That's because home battery providers aren't competing on price yet. The market is still small, the risks are high and they need to figure things out.

Once the early adopters run out they will have to start competing on price to make sales. There's no justification for a home battery when they charge 10k for 10kwh as they do now - only early adopters and government subsidies getting it over the line.

IMO home batteries should be a relatively easy install in principle, it's just still in that early expensive phase.