Compact Electrical Power System 2
ISISPACE Group
Compact GaN-FET EPS for up to 3UXL CubeSats in 3 variants, with MPPT, battery heating, and 22.5–45 Wh energy storage.
Typed specifications131 values
Discloses 11 of 14 fields engineers filter by in this category (category median 7).
- Mass
- 184 g Type A, typ (179-189) · datasheet p.9 310 g Type B, typ (305-315) | 360 g Type C, typ (355-365) | 365 g max
- Envelope (L×W×H)
- 94 x 89 x 21.0 mm 4 cell battery pack, Type B and C · datasheet p.9 94 x 89 x 21.0 mm3 4 cell BP | 96 x 92 x 16 mm3 IU mainboard + DaughterBoard | 96 x 92 x 26.5 mm Type A, IU mainboard + 2 cell BP, excluding CSKB | 96 x 92 x 11.3 mm Type B, IU mainboard, excluding CSKB +1
- Outputs (as printed)
- 3.3V, 5V, VBAT datasheet p.2
- Power consumption
- 0.093 W Static (Idle) consumption · datasheet p.7
- Data interface
- I2C datasheet p.9 I2C standard-mode 100 kbit/s, fast-mode 400 kbit/s, 7-bit address…
- Operating temperature
- 10 °C min · With battery, charge · datasheet p.7 0 °C min · With battery, charge up to 800 mA | -20 °C min · With battery, discharge | -40 °C min · Without battery | 45 °C max · With battery, charge +7
- Unit type
- integrated EPS with battery PIU mainboard + Power Battery Pack (PBP-2S1P or PBP-4S1P) · datasheet p.4
- Board format
- PC/104 datasheet p.2
- Bus and outputs type
- hybrid (regulated rails + battery bus) 3 output rails including regulated 3.3V, 5V and unregulated b… · datasheet p.2
- Unregulated (battery) bus voltage
- 7.2 V 2S1P Power Battery Pack (PBP) · datasheet p.2 14.4 V 4S1P Power Battery Pack (PBP) | 7.2 V Type A, PBP-2S1P (2 series) battery pack | 14.4 V Type B and C, PBP-4S1P (4 series) battery pack
- Regulated output voltages
- Battery Voltage VD0 · datasheet p.7 5 V VD1 | 4.99 V VD1 output voltage unloaded, typ (min 4.91, max 5.07) | 3.3 V VD2 | 3.33 V VD2 output voltage unloaded, typ (min 3.26, max 3.41) +5
- Switchable outputs
- 8 DaughterBoard: eight more output bus channels (three on VD0, … · datasheet p.6 4 Type C (1+3) | 1 VD0 number of output channels, Type A and B | 4 VD1 number of output channels | 4 VD2 number of output channels +6
- Solar array inputs
- 3 number of MPPT inputs, Type A and B (3 independent MPPT contr… · datasheet p.8 2 two additional solar MPPT chains on the DaughterBoard, Type C | 5 Type C
- Solar input voltage window
- 3.5 V to 7.5 V Type A · datasheet p.8 3.5 V to 13.0 V Type B and C | 3.5–7.5 V functional voltage range for MPPT, Type A; maximum input volt… | 3.5–13 V functional voltage range for MPPT, Type B and C; maximum inpu…
- Max solar input power
- 2 W input current per channel · datasheet p.8
- Solar array regulation
- MPPT boost regulator with true maximum power point tracking, pertu… · datasheet p.5
- Integrated battery energy
- 28.8 Wh PBP-2S1P (2 series), 7.2V and 4A, Type A · datasheet p.2 57.6 Wh PBP-4S1P (4 series), 14.4V and 4A, Type B and C
- Protections
- Battery charge and discharge protection datasheet p.2 battery over-charge / over-discharge battery charge and discharge protection; over/under voltage t… | other battery charge/discharge protection, type not stated | under-voltage lockout charge load switch for charge current limiting, with under an… | short circuit complete output bus protection including short circuit and ba… +19
- Survival temperature
- -50 °C min · Storage temperature · datasheet p.7 -20 °C min · With battery, up to 1 month | -20 °C min · With battery, up to 1 year | -20 °C min · With battery, up to 3 months | 65 °C max · Storage temperature +4
- Flight heritage
- Design based on heritage from ICEPS1 design flown on PEASSS CubeSat (2016). ICEPS2, second generation, flown on the Hiber 1,2 CubeSats (2018) datasheet p.2
- Satellite class
- CubeSat 1U-3U sized platforms, up to 3U XL CubeSat missions · datasheet p.2
- Quasi-static load
- 10.8 g design qualification load static, three axes · datasheet p.2
- Max current per output
- 4.35 A maximum input current PDU section, typ (4.01-4.68) · datasheet p.7 4 A total for VD1 | 4 A total for VD2 | 4 A total for VD3 | 4 A total for VD4 +16
- Battery voltage range accepted
- 6 V Type A, Operating Voltage (software limits) · datasheet p.9 12 V Type B and C, Operating Voltage (software limits)
- Max battery charge current
- 1.78 A battery charge current, typ (1.60-1.96) · datasheet p.9
- MPPT
- yes hardware-based Maximum Power Point Tracking · datasheet p.2
- Max solar input current
- 2 A max · input current per channel; hardware limit set to 2.5 A · datasheet p.8
- Integrated battery cell configuration
- 2 in series (PBP-2S1P) for Type A; 4 in series (PBP-4S1P) for Type B and C; default 18650 cells, 3.2 Ah nominal datasheet p.8
- Battery heater control
- yes automatic integrated battery heater and thermostat control; m… · datasheet p.2
- Inhibit / RBF inputs
- 3 option for three separation switches (high side, low side, pl… · datasheet p.5
- Housekeeping telemetry
- MCU independent housekeeping telemetry of battery; voltage, current and power sensing of input and output RAIL; voltage, current and power sensing on MPPT input and output datasheet p.5
Each value is typed with its unit and measurement condition and cites the datasheet page it was taken from. Nothing is guessed: a field that is absent here has not been published by the manufacturer. machine-extracted ✓ checked by NewSpace Market ✓ manufacturer confirmed by the manufacturer.
As published by the supplier14 lines, in the manufacturer's own wording
- Mass — type a
- 184 ± 5 g
- Mass — type b
- 310 ± 5 g
- Mass — type c
- 360 ± 5 g
- Volume — type a
- 96 x 92 x 26.45 mm (PCB and top battery)
- Volume — type b
- 96 x 92 x 11.34 mm (PCB only)
- Operating temperature range
- -20°C to +70°C
- Energy storage — type a
- 22.5 Wh
- Energy storage — type b/c
- 45 Wh
- Output voltage domains
- VD0: Unregulated (1 ch); VD1: 5 V (4 ch); VD2: 3.3 V (4 ch)
- Main bus organisation
- Unregulated Bus
- Mppt channels
- 3 independent channels
- Interface
- CSKB compatible
- Communication interface
- I²C
- Protection features
- Emergency Low Power Mode, Hardware Supervisor with Watchdog, overcurrent/thermal limits per channel
About
The ISISPACE Compact Electrical Power System (ICEPS2) is ideal for up to 3UXL CubeSats. It features GaN-FETs for efficient solar power conversion, Maximum Power Point Tracking (MPPT), and integrated battery heating. ICEPS2 is available in three variants ensuring customised mission performance with reliable off-the-shelf efficiency.
Type A is the most compact variant (26.45 mm height, 22.5 Wh storage), while Types B and C provide 45 Wh storage with different PCB configurations. All variants feature 3 independent MPPT channels and are compatible with the CSKB (CubeSat Kit Bus) interface.
The system includes multiple voltage output domains: unregulated bus (VD0, 1 channel), 5V (VD1, 4 channels), and 3.3V (VD2, 4 channels). Protection features include Emergency Low Power Mode, hardware supervisor with watchdog, and overcurrent/thermal limits on all output channels. Communication via I²C.
Documentation
Need the full ICD, test reports or a specific revision? Ask the supplier directly.