Wattsonic - Schmachtl Sun Energy Box

Use cases

• Monitor PV string production and battery state of charge on a live cloud dashboard for each installation.
• Create an alert when battery SOC drops below a defined threshold to notify the end customer or installer.
• Track grid injection and purchasing energy over time to verify self-consumption optimization.
• Log inverter temperature sensor readings to detect cooling issues before they cause shutdowns.
• Review fault flag registers remotely to diagnose inverter errors without a site visit.
• Compare phase voltages and currents across L1 to L3 to identify grid imbalance conditions.

Installation

1. 1Connect the Modbus RTU wiring (A, B, GND) between the Wattsonic Sun Energy Box RS485 port and the ModbusCloud gateway (MCG or MLP series).
2. 2Set the Modbus slave address on the inverter to match the address configured in the ModbusCloud template, typically address 1.
3. 3Verify the serial communication parameters on the inverter (baud rate, parity, stop bits) and ensure the gateway uses identical settings.
4. 4Import the Schmachtl Sun Energy Box template from the ModbusCloud template library into your project.
5. 5Confirm that register data appears correctly on the ModbusCloud dashboard, paying attention to 32-bit register values and their scaling.
6. 6If upgrading from a template version prior to 1.0.2, verify that the Battery_Power scaling factor is correct after import.

Things to watch for

Registers (92)

92 read / 0 write

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