Why is my Jackery SolarVault limited to 800 W on a plug but 2.5 kW when hardwired?

In more detail

• GB plug-in route (from 27 Aug 2026, SI 2026/848 per solar brief): solar-only, up to 800 W AC, not designed to store imported electricity; battery kits sit outside.
• SolarVault AC grid input 3,680 W/16 A; PV 4 x 1,000 W at up to 60 V; IP65; -20 to 55 °C.
• UK Jackery store did not list SolarVault on 2026-09-24; EU manual only.

The facts, dated

1. 01
   Output can be increased to 2,500 W via the app after a licensed electrician's confirmation. — 2500 W

   manufacturer · n/a · checked 24 September 2026 · cdn.shopify.com

2. 02
   Model codes JS3-2500PMA-GY / -GY-15 / -GY-25 list 2,500 / 1,500 / 800 W max on-grid AC output.

   manufacturer · n/a · checked 24 September 2026 · cdn.shopify.com

3. 03
   SolarVault 3 Pro Max not listed on uk.jackery.com catalogue.

   market_data · UK · checked 24 September 2026 · Jackery UK

What we saw in the field

[QA review 2026-09-24] P-6 AGREES: 800 W on a plug vs 2.5 kW hardwired matches the manual's electrician-confirmation route. P-5 AGREES (4 MPPT, 4,000 W DC), P-8 AGREES (IP65, -20 to 55 C). P-4 AGREES: UK page gives 2.52 kWh expandable to 15.12 kWh (the 45.36 kWh EU-listing figure does not apply to the UK). P-9 AGREES: UK page confirms a 10-year warranty and 15-year design life. P-7 CONTRADICTS for UK: 'charge up to 3.6 kW' vs UK page 2,500 W bidirectional; 3,680 W AC input is the EU specification. The electrician's FCU/13 A approach is outside Jackery's wording and should follow BS 7671 551.7.

Sources

• cdn.shopify.com — cdn.shopify.com/s/files/1/0572/7217/2741/files/Jackery_SolarVault_3_Pro_Max_Benu…
• Jackery UK — uk.jackery.com/products.json?limit=250

Last checked: 24 September 2026