High-Power Electrical Power System Module (EPSM1)
Pumpkin, Inc.
Multi-channel space-grade EPS module with 6 MPPT solar inputs (max 480W total), dual Li-Ion battery ports, and configurable 3.3–28V output rails with >99% efficiency.
Technical specifications
- Solar Input Channels
- 6
- Max Total Solar Input
- 480 W
- MPPT Frequency
- 250 kHz
- Max Input per Channel
- 4 A at 28 V
- Battery Ports
- 2
- Battery Voltage
- 16.8 V Li-Ion
- Max Battery Charge Rate
- 6 A CC
- Max Battery Reserve per Port
- 112 W
- Output Rail 1
- 3.3 V / 5 A
- Output Rail 2
- 5 V / 5 A
- Output Rail 3
- 12 V / 8 A
- Output Rail 4
- 28 V / 8 A
- Total Output Power
- ~300 W
- Efficiency
- >99%
- Temperature Monitoring
- 3 internal + 8 external ports
- Control
- SEU-immune FPGA + SupMCU, SCPI over I2C
About
The Pumpkin EPSM1 is a high-power, multi-channel Electrical Power System Module designed for space applications. It accepts up to 6 solar array input channels with individual MPPT at 250 kHz, each rated for up to 4A at 28V maximum, supporting a total input of up to 480W. Two battery ports support 16.8V Li-Ion batteries with CC/CV charging up to 6A (112W reserve per battery).
Output rails are configurable: 3.3V/5A, 5V/5A, 12V/8A, and 28V/8A with approximately 300W total output. Power conversion efficiency exceeds 99%. Temperature is monitored on 3 internal and 8 external channels. The control logic uses an SEU-immune FPGA paired with a SupMCU co-processor, commanded via SCPI over I2C. The module integrates with the 104-pin CubeSat Kit bus.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.
