Key highlights

The EnduroSat SmallSat EPS is a modular electrical power system sized for serious small satellite missions, handling up to 7 kW of continuous power with 2 kW of peak solar input. Each satellite battery pack stores 1.1 kWh, and the plug-and-play architecture lets integrators stack up to three packs to scale energy storage, input capacity and output power to the mission profile.

Power distribution is built around a 30–50 V system bus (vBatt) backed by regulated 12 V and 28 V buses, with an optional payload power conditioning unit adding 3.3 V, 5 V and further regulated rails up to 30 V on request. Output headroom is substantial – up to 125 A continuous on the 28 V channel and 107 A on the battery bus per pack (215 A with two packs) – giving high-power payloads such as SAR or propulsion the current they need.

Designed for a 5–7 year operational life in LEO, this satellite EPS pairs full output protections (overvoltage, undervoltage and overcurrent on every channel) with independent command and control over two redundant CAN FD interfaces using CSP 2.0. Four solar array input channels (expandable to eight) accept up to 70 V open-circuit and 10 A short-circuit per channel, and deployment plus Remove Before Flight switches are integrated for streamlined launch operations.

Applications

Primary electrical power system for SmallSat and microsatellite platforms
High-power payload missions (SAR, electric propulsion, high-rate communications) needing kW-class distribution
ESPA-class and FRAME-type satellite buses with 30-50 V power architectures
Multi-year LEO missions requiring 5-7 year battery design life
Scalable constellations standardizing on a modular, stackable power subsystem

Key features

kW-class power handling:
Up to 7 kW maximum continuous power with 2 kW peak input power.
High-capacity storage:
1.1 kWh (1100 Wh) per battery pack, stackable up to 3 packs.
Modular architecture:
Plug-and-play stacking scales capacity and input/output power to mission needs.
Long design life:
Battery system designed for a 5-7 year lifespan in LEO.
Flexible solar input:
4 standard input channels (8 upon request), up to 70 V OC and 10 A SC per channel.
High-voltage system bus:
30-50 V vBatt channel with up to 107 A continuous (1 pack) or 215 A (2 packs).
Regulated distribution:
12 V and 28 V regulated buses; up to 14 A on 12 V and 125 A on 28 V channels.
Custom payload rails:
PPCU option adds 3.3 V, 5 V and other regulated values up to 30 V on request.
Redundant control:
Independent command and control over 2x redundant CAN FD interfaces; CSP 2.0 over CAN.
Full output protection:
Overvoltage, undervoltage and overcurrent protection on all outputs.
Launch-ready switching:
Integrated deployment and Remove Before Flight (RBF) switches.
Two delivered configurations:
19.5 kg base (1 pack + 1 PDU) or 32.5 kg advanced (2 packs + 1 PDU).

Testing & qualification

Compliant with the CubeSat standard.

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Last updated: 2026-06-04