Tesla Powerwall 3 vs EcoFlow PowerOcean: Which is Right for Your Home?

The two battery systems we install most are Tesla Powerwall 3 and EcoFlow PowerOcean. Both are excellent — but they suit different households. Here's how we advise. ## Capacity and scaling - **Powerwall 3:** 13.5 kWh per unit, stackable to 3 units (40.5 kWh total) - **PowerOcean:** 5 kWh modules, scalable from 5 to 45 kWh PowerOcean wins on modular flexibility — add capacity over time. Powerwall wins on simplicity and single-unit capacity. ## Price - **Powerwall 3 supplied + installed:** ~£9,500 - **PowerOcean 10kWh supplied + installed:** ~£7,800 ## Warranty Both come with 10-year warranties. Tesla guarantees 70% capacity retention at year 10; EcoFlow guarantees 60%. ## When to choose each **Choose Powerwall 3 if:** you have a Tesla EV, want the best app experience, and value Storm Watch (mains outage protection). **Choose PowerOcean if:** you want to start small and expand, prefer modular maintenance, or need a more competitive entry price. ## Next steps We install both systems across [Manchester](/solar-panels/manchester), [London](/solar-panels/london), [Birmingham](/solar-panels/birmingham), and nationwide. Read our [Tesla Powerwall service](/tesla-energy-solutions) or [EcoFlow service](/ecoflow).