EPS-1000 Electrical Power System
C3S LLC
Complete CubeSat EPS with 6 independent MPPT channels, 58 Wh Li-ion battery pack, and 12 LCL outputs providing 3.3 V, 5 V, and unregulated buses. Flight-proven on RadCube (2021).
Technical specifications
- Max Solar Input Power
- 46.9 W (50 W rated)
- MPPT Channels
- 6 independent, programmable 6-25 V
- MPPT Efficiency
- 65-89%
- Battery Chemistry
- Li-ion, 2P3S (6 cells)
- Battery Capacity
- 5.4 Ah / 58.3 Wh (90% SOC)
- Max Battery Current
- 5 A charge/discharge
- LCL Outputs
- 12
- Power Buses
- 3.3 V @ 4 A, 5 V @ 4 A, 9.9-12.6 V @ 5 A
- Command Interface
- Redundant CAN bus
- Mass
- 811 g
- Dimensions
- 88.5 x 96 x 88.1 mm
- Operating Temperature
- -40 to +80 deg C (electronics); 0 to +50 deg C (battery)
About
The C3S EPS-1000 is a complete electrical power supply system for CubeSats with flight heritage on the RadCube mission (launched 2021), which demonstrated 10 kRAD TID in mission. It provides 6 independent MPPT channels with programmable 6-25 V solar voltage, a 58 Wh Li-ion battery pack (2P3S configuration, 6 cells), and 12 load control logic outputs. Three regulated power buses (3.3 V, 5 V at 4 A each, plus unregulated 9.9-12.6 V at 5 A) serve satellite subsystems. Command interface uses redundant CAN bus.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.
