10 Best Portable Electric Generator 2025 in the United States

The EF ECOFLOW DELTA Pro is a powerful portable generator designed mainly for home backup and outdoor use like camping or RV trips. It offers a large 3600Wh battery capacity with 3600W continuous output and a peak of 4500W, which means it can handle most household appliances and devices easily. Its battery is rechargeable by both solar panels and wall outlets, with fast charging times—about 1.8 hours on a 240V source and 11 hours from a single 400W solar panel. Using three panels can reduce this to just 3.5 hours, making it ideal for extended off-grid use. The included 400W solar panel is lightweight, foldable, and waterproof, so it’s easy to carry and use outdoors.

Portability is decent for its size, weighing 99 pounds, which is manageable but may require some effort to move around compared to smaller units. It has 15 different outlets including 5 AC outlets, USB-A and USB-C ports, and car power outputs, allowing you to power a wide range of devices simultaneously. The smart app control is a nice feature, letting you monitor and adjust settings remotely for convenience.

The absence of a traditional gas engine makes it quiet and eco-friendly but reliant on battery charge and sunlight. Noise level is low compared to gas generators, which is great for camping or home use. While its weight and price might be drawbacks for those needing a lighter or less expensive generator, the DELTA Pro is well-suited for users looking for a high-capacity, solar-ready generator with multiple outlets and smart control, especially for emergencies and outdoor activities. It combines good power output and charging flexibility with portability and quiet operation.

The EF ECOFLOW DELTA 3 is a powerful and versatile portable generator running on a lithium iron phosphate (LiFePO4) battery, offering 1024 watt-hours of power and up to 1800 watts output with a surge of 3600 watts using its X-Boost feature. It can power multiple household appliances or camping gear simultaneously—up to 13 devices at once. Its standout feature is the incredibly fast charging time, reaching full charge in just 56 minutes via AC or solar inputs, which is much quicker than many competitors. The battery is durable, rated for around 4000 cycles and designed to last about 10 years, providing good long-term value.

The unit is protected against splashes, dust, and oil, making it reliable in outdoor conditions. Portability-wise, it weighs about 27.5 pounds, which is manageable but on the heavier side compared to smaller generators. Noise levels stay below 40 decibels even at higher power use, so it won’t disturb your surroundings. It offers multiple outlets, including AC and USB-C, adding to its flexibility.

Since it’s battery-powered, runtime depends on connected devices and load. It’s expandable with extra batteries for increased power or longer use. This model is well-suited for camping, RV trips, and home backup during power outages, especially if you value quick recharge and quiet operation. However, if extended use without recharging is needed, a fuel-powered generator might be a better choice.

The EF ECOFLOW Solar Generator DELTA 2 Max is a powerful and versatile option for anyone needing portable electricity, especially for outdoor activities like camping or as a backup at home. It offers a strong power output of 2400W continuous and can handle surges up to 3400W, which means it can run most household devices and even some high-wattage appliances. It uses a clean, rechargeable LiFePO4 (LFP) battery, known for being long-lasting and safe, with up to 3000 charge cycles before losing much capacity. This makes it more durable and cost-effective over time compared to typical batteries.

Charging is impressively fast: you can get 80% power in just under an hour using a combination of AC and solar input, thanks to its ability to handle up to 1000W from solar panels. The generator is quite portable considering its capacity, weighing 71 pounds and sized compactly, although it will require some effort to carry around. On the noise front, it’s very quiet at about 30 decibels, so it won't disturb your peace while running overnight. It also provides plenty of outlets (15 total), letting you power multiple devices simultaneously. The expandable battery capacity up to 6kWh is a smart feature if you want more energy storage for longer use or power outages.

A potential downside is that at 71 pounds, it’s not the lightest option, so it may not be ideal for frequent carrying over long distances. Additionally, while fast charging is a benefit, it relies on good solar conditions or AC power sources nearby. This generator suits campers, RV users, and homeowners seeking a reliable, quiet, and clean power solution with a strong focus on battery longevity and fast charging.