10 Best Solar Backup Generators 2026 in the United States

The EF ECOFLOW DELTA 2 solar generator is a solid choice for those seeking a clean, quiet backup power source for home, camping, or RV use. Its 1024Wh LFP (LiFePO4) battery offers a long lifespan with over 3000 charge cycles, meaning you can rely on it for years without much battery wear. The 1800W power output can handle most household appliances and tools, making it comparable to traditional gas generators but without the noise or fumes. It comes with a 160W solar panel that’s optimized to capture energy efficiently, letting you recharge faster in sunny conditions. Plus, the unit supports expanding battery capacity up to 3kWh if you need more power over time.

With 15 outlets, it offers versatile options to connect various devices at once. On the portability side, it weighs about 17.6 kilograms (nearly 39 pounds), which is reasonable but might be a bit heavy for frequent carrying over long distances. The built-in inverter and battery management system ensure stable power delivery and safety during use. Charging can be done via solar panel, AC power, or car adapter, giving flexibility based on your situation.

Though it is a bit pricey compared to smaller models, the durability, fast charging, and multiple power outputs justify the cost for users needing reliable off-grid or emergency power. This unit fits well for campers, RV owners, or homeowners wanting a green and quiet alternative to gas generators.

The EF ECOFLOW DELTA 3 is a powerful and versatile portable solar backup generator designed for home backup, camping, and RV use. It features a substantial 1024Wh LiFePO4 battery, which is known for its long lifespan and durability—rated for about 4000 charge cycles and a 10-year daily use expectancy. This means it can last much longer than many other batteries on the market, making it a reliable long-term investment.

With an 1800W continuous power output and the ability to surge up to 2200W (3600W briefly with X-Boost), it can run up to 13 appliances at once, including high-demand devices. The inverter type is electronic, providing stable power suitable for sensitive electronics. The device supports fast charging including 500W solar input and a 1500W AC input, allowing a full charge in under an hour, which is excellent for quick turnaround during emergencies or outdoor trips.

Solar panel compatibility is good, though solar panels are sold separately. The system supports expansion up to 5kWh by adding extra batteries, giving users flexibility to increase capacity when needed. EcoFlow also emphasizes durability with an IP65 rating on the battery pack, protecting it from dust, splashes, and oil, which is beneficial for outdoor use.

Portability-wise, the unit weighs 27.5 pounds (about 12.5 kg) and has a compact design, making it manageable but not ultra-lightweight. It offers multiple charging options including AC wall, car, and solar charging, which adds to its convenience. One minor downside is that the solar panels are optional extras, so the cost can increase if you want a complete solar solution. Also, while the weight is reasonable for its capacity, it may not be the best choice if you need something very lightweight for backpacking.

The DELTA 3 is a robust, fast-charging solar generator with excellent battery life and power output suited well for home backup and outdoor activities where multiple devices need reliable power.

The Anker SOLIX C1000 Gen 2 is a strong choice if you want a portable solar backup generator that can handle serious power needs. Its 1,024Wh battery capacity is big enough to run multiple devices, and with 2,000W continuous output (3,000W peak), it can support things like laptops, small appliances, and even some power tools. The built-in LiFePO4 battery means it’s designed to last a long time—up to 10 years or 4,000 charge cycles with 80% capacity remaining. One standout feature is the fast charging: it can recharge fully in just 49 minutes using AC power or in about 1.8 hours with the included 200W bifacial solar panel setup, which is quite efficient for solar generators.

The device supports up to 600W of solar input, giving you good flexibility to stay off-grid. It also includes 9 power ports, making it easy to plug in multiple devices at once, and features a quick UPS switchover to keep important equipment running without interruption. Portability is decent—it’s lighter and smaller than similar models but still weighs nearly 30 pounds, so it’s portable but might not be ideal for very long hikes. The build quality feels solid with a mix of plastic and aluminum, and the Anker app adds value by letting you monitor and schedule power use to save money. If you’re camping or need reliable backup power at home, this generator fits well.

On the downside, the weight and size may be a bit bulky compared to smaller units, and while the solar panel included is efficient, you might need additional panels if you want faster or more extended solar charging. The 5-year warranty is reassuring but shorter than some competitors. To sum up, the Anker SOLIX C1000 Gen 2 delivers powerful, fast-charging, and durable solar backup power with useful smart controls, making it a solid option for campers and home users who want reliable off-grid energy without complicated setup.