Fuse box preparation
Dedicated battery circuit, consumer-unit extension or single- to three-phase.
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A home battery runs on its own circuit — and not every fuse box still has room for one. As part of the battery installation, a certified electrician extends the consumer unit, replaces an outdated box or converts the in-box installation from single-phase to three-phase. Fuse-box work is always a job for a certified electrician, delivered according to the applicable installation standards.
For preparing the fuse box you pay € 350 to € 950, depending on the state of the existing installation. This work deliberately lives here as part of the battery job; stand-alone electrical work without a battery falls outside this site.
To be honest: upgrading the grid connection itself (for example from 1×25A to 3×25A) is done by the grid operator, with its own rates and lead time. The installer can apply for it with you, but it falls outside the installation quote.
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