EPS Family
Electrical Power System (EPS)
The C3S EPS family provides a scalable, modular power architecture for a wide range of satellite platforms. From 3U CubeSats to 16U platforms and SmallSats up to 100 kg, the C3S EPS family delivers reliable and efficient power solutions for missions with different spacecraft sizes and power requirements.
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