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EcoFlow DELTA Pro Ultra Extra Battery

Original price was: £2,199.00.Current price is: £1,799.00. inc VAT

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Description

The EcoFlow DELTA Pro Ultra Extra Battery integrates seamlessly with the DELTA Pro Ultra to create a robust Battery Energy Storage System (BESS) for backup power, energy management, and renewable integration.

Each Extra Battery adds an additional 6kWh of capacity.

Start with a single DELTA Pro Ultra unit, which comprises an inverter and one battery, and expand up to five extra batteries for a total of 30kWh of storage. This flexibility allows you to safeguard your property against prolonged outages, optimize solar self-consumption, or balance energy usage during peak demand periods.

Powered by Lithium Iron Phosphate (LiFePO₄) chemistry, the extra battery delivers safe, stable, and long-lasting energy. With 3,500+ life cycles before dropping to 80% capacity, it ensures reliable performance and cost-efficiency for over a decade of daily use.

  • Whole-home backup: extend coverage for critical loads during grid failures.

  • Renewable integration: store excess solar energy and use it on demand.

  • Business resilience: maintain uptime for essential systems and equipment.

  • Portable flexibility: the modular format makes it adaptable for mobile or off-grid setups when required.

Additional information

Weight50.7 kg
Dimensions66 × 45.5 × 20.4 cm
UPS

<20ms

AC Output

6900W total

Capacity

6144 Wh

Noise

Less than 30 dB.

Warranty

5 years

Warranty Timeline

ItemWarranty Period
RIVER 3 Plus
RIVER 3 Max
RIVER 3 Max Plus
RIVER 3 Series Smart Extra Battery
5 years
DELTA 3
DELTA 3 Plus
DELTA 3 1500
DELTA 3 Smart Extra Battery
5 years
DELTA Pro 3
DELTA Pro 3 Smart Extra Battery
5 years
DELTA Pro Ultra5 years
RIVER 324 months
110W Solar Panel24 months
Cables/Chargers/Adapters (inside the package/sold separately)24 months

Warranty

Visit our Returns Policy page for additional Warranty information.

Processing Time
Orders are usually processed and delivered within 3-5 business days, from our warehouse in the UK.

Actual delivery time depends on logistic conditions. 

Orders are not shipped or delivered on weekends or public holidays.

If we are experiencing a high volume of orders, shipments may be delayed by a few days. If there is a significant delay in shipping your order, we will contact you via email.

Delivery locations
Outpowered orders are shipped to most areas of mainland UK.

We do not offer shipping services to non-mainland UK regions (such as the Scottish Highlands, Scottish Islands, Northern Ireland, Isle of Scilly, Isle of Man, or the Channel Islands.

Returns
Visit our Returns Policy page to view our returns information.

While your 6900W output, EcoFlow DELTA Pro Ultra effortlessly runs even energy-hungry household items, including an EV charger. With X-Fusion, it guarantees a total 6900W output even during charging.

The system is expandable – you can connect up to five Extra Batteries, each adding 6kWh, for a maximum of 30kWh of usable capacity. This scalability ensures long-lasting backup and greater energy independence.

The battery pack is based on safe and secure LiFePO₄ chemistry and is IP54 waterproof-rated (battery module only).

So if you’re looking for more power…

Add up to five 6144Wh batteries to the EcoFlow DELTA Pro Ultra unit, taking the capacity to 30,000 Wh!

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Summary

Total energy consumption per day 0.000 kWh

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