We finance roads at sovereign rates. Water pipes. Electricity transmission lines. All of them move or store something essential, serve the public, reduce system cost, last for decades.
A home battery does all of that. It stores surplus renewable electricity that would otherwise be curtailed. It reduces peak demand on the transmission network. It buffers the grid at the point of consumption. It lasts fifteen to twenty years.
It is infrastructure. We just haven't decided to treat it that way.
That decision — not a technology decision, not an economic decision — is why home batteries are still a premium consumer product instead of standard household infrastructure.
Consumer loan at eight to twelve percent over five years: economics marginal. Infrastructure financing at two to three percent over fifteen years: monthly cost below monthly saving.
The instrument already exists. Additional secured borrowing — the same product banks use for kitchen extensions and loft conversions. The rate is the mortgage rate. The term is the mortgage term.
A house with a battery and solar is a better credit than a house without. Lower energy exposure. Lower default risk. Better EPC rating. The bank's own risk model should want it.
Include batteries. Include heat pumps. Include EV chargers. Add the half-point state guarantee. The instrument that already exists suddenly covers the full electrification stack.
No new bank. No new product. No new legislation. A classification decision and a half-point guarantee. It's already built. Point it at the transition.