EPS Family
Electrical Power System (EPS)
The C3S EPS family delivers reliable, efficient and adaptable power solutions for CubeSats and small satellites. It is a flexible, scalable and modular power supply architecture designed to meet the needs of missions ranging from 3U CubeSats to SmallSats.
EPS 1000
Flight-proven power solution for CubeSat missions
- Flight heritage acquired in 2021 with the launch of RadCube
- Cold Redundancy and Graceful Degradation
- Single point failure tolerant
- Telemetry and telecommand communication with redundant CAN bus
- Temperature ranges:
circuits: -40°C to 80°C qualifiedbattery: 0°C to 50°C
- Autonomous LCL protection
- Autonomous Battery heater and balancing
- Two-level battery undervoltage protection
- Robust aluminium (T-7070) milling case
- Radiation tested (TID)
EPS family comparison
| Attributes | EPS 1000 | EPS 1200 | EPS 1300 | EPS 2000 |
|---|---|---|---|---|
| Size | CubeSat size | CubeSat size | CubeSat size | CubeSat, SmallSat size |
| Converter architecture | SEPIC + Buck | SEPIC + Buck | SEPIC + Buck | SEPIC + Buck |
| Input voltage range | 6–25 V (SA) | 6–25 V (SA) | 6–25 V (SA) | 6–25 V or 30–70 V (SA) |
| Output voltages | 9.9–12.3 V, 3.3 V, 5.1 V | 9.9–12.3 V, 3.3 V, 5.1 V | 9.9–12.3 V, 3.3 V, 5.1 V | 28 V unregulated, 12 V, 5 V |
| Output power | max. 70 W | max. 90 W | max. 100 W | max. 2 kW |
| Battery pack type | 18650 Li-Ion | 18650 Li-Ion | 21700 Li-Ion | 21700 Li-Ion |
| Battery pack size | 3S2P | 3S2P / 3S4P | 3S2P / 3S4P | 7S3P–7S16P; 8S3P–8S16P |
| Battery capacity | 58 Wh | 65–130 Wh | 116–233 Wh | 371–2080 Wh |
| Protections | UVLO, OVP, OCP, OTP, Battery UVP, heater and balancer |
UVLO, OVP, OCP, OTP, Battery UVP, heater and balancer |
UVLO, OVP, OCP, OTP, Battery UVP, heater and balancer |
UVLO, OVP, OCP, OTP, Battery UVP, heater and balancer |
| TRL | TRL 9 RadCube, VIREO, WREN-1 |
TRL 9 MAUVE, WISDOM |
TRL 5 ORIOLE |
TRL 7 |
| Type | Complete Power System for small satellites |
Complete Power System for small satellites |
Complete Power System for small satellites |
Complete Power System for small satellites |
Powering the next generation of SmallSat missions
EPS 2000
Power. Performance. Beyond the CubeSat.
EPS 2000 is C3S’s scalable power supply architecture developed for higher-performance small satellite missions.
Designed to support platforms from 12U CubeSats to SmallSats weighing several hundred kilograms, it provides a flexible and cost-effective power backbone for missions with increasing energy demand and system complexity.
Built on C3S’s flight heritage and in-house engineering expertise, EPS 2000 combines high-efficiency power conversion, protected power distribution and fault-tolerant operation.
Key technical parameters
MPPT channels: up to 20
LCL channels: up to 200
Battery capacity: up to 2 kWh
Primary bus: 6–70 V
Solar input: up to 2 kW
Output bus: 28 V unregulated
ANTENNA