Note from a customer:
Thought this might be of some interest to you that these units can't be put in series and will cause transistors to burn out, unless you modify BMS with contactor/relay as the transistor are only designed for 24v setup.
Used SimplyPhi Lithium Ferro Phosphate battery pack. This listing is just for the battery pack but we do have another that includes a UPS to use with the cell pack - check our other listings.
The battery characteristics are:
24V Nominal voltage (drop in replacement for lead acid)
60A Max discharge current
Deep cycle capable
We don't normally sell used cells, but as these have a long service life and are essentially charge cycle impervious, they are still good and we can back with a 3 month warranty. Each will be tested individually with a UPS and cycled a few times so that we can determine remaining capacity. We will require over 2 hours runtime at 800 watts. The first few that we have tested have all cleared 2 hours 35 minutes.
These are a well packaged Li-Fe-P battery pack system that is long life, capable of both high cyclic use (10K cycles rated) and deep discharge applications. They are light for the kWh capacity they provide. The lithium composition is the most environmentally benign available. The long life design, low self discharge and high efficiency commend it for power storage purposes. They are designed as a drop in replacement for 24V lead acid systems.
Nominal DC voltage 25.6 Volts
DC voltage range 20 -> 28.8
Capacity 105 AH Ratid kWh
Capacity at C/2 Discharge 2.7 kWh
Max Discharge Current 60A (10 min duration)
Max Cont. Discharge current 45A
Max Cont. Charge current 45A
Depth of discharge - up to 100%
Operating efficiency 98%
Self discharge rate < 1% per month
Cycle life 10,000 hours
Memory effect - none
Design life 10 years+
Operating temp range -20 to 60 deg C
Charge temp 0 to 49 deg C