How to use surplus solar energy

Ways to use available energy in batteries, consumption and water heating.

ALFRED Heat adjusts water-heating power to the solar energy available. Surplus generation can stay in the home rather than being exported. The controller distinguishes solar production from stored battery energy to avoid unnecessary battery discharge. When generation is insufficient, heating can use grid electricity. A spot tariff allows scheduling during cheaper hours, but is not required to use solar surplus. Results depend on generation, hot-water demand and system settings.

Choose the appropriate variant and settings

The application 1.5 release describes 1F and 3F variants. The three-phase solution requires installation by an electrician. Features depend on the device and system configuration, so confirm inverter connectivity and water-heater suitability before ordering. The application provides temperature, tank-volume and heating-element settings, plus heating-status monitoring. Manual heating can start without waiting for favourable conditions. Explore Guardexy Heat Discuss a suitable solution

← Back to NewsGUIDE · CONTROL2026-09-23

CONTROL

PROTECT

MONITOR

How to use surplus solar energy

Choose the appropriate variant and settings

Let’s discuss your solar installation, operation or portfolio.