MeshSolar is an integrated power management and communication solution designed for outdoor low-power devices, consisting of a BMS Power Management Board and an BLE+LoRa Communication Control Mainboard. The system features solar MPPT charging, multi-protocol fast charging (supporting USB PD3.0 and 18-24V DC input), intelligent battery management (compatible with 1-4 cells/battery packs, with overcharge/over-discharge/short-circuit/over-temperature protection and balanced charging), and dual-mode Bluetooth + LoRa wireless communication (LoRa range up to 10 km with 21±1 dBm transmit power). With its low-power design, extensive hardware expansion interfaces (supporting displays, GPS, and general-purpose I/O), and seamless compatibility with the HT-n5262M module (nRF52480 + SX1262), MeshSolar is ideal for high-power or long-term stable power supply applications such as solar-powered systems and remote monitoring. It also fully supports the Meshtastic ecosystem. Warning: Verify the battery switch alignment with solder points and battery connected before applying power (activation/charging/setup) to avoid board damage. MeshSolar requires a 20V charger for activation. If a 20V charger is not available, a compatible 20V power adapter can be purchased separately. NOTE: USB PD 3.0 charging requires a PD 20V charger, PD 20V charger not included. Warning: Verify the battery switch alignment with solder points and battery connected before applying power (activation/charging/setup) to avoid board damage. MeshSolar requires a 20V charger for activation. If a 20V charger is not available, a compatible 20V power adapter can be purchased separately. For a more detailed MeshSolar introduction, please contact customer service before placing an order. Supports 1-4 battery configurations. Multi-mode charging options:18~24V Solar MPPT charging,USB PD3.0 fast charging, 18~24V external DC charging. Web-based configuration for charging/disch