Freedom Won FW 12-40
The Freedom Won FW 12-40 is a battery pack with a nominal voltage of 12,8V, a rated capacity of 40, 512 Wh of energy, LiFePO4 cells, dimensions of 168x197x165, a continuous discharge of 40 A and a peak of 80 A (<3s).
Last updated: 20 October 2026
Battery and charging
- While the battery is charging
- CC at 0.2C to 14.6V, then at CV14.6V to charge current less than 0.02C
- Energy
- 512 Wh
- Voltage
- 12,8V
- Rated capacity
- 40
- Chemistry
- LiFePO4
- Rated charge cycles
- >2000 cycles at 0.2C 100% DoD
- Internal resistance
- ≤20
- Charges to
- 15.6V+/-0.2
- Treated as empty at
- 8
- Charging current
- 9
- Maximum continuous discharge
- 40A
- Charging efficiency
- 100% at 0.5C
- Peak discharge
- 80A (<3s)
- Highest charge current it will take
- 20
- How fast it loses charge sitting idle
- <3
“Charge Mode CC at 0.2C to 14.6V, then at CV14.6V to charge current less than 0.02C”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Energy [Wh] 96 128 256 512 1280 2560”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“All models operate at a nominal voltage of 12,8V, which suits the most commonly available residential battery inverters and is also matched to vehicle 12V alternators.”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Nominal Capacity [Ah] 7.5 10 20 40 100 200”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Cell Material LiFePO4 Prismatic LiFePO4 cell in 4S8P”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Cycle Life >2000 cycles at 0.2C 100% DoD”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Internal Resistance [mΩ] ≤60 ≤60 ≤50 ≤20 ≤20 ≤30”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Charge Cut-off Voltage [V] 15.6V+/-0.2 14.6”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Discharge Cut-off Voltage [V] 8 10.5”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Charge Current [A] 1.5 2 4 9 20 40”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Max. Continuous Current [A] 7.5A 10A 20A 40A 100A 100A”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Efficiency of Charge 100% at 0.5C”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Max. Pulse Current [A] 15A (<3s) 20A (<3s) 40A (<3s) 80A (<3s) 200A (<3s) 160A”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Max. Charge Current [A] 7.5 10 20 20 50 80”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Months Self Discharge [%] <3”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
Battery care and safety
- What the battery management system protects against
- Over charge protection, Over discharge protection, Over current protection, Short current protection, Balanced function, Temperature protection.
- Temperatures it may be charged in
- 0°C to 45°C (32F to 113F) at 60±25% Relative Humidity
- Temperatures it may be run in
- -20°C to 60°C (-4F to 140F) at 60±25% Relative Humidity
- Temperatures it may be stored in
- 0°C to 40°C (32F to 104F) 60±25% Relative Humidity
“Protection Function Over charge protection, Over discharge protection, Over current protection, Short current protection, Balanced function, Temperature protection.”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Charge Temperature [°C] 0°C to 45°C (32F to 113F) at 60±25% Relative Humidity”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Discharge Temperature [°C] -20°C to 60°C (-4F to 140F) at 60±25% Relative Humidity”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Storage Temperature [°C] 0°C to 40°C (32F to 104F) 60±25% Relative Humidity”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
Size and fit
- Weight
- 5.75 kg
- Overall dimensions
- 168x197x165
- Terminals
- M6
“Weight [kg] 1 1.6 3.1 5.75 13.5 24”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Dimensions - H x W x D [mm] 95x150x65 99x150x99 170x180x77 168x197x165 217x327x172 216x495x244”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
“Terminal T2 T2 M5 M6 M6 M8”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
Compatibility
- Connector
- 10
“Minimum Cable Connection Size [mm^2] 4 4 6 10 35 35”
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
Sources
- Archived document
Source: secondlife.freedomwon.co.za/wp-content/uploads/Freedom-Won-12V-Installation-Manual.pdf
Retrieved October 18, 2026