Is solar power feasible for running Meshtastic devices?

Choosing the Right Solar Panel

Meshtastic devices draw power from a 18650 Li-ion battery, and we can estimate the required solar panel size based on the device’s average power consumption. Assuming an average current draw of 200mA and a 5V output, we can calculate the required solar panel size. A 5W solar panel with an efficiency of 15% would provide sufficient energy to charge the battery throughout the day, considering an 8-hour charging period and a 5-hour device usage period.

Optimizing Device Configuration for Solar Power

To maximize solar power collection and device uptime, it’s essential to configure the Meshtastic device and solar panel system correctly. We recommend setting the device to operate in low-power mode during periods of low solar irradiance and adjusting the transmission power according to the surrounding environment. This can help reduce battery drain and optimize energy harvesting from the solar panel.

Practical Considerations for Off-Grid Usage

When using solar power to run Meshtastic devices off-grid, consider the following factors: solar panel size, battery capacity, and ambient temperature. Ensure the solar panel is mounted at an optimal angle (ideally between 30° and 60°) to maximize energy collection. Regularly inspect and maintain the solar panel and battery to ensure efficient operation and extend their lifespan.