Solar & Home Energy · 8 min read · Beginner

Solar Panels, Batteries & Inverters Explained

Understand the main parts of a home solar system, including panels, string and hybrid inverters, batteries, optimisers and export.

Key points & steps

Solar panels generate DC electricity when daylight reaches the cells; the amount produced varies with array size, orientation, pitch, shading and weather.
An inverter converts the panels’ DC electricity into AC electricity that normal household circuits and appliances can use.
A standard solar inverter manages the PV array, while a hybrid inverter can also manage a compatible battery within the same system architecture.
A battery stores surplus energy for later use. Its headline capacity and usable capacity are not always identical, so compare usable kWh when assessing storage.
Optimisers can provide module-level electronics on suitable systems, helping monitoring and system design where roof faces or shading conditions vary; they are not automatically necessary on every roof.
Microinverters perform conversion at individual-panel level rather than using one central string inverter and can suit some complex roof layouts.
Any electricity not used or stored may be exported to the grid, subject to the system, metering and export arrangements in place.

Do not choose equipment solely from the highest headline kW or kWh number; compatibility, usable capacity, warranty and system design matter.
Ask installers to explain what happens if one roof face is shaded and how the proposed inverter deals with multiple orientations.
Backup or EPS functionality is separate from ordinary battery storage and needs a system specifically designed for it.