Fortress Power LFP-5K-48V
The Fortress Power LFP-5K-48V is a battery pack with a nominal voltage of 51.2 (48), a nominal capacity of 100, Lithium Ferro Phosphate cells, a weight of 62.5 kg and an ingress rating of IP53 (indoor unit).
Last updated: 28 October 2026
Battery and charging
- Energy (kilowatt-hours)
- 5.12 kWh
- Voltage
- 51.2 (48)
- Chemistry
- Lithium Ferro Phosphate
- Rated charge cycles
- 6000 @ 80% DoD
- Nominal capacity
- 100
- Maximum continuous discharge
- 80
- Peak discharge
- 180
- Highest charge current it will take
- 80
- Efficiency
- >98%
- Working voltage range
- 44-58.4
Row from the maker’s page: “Total Energy [kWh]” | “5.12”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Nominal Voltage [V]” | “51.2 (48)”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
“The advanced Lithium Ferro Phosphate (LFP) technology operates a wider temperature range”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Life Cycle” | “6000 @ 80% DoD”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Capacity [Ah]” | “100”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Max. Discharge Current (Continuous) [A]” | “80”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Max. Plus Current for 5Sec [A]” | “180”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Max. Charge Current (Continuous) [A]” | “80”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Efficiency” | “>98%”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Voltage Range [V]” | “44-58.4”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Battery care and safety
- Ingress protection
- IP53 (indoor unit)
- Temperatures it may be charged in
- 32 F to 113 F (0 °C to 55°C)
- Temperatures it may be run in
- 32 F to 140 F (0 °C to 65°C)
- Temperatures it may be stored in
- 41 F to 113 F (5°C to 55°C)
Row from the maker’s page: “Enclosure Protection Rating” | “IP53 (indoor unit)”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Charge temperature [F/°C]” | “32 F to 113 F (0 °C to 55°C)”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Discharge temperature [F/°C]” | “32 F to 140 F (0 °C to 65°C)”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Recommend Storage Temperature [F/°C]” | “41 F to 113 F (5°C to 55°C)”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Size and fit
- Weight
- 62.5 kg
- Overall dimensions
- 20" x 9" x 26.5" (510 mm x 230mm x 674 mm)
- Series and parallel connection
- Maximum 3 in parallel
Row from the maker’s page: “Weight [lbs/kg]” | “138 lbs (62.5 kg)”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Dimension [WxDxH, inch/mm]” | “20" x 9" x 26.5" (510 mm x 230mm x 674 mm)”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Row from the maker’s page: “Scalability” | “Maximum 3 in parallel”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Certification claims
- Standard certified to
- UL 1642, CE
Row from the maker’s page: “Certificates” | “UL 1642, CE”
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Sources
- Archived document
Source: fortresspower.com/download/947/legacy-data-sheets/47956/fortress-power-lfp-05-datasheet.pdf
Retrieved October 28, 2026