Best Home Backup Generator UK
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In this article, we’ll be checking out the Best Home Backup Generator on the UK market.
We analyse and pick the top models, review the winning battery generators, and let you know which ones are best for your particular needs.
In 2026, your best choices for a standby power source for your home are no longer petrol or diesel generators. They are very expensive to purchase and maintain, and have huge ongoing running costs.
Your best option now is a power station with a lithium (LiFePO4) battery. In the last 5 years or so, they have become the only choice, the best option by far. The up-to-date lithium iron phosphate (LiFePO4) cells are now super safe, and protected by highly sophisticated BMSs (Battery Management Systems). They now pack a ton of power into a relatively small and light unit.
Remember, we said relatively small and light, they’re not featherweight, nor are they teeny tiny!
The Best Overall was the EcoFlow Delta Pro 3 (lowest priced seller is right here).
In No.2 spot, the Best for Longevity, was the Bluetti Apex 300 (here’s the best deal we found).
The third placed backup generator, the Value Pick was the Aferiy P310 (this model, on Aferiy UK).
| Table of contents | |
|---|---|
| Battery generator reviews | |
| Best home backup generator: | |
| #1 | EcoFlow Delta Pro 3 |
| #2 | Bluetti Apex 300 |
| #3 | Aferiy P310 |
| Summary |
When we reviewed the UK home battery backup generator market, we based our reviews on how well the products met the typical needs people want from it.
To that end, we looked at:
- The peak power – how well can the generator deal with your most power-hungry devices.
- The capacity – how long will it last in the event of a power cut, for example.
- How up-to-date the lithium cells are. This is an industry with insanely fast year-on-year improvements, so you’ll want to make sure they’re up-to-date.
- What expansion options are available, if you were to decide to do so either right now, or later down the line.
- Quality of the internal components and build quality of the unit itself. This is truly an investment, and you want a product that lasts well.
In addition to this, we chose winners for a few categories of the most common reasons for purchase.
So you can pick the battery generator that meets your specific needs.
Battery Backup Generator UK Reviews
Here are the reviews, showing you the best and worst aspects of each model.
Category Winners: Home Backup Generators
Here were the category winners:
- Best Overall: EcoFlow Delta Pro 3
- Best for Longevity: Bluetti Apex 300
- Value Pick: Aferiy P310
EcoFlow Delta Pro 3
- Power: 4096Wh
- Maximum Power: 4000W
- Weight: 51.5kg
- Dimensions: 69.3×34.1×41.0 cm
Bluetti Apex 300
- Power: 3840W
- Maximum Power: 2764.8Wh
- Weight: 38kg
- Dimensions: 525 × 327 × 320 mm (20.67 × 12.87 × 12.6 in)
Aferiy P310
- Power: 3840Wh
- Maximum Power: 3600W
- Weight: 40kg
- Dimensions: 58.432.146.4cm
EcoFlow Delta Pro 3
Here are the main reasons we chose it as the UK’s best home backup generator:
Genuine ability to provide backup for your whole home in the event of a power cut
That’s thanks to a monstrously huge 4000W of power, 400W more than the original Delta Pro. And that extends to even as much as 6000W using the X-Boost function. This is large enough that there’s really not much you wouldn’t be able to cover during a power cut, or during a normal day if you plan to save energy costs by using the Delta Pro 3 to power your house, along with a gas generator, for example.
Super-quiet both when charging and under heavy load
Now we’ve used plenty of portable power stations and generators that promise whisper-quiet running, and we’re like: “uh, is that whisper quiet compared to a jet plane, or what?”. But the Delta Pro 3 is the real deal, it’s really shockingly quiet, almost silent up to, say 1500 to 2000W, and then not too bad at the really high loads, certainly it’s very reasonable compared to other generators.
It’s easier to move around than other home backup generators
For its considerable size and hefty weight, it’s not that hard to move around. That’s thanks to an extendable handle that is very… well, handy. It pulls out of the bottom of the unit, which you can use then to wheel it around. Let’s be clear, though. It’s 51.5kg. If you’re moving it up steps, for example, you’ll need to be pretty strong or have help from someone else to do so.
The best an App can get
For years, we’ve reckoned EcoFlow product the best quality App, and it’s still true. It works flawlessly, giving you a ton of options to get the charging and discharging power levels exactly where you want them to be, plenty of modes to choose from, and it’s very useful to keep track of how the unit operates.
It’s easy to set it up to power your whole home
That’s because of the Manual Transfer Switch. It lets you connect the Delta Pro 3 directly to your home’s circuits, allowing you to switch easily between grid power and the Delta Pro 3 to save bills in the ways that suit you best. For example, you can use battery power at times of high energy costs, and grid power during off-peak time periods. And this way, you’ll also have it ready, at the click of a switch, in the event of a power outage.
The cons of the Delta Pro 3:
As much as double the price of its main competitors
It’s the best battery backup generator for your home. But this is an investment, make no mistake, and is at least a thousand quid more than the other two winning models on this list. At this hefty price level, it’ll take a good many years for you to make your money back on it. You still should, though; given the EcoFlow quality, you can expect it to last a very long time.
50% less life cycles than the Bluetti Apex 300
4000 cycles is a lot, there’s no doubt about that. Estimates for how long that will last vary according to your usage, but it’s safe to say you’re likely to get at least 10 years out of it with heavy usage, and maybe 12 to 15 years with moderate usage, and maybe even beyond that with light usage. But the Bluetti Apex 300 is rated for 6000+ cycles to 80% capacity, which is 50%. Bluetti reckon their unit will give you as much as 17 years. Whether that’s realistic or not, it’s entirely possible you get a few more years of solid usage from the Bluetti home backup generator, compared to the EcoFlow.
Where can you get it?
You can see it at EcoFlow UK right here.
Bluetti Apex 300
Pros and who needs this :
Expansion is easy and you can expand to a huge system, step-by-step, as needed
You can stack the Apex 300 with a huge number of additional batteries to give yourself a generator backup system of as much as 19kWh. That’s quite a lot more than the maximum expandable capacity of the Delta Pro 3, of 12kWh. And if you did want to extend that system even further in future, you can purchase 2 additional Apex 300’s, and with add-on batteries make a collossal 58kWh system. At these sizes, and with a commensurately large solar panel setup, it really starts looking like genuine off-grid freedom.
A lithium battery that could last as much as 50% longer than EcoFlow
It’s rated for 6000+ cycles, compared to the 4000 cycles of the Delta Pro 3. Bluetti reckons it could last up to 17 years, and we don’t feel that’s outwith the bounds of possibility, with a bit of luck.
Phenomenal value
Given Bluetti’s status right at the top of the highest quality makers of battery generators, the huge number of life cycles it’s rated for, and its power and capacity, we reckon it actually offers phenomenal value. And that opinion becomes even more pronounced when you look at the (much) higher price of the EcoFlow Delta Pro 3.
Potentially huge savings if you purchase the SolarX 4K add-on
The unit itself allows for 2400W solar power maximum, but if you get the SolarX 4K add-on, that allows an additional 4000W of solar power.
Cons and why this model is not for you:
Under-equipped with output ports, relatively speaking
That is, if you don’t purchase the additional Hub D1. The Apex 300 unit itself has only 6 ports. The 4 AC ports is pretty good, but there are just 2 car cigarette lighter ports in addition. Not a single USB-C, USB-A, DC-5521 or Anderson port to be seen.
Slightly slower UPS switchover time
20ms is still good. But it’s double the 10ms switchover time you’d get with both the Delta Pro 3 and the Aferiy P310.
Where can you get it?
Here’s the best price, at Bluetti UK.
Aferiy P310
Plus points:
The best value and quickest return on your investment
It’s less than half the price of the Delta Pro 3 and a bit cheaper than the Apex 300, despite having more than 1kWh greater capacity (albeit with 240W less power). There are various ways to use the P310 to save money on energy costs, but using it with solar panels is the best. You can get 2000W of power from solar energy and use that to power your various household appliances, through your battery generator. Given the P310’s relatively low cost, choosing this model is going to be your fastest way to get your money back on the investment.
The best system for ports
It has 13 ports, and that’s the most we’ve ever seen in a battery backup system or portable power station. 3 AC ports, 2 DC5521s, 2 USB-As, 4 USB-Cs, a car cigarette power port, and an XT-60. In the event of a power cut, or if you plan to use your home backup system more regularly, with a generator, then the whole family would be wanting to charge their devices. With the P310, they’re probably all covered. It’s a common strength in this brand’s products, as we discovered in our review of Aferiy Power Stations.
Relatively lightweight
Relatively, mind. It’s 40kg, and that’s not an easy thing to shift. But that’s fully 11.5kg, or more than 25% lighter than the EcoFlow Delta Pro 3. In addition, the retractable is a good one, so it’s quite simple to move it around.
Handy input power knob
We like the adjustable input power knob. You can therefore choose how much power you want to use to charge. Give it a big boost if you’re in a rush. Or select a slower, smaller charge level if you want to let it charge overnight. And we like that it has a physical knob that lets you do it. Most high-end power stations let you do this kind of thing using the App, but we like to have the ability to select it on the unit itself.
Minus points:
Not likely to have such a long lifespan
Compared to the other two winning models in this review, that is. It’s rated for 3500+ life cycles, dwarfed by the 6000+ cycles you could potentially get from the Apex 300.
The lowest solar max
You can get up to 2000W from solar power, but no more. Like the others, you can increase that maximum value if you expand the system with additional batteries.
Where can you get it?
You can see it at Aferiy UK here.
Best Home Backup Generator UK Summary
Thanks for reading the Best Home Backup Generator UK.
Battery backup generators are growing fast in the UK, as people look for better power solutions in the event of power cuts, as well as other ways to power their household beyond the grid, in the wake of insane, and still rising energy costs.
Power stations like those on this list are an ideal solution.
You can hook them up with solar panels and get power basically for free. These systems have a big enough capacity to last as much as a few days in the event of losing power. And enough juice to power pretty much anything you need in your household.
The Best Overall battery generator was the EcoFlow Delta Pro 3 (see best deal). Massively powerful, an intuitive App, and really surprisingly quiet under heavy load. Its price tag is comfortably the biggest drawback to this generator.
In No.2 spot, the Best for Longevity, was the Bluetti Apex 300 (check out the lowest-priced seller). Hugely extensive expansion options make it essentially future-proof, for potentially building an extremely large home power system in the future. Its 6000+ life cycles adds to that essence of longevity, making it likely to last not just 10 but maybe even 15 years and beyond. The primary drawback is the lack of ports (if you don’t buy the additional Hub D1).
The Aferiy P310 (this model, at Aferiy UK), is the No.3, the Value Pick out of the top home battery backup systems in the UK. It’s a match for the top brands in terms of quality, and range of options and features, in most areas. That said, its lifespan could be quite a bit shorter than the Apex 300, and it can’t match the two winning models for maximum solar power wattage.
Good luck with your selection!