M · Glossary
Modbus
Modbus is a register-based communications protocol used by compatible inverters, batteries, meters and gateways to exchange readings or control values, often as Modbus TCP (Transmission Control Protocol) or Modbus RTU (remote terminal unit).
Modbus is a register-based communications protocol that lets compatible equipment exchange readings or control values through numbered addresses. In home energy systems it may appear in inverter, battery, meter, data logger or gateway documentation, especially as Modbus TCP (Transmission Control Protocol) over Ethernet or Modbus RTU (remote terminal unit) over RS485 serial wiring.
Category
Inverters and power electronics
Applies to
Solar, Battery storage
Last reviewed
15 Jun 2026