Electrical power systems (EPS) > Electrical Power System 1.0 (power 175 W)
Key highlights
The Kongsberg NanoAvionics Electrical Power System (EPS) manages power collection and distribution a the satellite, with an integrated Battery Management System (BMS). All subsystem and payload power supply is controlled via the EPS and all of the output channels can be switched on and off autonomously or by ground command. The EPS stores generated energy in onboard Lithium-Ion batteries. To ensure a safe battery working environment, the EPS is integrated with battery heaters and battery balancing functions.
The 1st and 2nd generation Electrical Power Systems (EPS 1.0 and EPS 2.0) are designed to meet nano- and microsatellite market demand, requiring high power in a small size.
The EPS 1.0 can be paired with additional accessory boards, further expanding the capabilities of the EPS:
- EPS Output Channel Expander (OCE)
- EPS High Voltage Expander (HVE)
Key specifications:
- MPPT converter efficiency: up to 96 %
- Output converter efficiency: up to 96 %
- Four regulated voltage rails: 3.3 V; 5 V; Configurable 3 – 12 V.
- Unregulated voltage rail: 6 V – 8.4 V.
Inputs:
- Four MPPT converters (8 solar panel input channels) with integrated ideal blocking diodes
- Solar panel voltage range: 2.6 – 12 V
- Max input power per MPPT converter: 25 W
Outputs:
- Up to 18 output channels (configurable voltage rail)
- Typical output channel current: 3.13 A (configurable)
- Max 3.3 V Output converter power: 20 W
- Max 5 V Output converter power: 20 W
- Max 3-18 V Output converter power: 20 W
Configuration Options:
- Power Supply System EPS 2S1P Configuration
- Max Unregulated Output Power 25 W
- Max Charging Power 10 W”
- Power Supply System EPS 2S2P Configuration
- Max Unregulated Output Power 50 W
- Max Charging Power 20 W”
- Power Supply System EPS 2S3P Configuration
- Max Unregulated Output Power 75 W
- Max Charging Power 30 W”
- Power Supply System EPS 2S4P Configuration
- Max Unregulated Output Power 100 W
- Max Charging Power 40 W”
- Power Supply System EPS 2S5P Configuration
- Max Unregulated Output Power 125 W
- Max Charging Power 50 W”
- Power Supply System EPS 2S6P Configuration
- Max Unregulated Output Power 150 W
- Max Charging Power 60 W”
- Power Supply System EPS 2S7P Configuration
- Max Unregulated Output Power 175 W
- Max Charging Power 70 W”
Key features
General features:
- Wide range solar panel input voltages
- Four MPPT converters with 8 solar panel input channels
- Four output converters with 18 output channels
- High output power (up to 175 W)
- Integrated ideal diodes
- On-board Lithium-Ion battery pack
- Integrated battery balancing
- On-board battery heaters
- Overcurrent protection, battery undervoltage and overvoltage safety features
- External battery pack provides up to 161 Wh battery capacity
- Current, voltage, and temperature logging
- Software configurable output channel overcurrent protection
- Implemented EPS watchdog system
- Supports CAN communication interface with CSP protocol
- EPS configuration through USB interface
- ISS Kill Switch option
- Always-ON Real Time Clock
- Thermal vacuum tested
- PC/104 standard
- IPC-A-610 Class 3 assembly
EPS OCE features:
- Additional 4 DC/DC converters and 8 output channels in total
- Four output converters can be configured to user-defined output voltage (3 – 12 V)
- Current, voltage and temperature logging
- Software configurable output channel overcurrent protection
- PC/104 standard
- IPC-A-610 Class 3 assembly
EPS HVE features:
- Two independent 100 W DC/DC boost converters
- Two output converters can be configured to user defined output voltage (12 V – 28 V)
- IPC-A-610 Class 3 assembly
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Last updated: 2025-07-23
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