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ISISPACE Modular Electrical Power System

Compiled from public sources. Checked on 2026-11-07. Not independently verified by ISISPACE.

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ISISPACE's second-generation modular electrical power system is a distributed small-satellite EPS with power conditioning, battery pack, battery unit, and distribution modules.

The ISISPACE Modular Electrical Power System (IMEPS2) is a configurable modular electrical power system (EPS) for CubeSats of 3U and larger. It is assembled from four module types: a Power Conditioning Unit (PCU), Power Battery Unit (PBU), Power Battery Pack (PBP) and Power Distribution Unit (PDU).[1] Datasheet issue 2.0 is dated 30 July 2024. IMEPS2 first flew in 2020 and derives from the earlier ICEPS1 and IMEPS1 designs.[1]

Storage scales in 45 Wh pack increments, with up to three packs per PBU and parallel modules for redundancy.[1] The PBU provides closed-loop heating and balancing for each battery pack, configurable in orbit.[1] Each pack uses four 3200 mAh lithium-ion cells in series at 14.4 V nominal.[1]

The published rail limits are 12.8-16 V and approximately 12 A. The PDU provides four output channels each at the VD0, VD1 and VD2 voltage domains, and optional daughterboard domains can be added.[1] Each channel delivers up to 3 A. VD1 and VD2 each allow 4 A continuous and 6 A peak in total.[1] Each PCU supplies four 39 W maximum power point tracking (MPPT) inputs.[1]

The operating temperature range is -40 to +70 C. Interfaces include Inter-Integrated Circuit (I2C), universal asynchronous receiver-transmitter (UART), optional Serial Peripheral Interface (SPI) and single-wire commands.[1] Module masses are 58 g for the PCU, 48.7 g for the PBU and 252 g for the PBP. With the full CubeSat Kit Bus (CSKB) fitted, the PDU has a mass of 51.6 g top-mounted or 57.4 g bottom-mounted.[1] ISISPACE declares IMEPS2 interoperable with its solar panels, onboard computer and radios.[1]

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ISISPACE Modular Electrical Power System. EO-Atlas, SpectraWorks B.V., last reviewed 2026-11-07. https://eo-atlas.org/products/component/isispace-modular-electrical-power-system (CC BY 4.0)

BibTeX

@misc{eoatlas:products:component:isispace-modular-electrical-power-system,
  title = {ISISPACE Modular Electrical Power System},
  author = {{EO-Atlas}},
  publisher = {SpectraWorks B.V.},
  year = {2026},
  note = {Last reviewed 2026-11-07. CC BY 4.0},
  url = {https://eo-atlas.org/products/component/isispace-modular-electrical-power-system}
}