Independent decision aid — home storage

Three promises, three completely different installations

A home battery does not keep one promise, it keeps three — and they are not the same product.

2 answers · 2 minutes · no email · no brand imposed

Mission diagram, candidate hypothesis, local proof and commercial gates

The unresolved point

A home battery does not keep one promise but three — bill, backup socket, protected circuits — and they are not the same installation.

What the check actually resolves

1. LoadWhat the backed-up socket or circuit must hold
2. Duration / energyHours of outage targeted, usable kWh
3. RechargeSolar, off-peak tariff window, mains return
4. Limit / verdictChangeover device, qualified electrician, DNO notification (G98/G99)

230 V architecture diagram: load, duration, recharge and limit. It is not a product measurement.

Candidate under test

Jackery SolarVault 3 — hypothesis path — where the candidate would sit, not a product image.

Jackery SolarVault 3

Named as a hypothesis only, because the reader will meet it while researching. It is not sourced as an orderable UK variant, and it is not a winner.

The exact UK variant, live orderability and an operable merchant destination are all unproven. No UK stock is claimed.

Local proof

230 V / 50 Hz

BS 1363 type G socket, consumer unit and RCBO protection

Smart meter (SMETS2), a genuine time-of-use tariff and DNO notification under G98/G99: three real local limits.

This page is written for the 230 V / 50 Hz European supply only; no transatlantic electrical standard is used here.

Merchant readiness — the four real gates

Current state read from the project catalogue. No stock, price, delivery, warranty, VAT or commission is asserted.

1. Exact local variant / SKUCommercial verification in progress.
2. Live stock and orderabilityCommercial verification in progress.
3. Accepted affiliate programme and stable local deep linkCommercial verification in progress.
4. Tracked click, visible in BtB and in the networkCommercial verification in progress.

At least one gate is open, so no merchant call to action is offered on this page.

Still provisional — one more answer can change it

One proof is missing before any verdict

What changed: The limiting factor is the promise itself: bill, backup socket and protected circuits are not bought the same way.

Which of these three promises do you actually expect?

This is the answer most likely to change the verdict.

The limiting factor is the promise itself: bill, backup socket and protected circuits are not bought the same way.

Low — evidence insufficient

What this answer assumes (4)

Choose first, then receive a provisional answer. At most two answers, then the full check tests it against your own constraints.

Scope: 230 V / 50 Hz mains and BS 1363 sockets. Only this local architecture is used here.

Diagram: a few critical circuits behind a transfer switch, grid down. Not a product.

Cut my electricity bill
The limiting factor is metering and tariff, not the capacity of a battery.
Keep one socket alive through a power cut
The limiting factor is what the backup socket actually has to carry.
Keep some circuits running automatically
The limiting factor is the installation: a changeover device, a qualified electrician and a DNO notification.

Nothing is offered for sale here: the four local gates above are still open.

The product families you will meet

They are named as hypotheses, never as winners: no capacity, price or compliance is asserted here.

What must be proven before any product is named

Transparency

Independent publication. No paid placement, no bought ranking.
Home storage will be covered on affiliate terms only: we sell nothing and hold no stock.
A merchant link appears only once the four local gates are closed.