Weco 4K5 ULTRA-LV
The Weco 4K5 ULTRA-LV is a battery pack with a nominal voltage of 51.2 V, a capacity of 100 Ah, LiFePO4 cells, certification to CE / IEC 62619 / IEC62040, dimensions of 644.5 × 105 × 553 mm, up to 15 Batteries in Parallel Low Voltage and a weight of 45 kg.
Last updated: 1 November 2026
Battery and charging
- Capacity (amp-hours)
- 100 Ah
- Energy (kilowatt-hours)
- 5.1 kWh
- Voltage
- 51.2 V
- Chemistry
- LiFePO4
- Maximum discharge current
- 100 A (1C)
- Mounting position
- Wall Mounted / Stacked
- Series and parallel limit
- Up to 15 Batteries in Parallel Low Voltage
- Continuous discharge current
- 50 A
- Maximum charge current, as the maker labels it
- 100 A (1C)
Row from the maker’s page: “Cell Capacity” | “100 Ah”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Row from the maker’s page: “Rated Capacity” | “5.1 kWh”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Row from the maker’s page: “Rated Voltage” | “51.2 V”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Row from the maker’s page: “Cell Type” | “LiFePO4”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Row from the maker’s page: “Max. Discharge Current” | “100 A (1C)”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Row from the maker’s page: “Installation” | “Wall Mounted / Stacked”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Row from the maker’s page: “Parallel Connection” | “Up to 15 Batteries in Parallel Low Voltage”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Row from the maker’s page: “Standard Discharge Current” | “50 A”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Row from the maker’s page: “Max. Charge Current” | “100 A (1C)”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Battery care and safety
- Ingress protection
- IP54
- Temperatures it may be charged in
- -5 °C ~ + 55 °C
- Temperatures it may be run in
- -20 °C ~ + 55 °C
Row from the maker’s page: “IP Rating” | “IP54”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Row from the maker’s page: “Charge Temperature Range” | “-5 °C ~ + 55 °C”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Row from the maker’s page: “Discharge Temperature Range” | “-20 °C ~ + 55 °C”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Size and fit
- Weight
- 45 kg
- Overall dimensions
- 644.5 × 105 × 553 mm
Row from the maker’s page: “Weight” | “45 kg”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Row from the maker’s page: “Dimensions (W × D × H) (mm)” | “644.5 × 105 × 553”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Compatibility
- Battery voltage window
- 46.5 ~ 58.4 V
- Communication protocol
- 2 × CAN2.0 1 × RS232
Row from the maker’s page: “Voltage Range” | “46.5 ~ 58.4 V”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Row from the maker’s page: “Communication Interface” | “2 × CAN2.0 1 × RS232”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Certification claims
- Standard certified to
- CE / IEC 62619 / IEC62040
Row from the maker’s page: “Certificates” | “CE / IEC 62619 / IEC62040”
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Sources
- Archived document
Source: web.archive.org/web/20241117201616id_/https://wecobatteries.com/wp-content/uploads/2024/06/03-Brochure_4k5-Ultra-1.pdf
Retrieved November 1, 2026