Products/Alternative technology · GaAs
Cells: flight-proven · 30 % BOL

GaAs Solar Cells & Solar Cell Strings

Triple-junction GaAs CICs from Everlight Space — 30 % BOL efficiency, flight proven, with integrated coverglass, interconnectors and bypass diode. Delivered as individual cells or custom welded strings.

Two formats, both fully specified in the datasheets below: the compact ES-30TJSC-30 that packs versatile and efficiently, and the ES-30TJSC-80 with the best mass and price per watt in our portfolio. Every cell can be tested and characterised on our near-AM0 test bench before delivery.

30 % BOLFlight provenCustom welded strings
CAD visualizationDrag to rotate
CAD visualization built from the datasheet dimension drawings · CIC with coverglass, 3 front interconnectors and diode interconnector
Key featuresAlternative technology · GaAs
01

30 % BOL, flight proven

Triple-junction GaInP₂ / GaAs / Ge cells, 30 % BOL efficiency in batch production, flight proven — suited to GEO, MEO and long-duration LEO missions where radiation lifetime and efficiency per area drive the design.

02

CIC assembly

Integrated KFB 120 AR coverglass (120 µm) and silver-coated Kovar interconnectors, 4 weld points each.

03

Bypass diode

External Si diode integrated in every CIC to protect against potential damage to the cell.

04

Custom welded strings

Any string length, welded on our qualified stringing line, 80 € per interconnected cell.

05

Tested in Berlin

Optional individual test report per cell from our near-AM0 test bench; full traceability per serial number.

06

Stock and returns

Replacement stock for prompt exchanges; 21-day incoming inspection window.

Configurator

Cells or strings — priced as you configure.

Choose a cell format and quantity for individual CICs, or configure interconnected strings. Unit prices follow the quantity tiers of our sales proposal; interconnection is charged at 80 € per welded cell.

Cell format
Quantity

Cells per string
Number of strings

Prices in EUR, excl. packaging, shipping and VAT · individual AM0 test report per cell optional · delivery estimates subject to confirmation at order

Configuration

Individual cells

Cell type / format
ES-30TJSC-30 · 30.15 cm²
Cells per string
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Number of strings
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Total cells
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Unit price · tier
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Cell cost
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Interconnection cost
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Estimated delivery
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Total price
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Budgetary price for the selected quantity; the quotation confirms tier, lead time and shipping.

SpecificationsFrom the datasheets v1.25 · 2025-04-09
ParameterES-30TJSC-30ES-30TJSC-80
Mechanical
Dimensions(40.15 mm ± 0.15 mm) x (80.15 mm ± 0.15 mm)(144.45 mm ± 0.15 mm) x (68.65 mm ± 0.15 mm)
Cell area30.15 cm²79.80 cm²
CIC thickness300 µm ± 75 µm400 µm ± 75 µm
CIC weight3.7 g ± 0.3 g13.5 g ± 0.5 g
Base materialGaInP2 / GaAs / Ge on P-Ge substrateGaInP2 / GaAs / Ge on Ge substrate
Cover glassKFB 120 AR, 120 µm ± 20 µmKFB 120 AR, 120 µm ± 20 µm
AR coatingTiOx/Al2O3TiOx/Al2O3
Interconnector (3x front side / 1x diode)Kovar, silver coated, 30 µm, 4 weld pointsKovar, silver coated, 30 µm, 4 weld points
Bypass diodeExternal Si diodeExternal Si diode
Electrical · AM0 (1353 W/m², 25 °C), typical
Voc2750 mV2760 mV
Isc520 mA1375 mA
Jsc17.3 mA/cm²17.2 mA/cm²
Vm2430 mV2440 mV
Im503 mA1325 mA
Jm16.7 mA/cm²16.6 mA/cm²
ηbare30 %30 %
Radiation degradation · 1 MeV e/cm² (1E14 / 5E14 / 1E15)
Im/Im00.99 / 0.98 / 0.960.99 / 0.98 / 0.96
Vm/Vm00.96 / 0.93 / 0.910.96 / 0.93 / 0.91
Pm/Pm00.95 / 0.91 / 0.870.95 / 0.91 / 0.87
SCA values · shadow protection
Vacc2350 mV2350 mV
Min. average current at Vacc500 mA1325 mA
Min. individual current at Vacc490 mA1300 mA
Vforward (dark)≤ 1 V at 620 mA≤ 1.2 V at 1000 mA
Ireverse (at 4.0 V dark)≤ 10 µA≤ 10 µA
Temperature gradients · BOL / 5E14 / 1E15 (20–65 °C, linear)
Isc [mA/°C]0.33 / 0.30 / 0.390.88 / 0.80 / 1.04
Voc [mV/°C]-5.9 / -6.1 / -6.3-5.9 / -6.1 / -6.3
Im [mA/°C]0.27 / 0.29 / 0.450.72 / 0.76 / 1.20
Vm [mV/°C]-6.0 / -6.2 / -6.5-6.0 / -6.2 / -6.5
Threshold values
Absorptivity≤ 0.92 (CIC)≤ 0.92
Interconnector pull test (at 45°)≥ 0.83 N/mm²≥ 0.83 N/mm²
Datasheets & requestDownloads · technical inquiries