Are there inverters with batteries (hybrid inverters)?

A hybrid inverterGlossary · UPS technologyInverterThe component inside a UPS that converts DC power from batteries back to usable AC power. combines the solar inverter and the battery charger/inverter in one unit. Daytime energy supplies your consumption first, the surplus charges the battery and, where permitted, the rest is fed into the grid. In the evening the battery covers consumption and reduces the energy you buy from the grid.

Not every hybrid system offers the same kind of backup. Some keep selected loads running during a power cut through a separate backup output (backup/EPS), usually with a short transfer timeGlossary · UPS technologyTransfer TimeThe brief power gap when a UPS switches from mains to battery, typically 2–10 ms for line-interactive models and zero for online ones.; others simply stop, like an ordinary grid-tied inverter. For permanent off-grid operation you need an inverter that supports off-grid mode and correctly sized panels and batteries.

Before buying, check three things: whether there is a backup output and how much power it delivers, the transfer time, and which batteries are compatible in terms of technology, voltage and communication. For computers and sensitive equipment that cannot tolerate even a momentary interruption, a UPS in front of them remains the safest choice.