Systems / Electrical Power System
Electrical Power System
Power generation, storage, and distribution for nanosatellites.
- Battery
- 45 Wh, 4-cell Li-ion
- Solar input
- 3x MPPT, 20 V max
- Output buses
- 3.3 V / 5 V / VBat
- Mass
- 760 g
Overview
The EOS Orbit EPS integrates solar power harvesting, battery management, and protected power distribution in a single PC-104 module. Three MPPT channels track solar input, a four-cell battery pack stores 45 Wh, and switched 3.3 V, 5 V, and battery outputs deliver power through e-fuses with per-channel current and voltage telemetry.
The module manages its own thermal and fault behavior. An automated heater holds battery temperature in cold conditions, and dedicated power-saving and emergency low-power modes shed loads as rail voltage falls, then recover the system once solar charging restores it.
Features
- 4 kill switches and 1 RBF pin for flight safety
- 3x MPPT solar inputs, 20 V / 2 A per channel
- Output buses: 3.3 V, 5 V, BCR adjustable to 16.8 V, battery raw
- E-fuse protection with per-channel power telemetry
- Automated battery heater control
- USB-C charging for ground operations
- CAN, UART, and I2C interfaces
- Optional stackable battery packs up to 8 A, RS-485, 6x GPIO load control
Specifications
Electrical
Interfaces
Physical
Qualification
Mechanical
Heritage
Flown on LOGSATS-2. Launched January 15, 2025, on a SpaceX Falcon 9. 440 days of orbital operations.
Commission this system
Write to contact@eosorbit.com with your mission parameters. The engineering team responds with configuration options, lead time, and test documentation.
Contact engineering →EOS-EPS-DSH-03 / datasheet on request