Introduction

Every Ampowr battery comes with a monitoring and steering box. On request, we can enable a Modbus server that allows reading device measurements and steering battery and PV. This allows one to steer energy assets in a generic way. Integrating with this specification once means that all types of batteries from Ampowr can be steered.

Connection

The connection to our Modbus server depends on the network setup on-site. If a partner's box is installed on the Ampowr network on-site, the server is available at 192.168.1.10:502. If there is a different network setup, we can forward port 502 to our API gateway.

Modbus unit ID

Our Modbus server is reachable with unit ID 1.

Endianness

Please note that our Modbus server is set up with the Little Endian byte order.

Time-to-live (TTL)

For steering commands (register 2000 and 2001), we set a TTL. This means that if there is no new command after a set period, the command will be deleted. The TTL value is configurable, but is set to 60 seconds by default.