If an outage rolls through your neighborhood, do you need to keep a 3-ton central air conditioner running, or just keep the fridge, lights, and phones alive? That single question separates these two certified-refurbished EcoFlow power stations. Both use LFP battery chemistry, both come in Black, and both are listed as Certified - Refurbished, but they part ways on output, expandability, and portability. The DELTA Pro Ultra 12kWh is built for whole-home backup; the DELTA Pro 3600Wh is built to move with you. The listed-price gap between them is $3,600, so the decision is as much about your power appetite as your budget.
Quick verdict: If your priority is running heavy 120V/240V appliances during a long outage, the DELTA Pro Ultra is the clear choice. If you want the lower listed price, portability, and flexible charging, the DELTA Pro 3600Wh makes more sense. Once you know your appliance load, the decision becomes obvious.
| Product | Listed Price | Output | Expandable Capacity | Price Bar |
|---|---|---|---|---|
| EcoFlow DELTA Pro Ultra 12kWh | USD 4,999.00 | 7200W | 6kWh up to 90kWh | |
| EcoFlow DELTA Pro 3600Wh | USD 1,399.00 | 3600W (surge 7200W) | 3.6kWh up to 25kWh |
Where the DELTA Pro Ultra wins: The listed applications include automotive, back-up power, camping/hiking, home/garden, and recreational vehicle (RV) use, and it is positioned for whole-house backup scenarios. It also lists a 10-year / 3500-cycle battery life to 80%+ capacity.
Where the DELTA Pro 3600Wh wins: It offers flexible charging through an AC wall outlet, a 12V car adaptor, or solar panels, along with portable features like a USB port. A potential 30% Residential Clean Energy Credit may apply for qualified solar electric property costs, so check eligibility with your utility.
EcoFlow DELTA Pro Ultra 12kWh Power Station Lifepo4, Certified Refurbished
The DELTA Pro Ultra is the one to pick when your home is the load. It pairs an inverter and battery in one unit, supports 120V and 240V, and is sized to run heavy household appliances like a 3-ton central air conditioner. Capacity starts at 6kWh and can scale up to 90kWh if you add more units. The LFP chemistry and 10-year / 3500-cycle rating (to 80%+ capacity) point to long-term service. The trade-offs are straightforward: the higher listed price is the main hurdle, and this is not a unit you will want to carry around a campsite. Its charging mode is listed as MPPT, so plan a solar setup or another input path before an outage.
EcoFlow DELTA Pro 3600Wh Power Station Generator Certified Refurbished, LFP
The DELTA Pro 3600Wh is the more approachable choice with the lower listed price. It delivers 3600W of continuous AC output with a 7200W surge and can reach 4500W with X-Boost. It charges from an AC wall outlet, a 12V car adaptor, or solar panels, which makes it genuinely portable for camping, RV trips, or backup at home. A potential 30% Residential Clean Energy Credit may be available for qualified solar electric property costs, pending utility eligibility. Its main limitation is scale: expanding to 25kWh requires extra batteries or a smart generator, and to match the Ultra's 7200W continuous output you would need to pair two of these. For a single-unit setup, it covers essentials rather than whole-home heavy loads.
Final choice by use case:
- Whole-home backup with 240V heavy loads: choose the EcoFlow DELTA Pro Ultra 12kWh.
- Portable power, RV/camping, or essentials-only backup on a tighter budget: choose the EcoFlow DELTA Pro 3600Wh.
