Image of Soltrac GmbH - Si-Core Modules – silicon solar cell string modules, 1–12 cells on the satsearch marketplace

Key highlights

Scalable length: 1–12 cells in series, 184 × (94·N + 6) mm
Silicon, 20 % AM0 class; designed and tested for 7 years in LEO
41.6 W / 5.74 V / 7.24 A per ST102-10 module (BOL, AM0, 25 °C)
Remaining factor Pmp 0.79 @ 1×10¹⁴ e⁻/cm² (1 MeV)
Cover glass integrated, thickness customizable; highly ATOX resistant
Redundant interconnects; configurable end termination; optional bypass diode at end of string
Ready to bond — FR4, CFRP or aluminium substrates
Tested per module; serial production in Berlin; MOQ 20, ~2 months

Applications

- LEO constellation satellites using silicon for cost-driven power
- Panel and wing integrators who bond cells onto their own rigid or flexible substrates
- Body-mounted and deployable panels where module length is matched to the panel geometry

Key features

- - - Si-Core Modules bring terrestrial silicon cell technology to orbit at a fraction of the cost of GaAs. Each module is a pre-connected string of one to twelve 20 % AM0 class silicon cells on a radiation-resistant substrate with thermal-cycling-resistant metallization, delivered with integrated cover glass of customizable thickness, redundant debris-impact-resistant cell-to-cell interconnects and configurable end termination. Designed and tested for seven years in LEO and highly resistant to atomic oxygen.
      Choose the module length by the number of cells in series: every added cell adds 94 mm of length and 4.16 W of AM0 power. The ST102-10 reference module measures 184 × 946 mm and delivers 41.6 W (5.74 V, 7.24 A, BOL, AM0, 25 °C). Modules bond with silicone-based adhesive onto FR4, CFRP or aluminium substrates, rigid and flexible. Every module is visually inspected, IV-measured at AM0 on a DAkkS-accredited ASTM E490-00a bench, EL-inspected and dimensionally checked, with full traceability per serial number.
      Configure length & power and request a quotation: www.soltrac-space.com/products/si-core-modules

Customization

- Number of cells in series per module: 1 to 12 (length and power follow the cell count)
- Cover glass thickness to customer requirement
- End termination configurable to customer demands
- Optional bypass diode at end of string
- Low-current / high-voltage option on request

Flight heritage

Soltrac hardware in orbit since 2024.

Manufacturing

Serial production on Soltrac's own line in Berlin. Every module is visually inspected, IV-measured at AM0 (DAkkS-accredited ASTM E490-00a measurement), EL-inspected and dimensionally checked, with full traceability per serial number.

Testing & qualification

Designed and tested for 7 years in LEO. ECSS aligned for LEO missions; qualification data on request.

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Last updated: 2026-10-28