If you’re comparing the DELTA 2, the key question is usually capacity versus cost. At £549, it sits in a sweet spot for home backup and portable use, but there are cheaper options for light-duty needs and bigger, more powerful options if you want longer runtime or faster charging.

Jackery Explorer 500 is the budget-friendly choice here. At 518Wh and 500W output, it’s much smaller than the DELTA 2, so it won’t run as many appliances or last as long during a blackout. What’s better is the lower price and simpler, lighter design for camping, phones, laptops, lights, and small devices. What’s worse is the limited output and much lower usable energy. Choose this if you want a compact, easy-to-carry power station and don’t need to run kettles, microwaves, or larger tools.

ECOFLOW RIVER 2 Pro is the closest alternative for people who like EcoFlow’s fast-charging ecosystem but don’t need DELTA 2 scale. With 768Wh LiFePO4 battery and up to 1600W X-Boost, it’s more capable than the Jackery 500 and still very portable. What’s better is the rapid charging and good balance for camping, van life, and short home backup for routers, lights, and small appliances. What’s worse is that it has less capacity than the DELTA 2, so it won’t keep essentials running as long. Pick this if you want a premium portable unit that’s easier to move around than a larger power station.

The second ECOFLOW RIVER 2 Pro listing with a 65W charger is effectively the same battery and output class, so the comparison is similar. The main thing to check is what’s included in the box. If the charger bundle is better value or more convenient, it may be the smarter buy; otherwise, performance is broadly the same. It still loses to the DELTA 2 on overall capacity, but wins on portability and usually lower day-to-day convenience for travel.

VTOMAN Jump 600X is the cheapest option here by a wide margin. At 299Wh and 600W output, it’s best for basic emergency use rather than serious home backup. What’s better is the price and the fact it still uses LiFePO4 chemistry, which is reassuring for cycle life. What’s worse is the much smaller battery, so in UK winter conditions or during longer outages, it will run out quickly. Choose this only if your needs are modest and you mainly want a low-cost emergency power source for phones, lights, and small electronics.

Jackery Explorer 1000 v2 is the strongest all-round alternative to the DELTA 2. With 1070Wh, 1500W output, and 1-hour fast charging, it offers more usable energy and more headroom for appliances. What’s better is the larger battery and stronger inverter, which makes it better for home backup, off-grid use, and longer camping trips. What’s worse is the higher price and likely heavier size, so it’s less convenient if you want something compact. This is the one to choose if you want a noticeable step up in runtime and flexibility.

For UK buyers, remember solar performance is seasonal: a 1kWh battery can be a great match for spring and summer topping-up, but in winter you may only harvest a fraction of that from a small panel. If you want the best value, think about what you’ll actually power — not just the headline watt-hours.