In the world of high-capacity portable power stations, Bluetti and EcoFlow stand out as two of the most reputable brands. The Bluetti AC500 vs EcoFlow Delta Pro are two of their most powerful offerings, providing massive energy storage, high output, and expandable battery options.
Both of these power stations cater to off-grid living, emergency backup power, and high-energy-demand applications. But which one is the better choice? In this in-depth comparison, we analyze the battery capacity, power output, charging capabilities, portability, and overall performance of these two powerhouses to help you determine the best option for your needs.
Contents
Differences Bluetti AC500 vs EcoFlow Delta Pro
Below is a summary of the specifications:
Battery Capacity and Expandability
The Bluetti AC500 has an impressive modular battery system, with a base capacity of 5,000Wh that can be expanded up to 18,432Wh using B300S battery packs. This makes it a great option for long-term power storage, extended off-grid use, and whole-home backup solutions.
On the other hand, the EcoFlow Delta Pro starts with a 3,600Wh capacity but can be expanded up to 25,000Wh with additional smart batteries and EcoFlow’s Smart Home Panel. This makes it one of the largest expandable power stations available, offering massive energy reserves for home energy independence and heavy-duty applications.
Winner: EcoFlow Delta Pro
While Bluetti offers a higher base capacity, the Delta Pro’s ability to expand up to 25,000Wh makes it a better long-term investment for users who need maximum energy storage.

Power Output and Device Compatibility
When it comes to power output, the Bluetti AC500 takes the lead with 5,000W of continuous power and 10,000W surge capacity, making it capable of running large appliances, power tools, and even electric vehicle charging.
The EcoFlow Delta Pro, while still highly capable, offers 3,600W of continuous output and a 7,200W surge capacity. This is more than enough to run refrigerators, heaters, air conditioners, and other household essentials, but it falls short of the AC500’s raw power capabilities.
Winner: Bluetti AC500
For high-energy appliances and heavy-duty applications, Bluetti’s higher power output makes it the superior choice.
Charging Speed and Solar Input
Charging speed is one of the most crucial factors when selecting a portable power station.
The Bluetti AC500 supports up to 3,000W of solar input, making it one of the fastest solar-charging power stations available. It also offers dual charging, combining AC and solar for a total input of up to 4,500W, which can fully charge the system in under two hours.
The EcoFlow Delta Pro, while still featuring fast-charging technology, maxes out at 1,600W solar input and 3,600W AC input. Although this is still faster than most other power stations, it does not match Bluetti’s ultra-fast charging capabilities.
Winner: Bluetti AC500
With faster solar charging and dual AC+solar input, Bluetti AC500 is the better option for off-grid users and solar power enthusiasts.

Portability and Weight
Despite offering higher output and capacity, the Bluetti AC500 is actually lighter at 66 lbs (30 kg) without batteries, making it easier to move compared to the EcoFlow Delta Pro. However, because it requires additional battery modules, its total weight can increase significantly when expanded.
The EcoFlow Delta Pro weighs 99 lbs (45 kg), making it less portable overall. However, EcoFlow includes built-in wheels and a telescoping handle, making it easier to transport despite its heavy weight.
Winner: EcoFlow Delta Pro
While Bluetti is lighter, the Delta Pro’s wheels and handle make it more convenient to move, giving it an advantage in portability.
Durability and Battery Lifespan
Both models use LiFePO₄ (LFP) battery technology, which is known for longevity, safety, and efficiency. Both power stations are rated for 3,500+ charge cycles, meaning they can last over a decade with regular use.
Winner: Tie
Both models offer long-lasting battery technology with excellent durability.
Quick Rundown Of Bluetti AC500
Quick Rundown Of EcoFlow Delta Pro
Conclusion
The Bluetti AC500 is the best choice for users who prioritize raw power output, fast solar charging, and a high base capacity. It is ideal for off-grid users, solar power enthusiasts, and those needing heavy-duty energy storage.
The EcoFlow Delta Pro, on the other hand, excels in expandability, portability, and smart home integration. Its ability to scale up to 25,000Wh and its built-in wheels make it more versatile for both home backup and outdoor use.
Final Recommendation
- Choose the Bluetti AC500 if you need higher power output, faster solar charging, and an expandable battery system.
- Choose the EcoFlow Delta Pro if you need a smart home backup solution, better portability, and maximum expandability.
For most off-grid power users, the Bluetti AC500 offers better overall performance, while EcoFlow Delta Pro is the better choice for whole-home backup solutions.