Power management

USB-C, DC/solar, and battery inputs, arbitrated and charged automatically, with true open-circuit-voltage MPPT on the solar input.

Two independent I2C buses

An always-on internal bus for the board's own power-management ICs, and a switched user bus with a differential buffer for remote sensors.

Datasheet-driven design

Every IC's required external components are drawn directly into the schematic and hand-routed — nothing is a black-box breakout module.