Fast-charging 1kWh backup power at a rare all-time-low price

Is the EF ECOFLOW DELTA 3 Plus (Renewed) worth buying? Yes, if you want a fast-charging, high-output home backup unit and can accept renewed-condition packaging risk; at £548.99 it is below its £630.09 average and close to the £599 Anker SOLIX C1000. The combination of a 1024Wh LiFePO4 battery, 56-minute full charge, and up to 2400W output makes this one of the more practical portable power stations for UK homes dealing with outages, peak-time load shifting, or garden/outdoor power needs.

First impressions

The headline numbers matter here: £548.99, 4.6/5 from 74 reviews, and a current all-time lowest price. That immediately puts it in the “serious purchase” bracket rather than impulse-buy territory. The product is listed as unused with only part of the packaging defective, which lowers the usual renewed-item risk, but it also means buyers should expect cosmetic or box-condition compromises rather than a pristine retail experience.

What makes the DELTA 3 Plus stand out?

The biggest feature is the charging speed. EcoFlow says it can go from 0-100% in 56 minutes using 1500W AC input, reaching 80% in 40 minutes. For UK users, that matters because short charging windows are useful when electricity is cheaper off-peak or when you want to top up before a storm or planned outage. The LiFePO4 chemistry is also the right call for a home backup unit: it is generally preferred for cycle life and stability compared with older battery chemistries.

Output is equally important. EcoFlow claims up to 2400W and the ability to power 99% of household appliances, with support for 11 devices simultaneously. That makes this far more capable than smaller camping stations like the Anker SOLIX C300 (£219, 288Wh, 300W), which is useful for phones and laptops but not for most appliances. The DELTA 3 Plus is aimed at running real loads: routers, lights, small kitchen appliances, tools, and other household essentials.

How does it perform for backup and everyday use?

The 10 ms UPS switch-over is a major practical advantage if you want to protect sensitive electronics such as routers, desktop PCs, or network gear during brief power cuts. EcoFlow’s Smart Energy Management System adds 12-hour storm and outage alerts, low-battery reminders, and a usage dashboard through the app, which makes it easier to manage as a home resilience tool rather than just a battery box.

Noise is another plus. The X-Quiet claim of 30 dB below 600W and 40 dB at higher loads suggests it should be much less intrusive than a fuel generator, which is a meaningful benefit for indoor-adjacent use, overnight running, or garden spaces where noise matters. That said, all real-world performance still depends on the load you place on it and how you charge it.

Is it good value for money?

At £548.99, this is 15% off the £649 RRP and 12.9% below the £630.09 average from 21 price points over about 21 weeks. Those numbers support the price-alert verdict: this is a good time to buy. The current price is also notably lower than the £799 highest recorded price and only slightly below the £599 Anker SOLIX C1000, which has a similar rating but a slightly larger 1056Wh battery and a 58-minute full charge claim.

The value case is strongest if you care about speed, UPS function, and app-based control. If you only need basic emergency charging, cheaper options exist. If you want a compact camping pack, the MARBERO 98Wh unit at £109.99 is far cheaper, but it is not in the same performance class.

What should buyers watch out for?

The main warning is that this is a renewed item, even if unused. The listing says only the packaging is defective, but that still introduces uncertainty versus a brand-new unit. Another limitation is that the product data provided does not include solar charging details after the cut-off in the listing snippet, so buyers should verify solar input specs before planning a full off-grid setup. Also, the #12,235 sales rank suggests it is not a mass-market bestseller, so there are fewer review signals than on top-ranked models.

How does it compare to alternatives?

Against the Anker SOLIX C1000, the EcoFlow is cheaper by £50.01 at current prices and offers a very similar charge-speed promise, while matching the same 4.6★ rating. Against the Anker SOLIX C300, it is vastly more capable for home backup but much more expensive. Against the MARBERO, it is in a completely different category: the EcoFlow is for household continuity, not just phone charging.

For UK households, the DELTA 3 Plus makes sense when you want a battery that can be charged quickly, used for meaningful appliances, and kept ready for outages without the noise, fumes, or maintenance of fuel generators.