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The zero VAT rate under § 12 (3) UStG applies only to deliveries to Germany. Current delivery address: Germany.
Since 1 January 2023 a VAT rate of 0 % applies to certain photovoltaic products.
Up to 30 kWp no proof is required. The conditions are deemed met if the installed gross capacity of the system according to the Marktstammdatenregister does not and will not exceed 30 kilowatts (peak).
If the goods are not bought for a photovoltaic system — for camping, travel or resale, for example — the regular rate applies. Choose 19 % VAT in that case.
Should the conditions not have been met despite your confirmation, the statutory VAT may be charged afterwards.
Text of the law: § 12 (3) UStG. We do not provide tax advice — if in doubt, please consult your tax adviser.
Estimated dispatch: 29 October – 2 November (3–5 working days after payment)
6–30 kWh capacity for weeks of comfort.
A 6,900 W unit can easily power all your appliances.
5 ways to charge quickly – ready for use at any time.
Smart energy management via the EcoFlow app.
UPS with a 20 ms switchover time, very quiet (≤ 30 dB) below 2,000 W. X-Cooling and optimised performance thanks to the BMS.
5-year warranty.
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EcoFlow 45 W Mobile Solar Panel |
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EcoFlow 60 W mobile USB-C solar panel |
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EcoFlow 100 W flexible solar panel |
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EcoFlow 110 W mobile solar panel |
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EcoFlow NextGen 160 W mobile solar panel |
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EcoFlow NextGen 220 W mobile solar panel |
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EcoFlow 400 W mobile solar panel |
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EcoFlow Delta Pro Ultra EB Smart Additional Battery |
EcoFlow’s most powerful power solution for self-sufficient energy supply.
The DELTA Pro Ultra (inverter + battery) offers the highest power output and capacity of any portable EcoFlow power station. As well as offering enormous energy storage capacity and a flexible design, the DELTA Pro Ultra uses solar energy to power your most important devices – right up to your entire household – for weeks on end without interruption.

6–30 kWh capacity for weeks of comfort.
Experience a new level of energy reliability with up to 30 kWh of battery capacity. For an average household, this means weeks of basic power supply (duration depending on consumption). Stackable and space-saving – ideal for the garage or utility room.

A 6,900 W system effortlessly powers all your appliances – even power-hungry household appliances and even an electric vehicle charging point. Thanks to X-Fusion technology, power output remains constant at 6,900 W even whilst charging.
5 ways to charge quickly.
As well as solar and mains power, the system can also be charged via a petrol generator or an EV charging station. Thanks to an industry-leading charging speed of 8,800 W, you can fully charge two batteries in just 2 hours.

Round-the-clock energy management with EcoFlow OASIS.

Take it anywhere. The DELTA Pro Ultra can be transported effortlessly using the trolley. Portability applies exclusively to set-ups with a single battery; configurations with multiple batteries are intended for stationary use.
Backup – so quiet you’ll hardly notice it.
In the event of a power cut, the system takes over in just 20 ms and remains very quiet (≤ 30 dB) at power levels below 2,000 W – ideal for a home office or a peaceful night’s sleep.
Greater safety thanks to advanced design.
Reliable power – even under extreme conditions, whether in severe weather or freezing cold.
Technical specifications DELTA Pro Ultra (inverter):
| Dimensions (L × W × H): | 690 × 481 × 214 mm |
| Gross weight: | 41.7 kg |
| Net weight: | 32.1 kg |
| Maximum battery capacity: | 6 kWh (6,144 Wh) |
| Maximum expandable capacity: | 30 kWh (6,144 Wh × 5) |
| PV input: | High-PV: 80–450 V, 15 A, max. 4,000 W Low-PV: 30–150 V, 15 A, max. 1,600 W |
| AC input: | Charging: 100–120 V ~ 15 A; 200–240 V ~ 12.5 A, 50/60 Hz Bypass: 100–120 V ~ 15 A, 50/60 Hz (duration < 3 hours if the current exceeds 12 A) |
| Input/output power: | 100–120 V ~ 30 A 200–240 V ~ 30 A, 50/60 Hz |
| AC output: | Output: 230 V, 50 Hz, 6,900 W total power, max. 16 A (×4) per socket, max. 30 A (×1) per socket Bypass: 220–240 V, 50/60 Hz, 2,900 W total power, max. 12.5 A (×5) per connection |
| DC output: | 12.6 V⎓30 A, maximum 378 W |
| USB ports: | USB-C: 5/9/12/15 V – 3 A, 20 V – 5 A, max. 100 W (×2) per port, total 200 W USB-A: 5 V – 2.4 A, max. 12 W (×2) per port, total 24 W |
| Temperature range (charging/discharging/storage): | -20 °C to 45 °C |
| Operating humidity: | ≤ 90 % |
| Max. operating altitude: | ≤ 3,000 m |
| Operating noise: | ≤ 30 dB |
| UPS: | < 20 ms |
| Communication: | Wi-Fi 2.4 GHz / Bluetooth 5.0 |
| IP rating: | IP54 |
| Display: | LCD |
Technical specifications DELTA Pro Ultra (battery):
| Model: | EFYJ751-BP |
| Type: | Rechargeable Li-ion battery pack |
| Net weight: | 50.7 kg |
| Dimensions: | 660 × 455 × 204 mm |
| Capacity: | 102.4 V / 60 A, 6,144 Wh |
| Cell material: | LFP |
| Cycle life: | > 80% SoH after 3,500 cycles (charge/discharge rate 0.5C, 25 °C). |
| Protection functions: | Overvoltage, overload, overheating, short-circuit, low-temperature, undervoltage and overcurrent protection |
| Temperature (charging/discharging): | -20 °C to 45 °C. Storage: -20 °C to 45 °C (optimal 20 °C to 45 °C) |
| Max. operating altitude: | ≤ 3,000 m |
| Protection rating: | IP54 |
Data sheet
Specific References