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Open Source Solar Array Simulator

A programmable solar array simulator for automated firmware testing. Emulates I–V curves at 0–45V (up to 6A)

edward-viaeneEdward Viaene
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Built with a Renesas ISL81801 4-switch buck-boost controller. Uses 24V input. Output voltage is determined by an external DAC that wires into the feedback loop using a header pin. Output current is measured by a dedicated INA296 shunt monitor. The idea is to allow an external DAC/ADC to close the panel-emulation loop in real time by measure current, look up the I–V curve, and adapt DAC.

Lab-grade solar array simulators can easily cost USD 10,000. This is a JLCPCB-assembled board with the ISL81801 and 4 MOSFETs. External DAC/ADC is needed, which can be BenchPod (see BenchPod project on Hackaday).

solar-array-simulator-schema.pdf

Adobe Portable Document Format - 133.46 kB - 08/24/2026 at 20:07

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