SMSSolar Maintenance Solutions
Battery Comparison · 2026

EcoFlow PowerOcean vs GivEnergy AIO

EcoFlow PowerOcean and GivEnergy AIO are the two best alternatives to Tesla Powerwall 3 in the UK in 2026. Both use LFP chemistry, both are all-in-one (inverter included), and both offer strong warranty terms. The decision comes down to modularity vs UK supply chain.

Our verdict

EcoFlow PowerOcean wins on warranty (15 years vs 12 years), outdoor mounting (IP65), and modular expansion (5 kWh increments). GivEnergy AIO wins on UK-built supply chain (faster parts, UK support team), three-phase option, and slightly lower entry price per kWh. For most domestic UK homes both are excellent — choose EcoFlow for warranty longevity and modularity; choose GivEnergy for UK support and faster lead time.

Side by side

Spec by spec

Dimension EcoFlow PowerOcean GivEnergy AIO
Entry capacity 5 kWh (modular) 13.5 kWh (fixed AIO)
Max single-stack capacity 25 kWh (5 × 5 kWh modules) 13.5 kWh (expandable via extra unit)
Continuous power output 5 kW per inverter 6 kW
Cell chemistry LFP LFP
Warranty 15 years (70% capacity) 12 years (60% retention)
IP rating IP65 — outdoor-rated IP21 — indoor only
Supply chain EcoFlow EU/UK distribution UK-built, Newark factory
Three-phase option No (single-phase only) Yes (3-phase AIO available)
UK support team EU support UK-based (Nottingham)
App quality PowerInsight — functional GivEnergy Portal — good
Price fitted (10–13.5 kWh equiv) £8,200 (10 kWh) £7,800 (13.5 kWh)
Octopus Flux compatible Yes Yes
Stock availability (May 2026) Dealer stock UK factory — very fast
Best for EcoFlow PowerOcean
  • Longest warranty (15 yr vs 12 yr)
  • Outdoor or garage install (IP65)
  • Modular expansion (start at 5 kWh, add later)
  • Homes wanting to scale beyond 13.5 kWh incrementally
  • Retrofit to existing solar (AC-coupled)
Best for GivEnergy AIO
  • UK-built supply chain (Newark, Notts) — faster parts
  • UK-based customer support team
  • Three-phase commercial sites
  • Homes wanting in-stock immediate install
  • Slightly lower cost per kWh on large capacity
Frequently asked

Common questions

Which has better modular expansion?
EcoFlow PowerOcean is the clear winner for modular expansion. You start at 5 kWh and add 5 kWh modules to the same inverter unit (up to 25 kWh total). GivEnergy AIO is sold as a 13.5 kWh unit — you'd need a second unit to expand, which is more expensive per kWh.
Which has better UK warranty support?
GivEnergy. UK factory, UK parts stock, UK-based warranty team. EcoFlow's support is European-distributed — still good, but GivEnergy can replace parts faster for UK customers.
Can both work as a retrofit to existing solar?
Yes — both are AC-coupled. They connect to your existing solar system without replacing the inverter. EcoFlow's outdoor IP65 rating can be an advantage for homes where the ideal mounting location is outside (garage exterior, outbuilding wall).

We install both — get a quote

Free survey, fixed-price quote, MCS certified. We fit 5 Powerwalls every week and we're an authorised EcoFlow + GivEnergy dealer.

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