I needed more battery power to run the inverter, the first set of batteries were no longer available, so I bought the second set. Here are two different sets of batteries.

Two 24V A123 LFP Battery w/ BMS – (a123 8s5p)

Nominal Voltage: 26.4V
Voltage Range: 20V – 28.8V
Nominal Capacity: 2.45kWh (92.8Ah)
Configuration: 8S5P
Energy – 100% DOD, Nominal: 2.6 kWh
EV Energy – 80% DOD, Nominal: 2.1 kWh
Chemistry: LiFePO4 (LFP)
Cell Type: 20Ah Nanophosphate Cells
Cell Count: 40
BMS Specifications

Single cell overcharge protection voltage:
Min: 3.72V
Standard: 3.75V
Max: 3.78V
Single cell overcharge protection delay time:
Min: 0.6S
Standard: 1S
Max: 1.5S
Single cell overcharge recovery amperage:
Min: 3.5A
Standard: 3.6A
Max: 3.6A
Recharge current:
Max: 130A
Single-section equalization voltage:
Min: 3.55V
Standard: 3.6V
Max: 3.65V
Single-section equalization current:
Min: 35mA
Standard: 40mA
Max: 45mA
Single cell over-discharge protection voltage:
Min: 2.15V
Standard: 2.7V
Max: 2.8V
Single cell over-discharge protection delay time:
Min: .6S
Standard: 1S
Max:1.5S
Single cell over-discharge release amperage:
Max: 130A
Discharge protection current:
Min: 350A
Standard: 370A
Max: 390A
Charging high temperature protection:
Min: 85℃
Standard: 90℃
Max: 95℃
Physical Specifications
Length: 14.9in
Width: 9.6in
Height: 6.6in
Weight: 51lbs
Operational Specifications
Operational Temp Range: -22F...-30℃ ~ 131F...55℃
Storage Temp Range: -40℃...-40F ~ 140F...60℃

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Two 48V - LifePO4 - 120Ah - 6kWh

Kit 48V WOLF - LifePO4 - 120Ah - 6kWh - BigBattery.com

This 48V Kit uses LiFePO4/A123 Cells and also includes our newest BMS System with an Anderson SB175 Connection and also provides you with 120Ah & 6kWh.

bigbattery.com

Description:
A123 PERFORMANCE KIT: W. More Power! (6KWh!)
Using New LiFePO4 / A123 Cells, a 300A Fuse, Capable of a 2C Discharge rate – these two (2) Batteries in Series can power any 48V Solution.
It includes our newest BMS System, Thermal Management Solution, Triple-Safety Redundancy Features, and Anderson SB175 Connection.
Perfect for any 48V Lead-Acid Upgrade to maximize the performance of your intended application. At (24LB/kWh) this is the strongest, lightest and smallest 48V solution available.

Detailed Kit Specs:
Configuration: 2P
Voltage: 48V
Ah Capacity: 120Ah
kWh Capacity: 6kWh
Wh Capacity: 6000Wh

Kit Performance Specs:
Max Continuous Discharge Current: 130A
Max Continuous Power: 6500W
Max Discharge Peak Current: 252A (6 Seconds)

Voltage Range: 40 – 58.8V

Kit Charging Specs:
Suggested Charge Voltage: 58.8V
Max Charge Current : 80A

Temperature Parameters:
Charge Temp Range: 0°C – 65°C
Discharge Temp Range: -35°C – 65°C
Optimal Discharge Temp. Range: 15°C – 35°C
Storage Temp: -20°C – 50°C (Max 6 Months)

Safety Features:
BMS (Battery Management System)
Over Voltage, Under Voltage, Over-Current
(Thermal Management System), Safety Breaker (63A)

Kit Dimensions:
Kit Weight: 136 (LBS)
Length: 10 (in)
Width: 8.5 (in)
Height: 20 (in)

 

[CDell]

You might want to contact BigBattery. I have a similar situation. A 120ah and 100 ah. They said I can connect them in parallel. However the overall attitude on the forum seems to be never connect dissimilar batteries together.

 

[jpimlott]

I have a 180 map hour lfp pack in parallel with a 280 amp hour pack with their own BMSs
They have been that way now for about 90 cycles and are doing great. They are at 24 volt nominal.
The packs stay even on charge. If one pack is offline for a while and the pack is charged more or discharged more it is not
a problem. The low pack will take the charge and the high pack will take the load. This continues till the packs are even again.
No work needed.