7 Best Solar Generators for Air Conditioners That Work
The best solar generators for air conditioners depends on your needs. The EcoFlow DELTA Pro is best for whole-home backup with 3600W output and expandable capacity, while the Anker SOLIX C2000 Gen 2 excels at fast charging with 100% power in just 58 minutes. For portable cooling solutions, the EF EcoFlow WAVE 3 stands out with its integrated 1800W air conditioner and cordless operation.
Running an air conditioner off solar power requires serious wattage and battery capacity. Most window AC units need 1200-2000W to start up, so you’ll want a generator that can handle peak loads without shutting down.
Quick Comparison Table
| Product | Continuous Output | Peak Power | Battery Capacity | AC Recharge Time | Expandable |
|---|---|---|---|---|---|
| EF EcoFlow WAVE 3 | 1800W cooling | N/A | 1024Wh | 75 minutes | Yes |
| SoftStart Home | N/A (Accessory) | Reduces by 70% | N/A | N/A | N/A |
| Ark3600 Extra Battery | 3600W | 4500W | 3840Wh | 3 hours | Up to 11520Wh |
| EcoFlow DELTA Pro | 3600W | 4500W | 3600Wh | 2.7 hours | Up to 25kWh |
| Grecell 330W | 330W | 600W | 230.88Wh | N/A | No |
| Anker SOLIX C2000 Gen 2 | 2400W | 4000W | 2048Wh | 58 minutes | Up to 4kWh |
| BROWEY 1600W | 1600W | 3200W | 1024Wh | 3 hours (80%) | No |
Best Solar Generators for Air Conditioners
1. EF EcoFlow WAVE 3 Portable Air Conditioner – All-in-One Cooling Solution
Best for: RV owners and van lifers who want a complete portable AC system with built-in battery power.
Key Features:
| Feature | Details |
| Cooling Power | 1800W / 6100 BTU |
| Heating Power | 2000W / 6800 BTU |
| Battery Capacity | 1024Wh LFP battery |
| Runtime | 8 hours cordless |
| Charging Speed | 75 minutes full charge |
The EF EcoFlow WAVE 3 is the best all-in-one solution for mobile cooling and heating needs. Unlike traditional solar generators that just power your AC, this unit combines both the air conditioner and battery in one compact package.
The 1024Wh LiFePO4 battery delivers 8 hours of cordless operation, perfect for overnight comfort in your RV or van. It charges incredibly fast at 1000W, reaching full capacity in just 75 minutes from AC outlets.
The cooling performance drops temperatures by 15°F in 15 minutes, handling spaces up to 180 square feet. The heating function adds versatility for year-round use in shifting climates.
APP control lets you adjust temperature and monitor power remotely. The sleep mode operates at just 44dB, and PetCare mode automatically activates cooling if your vehicle overheats.
At 20 inches, it fits easily in SUVs and includes mounting options for rooftops. The eco-friendly R290 refrigerant reduces carbon emissions significantly over its lifespan.
Pros:
- Complete AC and battery system
- Ultra-fast 75-minute charging
- 8 hours cordless operation
- Dual cooling and heating modes
Cons:
- Extra battery sold separately
- Limited to smaller spaces
2. SoftStart Home – AC Startup Power Reducer
Best for: Homeowners who want to run their existing central AC on a smaller solar generator or backup power system.
Key Features:
| Feature | Details |
| Startup Reduction | Up to 70% |
| Compatibility | Up to 6 tons |
| Voltage Range | 110-240V systems |
| Installation Time | 15 minutes DIY |
| Type | Soft starter accessory |
The SoftStart Home is the best accessory for reducing your air conditioner’s power demands. It’s not a generator itself, but a device that cuts AC startup current by up to 70%, letting you run larger units on smaller generators.
This soft starter works with all major HVAC brands and supports systems up to 6 tons or 72,000 BTUs. It eliminates the loud thump and light flickering that happens when your AC kicks on.
Installation takes just 15 minutes with included crimp-on connectors and zip ties. The compact design fits in tight spaces near your compressor unit.
By reducing inrush current, it extends compressor life by lowering heat buildup in motor windings. This prevents premature failure and reduces maintenance costs over time.
It’s ideal for off-grid solar systems, RV setups, and backup generators where every watt counts. The technology ensures smooth, quiet operation while maximizing your existing power capacity.
Pros:
- Reduces startup power by 70%
- Quick 15-minute installation
- Extends compressor lifespan
- Works with existing AC units
Cons:
- Requires separate power station
- Professional install recommended for some
3. Ark3600 Extra Battery – Massive Capacity Expansion
Best for: Off-grid homeowners needing extended runtime for central air conditioning and whole-home backup power.
Key Features:
| Feature | Details |
| Battery Capacity | 3840Wh expandable to 11520Wh |
| Rated Output | 3600W continuous |
| Peak Power | 4500W surge |
| Battery Type | LiFePO4 (4000+ cycles) |
| Output Ports | 15 total ports |
The Ark3600 Extra Battery is the best high-capacity option for running air conditioners for extended periods. With 3840Wh base capacity expandable to 11520Wh, it handles multiple AC units and appliances simultaneously.
The 3600W continuous output with 4500W peak power supports 99% of household appliances. This includes central air conditioning systems that require substantial startup current and sustained power.
EV-grade LiFePO4 batteries deliver over 4000 cycles and last up to 10 years. The robust construction ensures reliable performance through thousands of charge cycles.
Fast charging reaches full capacity in 1.29 hours with combined AC and solar input, or 3 hours with AC alone. Multiple charging methods include 2000W solar input for off-grid independence.
The telescoping handle and wheels make transport easy despite the large capacity. Bluetooth app monitoring lets you track performance and adjust settings remotely for maximum efficiency.
Pros:
- Massive 3840Wh capacity
- Expands up to 11520Wh
- 4500W peak power output
- 15 output ports available
Cons:
- Heavy and bulky design
- Premium price point
4. EcoFlow DELTA Pro – Premium Expandable System
Best for: Homeowners seeking a professional-grade solar generator with maximum expansion options and tax credit eligibility.
Key Features:
| Feature | Details |
| Battery Capacity | 3600Wh expandable to 25kWh |
| AC Output | 3600W (7200W paired) |
| X-Boost Power | Up to 4500W |
| Charging Time | 1.8 hours (240V) |
| Output Ports | 15 total methods |
The EcoFlow DELTA Pro is the best premium option with professional-grade features and massive expansion capability. The 3600Wh LiFePO4 battery expands from 3.6kWh to 25kWh with extra batteries and smart generators.
X-Stream fast charging technology fully recharges in 1.8 hours with 240V outlets or 2.7 hours with standard 1800W outlets. Solar charging takes just 2.8 hours with four 400W panels.
The 3600W AC output expands to 4500W with X-Boost technology, or 7200W when pairing two units together. This powers virtually any home appliance or heavy-duty equipment.
Fifteen output methods include multiple USB-A, USB-C 100W, AC outlets, DC ports, car power, and Anderson ports. This versatility handles all your devices simultaneously.
The system qualifies for 30% federal tax credit as residential clean energy property. Five charging methods include EV stations, solar, wall outlets, generators, and car charging.
Pros:
- Expands up to 25kWh capacity
- Ultra-fast 1.8-hour charging
- Eligible for 30% tax credit
- Dual unit 7200W output
Cons:
- High initial investment
- Expansion batteries cost extra
5. Grecell 330W with Solar Panel – Budget Entry Option
Best for: Campers and travelers needing basic power for small portable AC units or personal cooling devices.
Key Features:
| Feature | Details |
| Battery Capacity | 230.88Wh |
| AC Output | 330W (600W peak) |
| Solar Panel | 40W included |
| USB-C PD | 60W fast charging |
| Weight | 7.3 lbs + 2.93 lbs panel |
The Grecell 330W is the best budget-friendly option for powering small personal air conditioners and camping gear. The 230.88Wh capacity with included 40W solar panel provides basic off-grid cooling capability.
The 330W continuous output with 600W surge handles laptops, mini-fridges, CPAP machines, and small portable AC units. Pure sine wave output protects sensitive electronics from damage.
Six output ports charge multiple devices simultaneously, including 60W USB-C PD for fast laptop charging. Built-in MPPT controller maximizes solar efficiency from the included foldable panel.
At just 7.3 pounds for the power station and 2.93 pounds for the solar panel, it’s lighter than most competitors. The compact design fits easily in backpacks or vehicle storage.
Upgraded BMS protects against overload, overcharge, and short circuits. Dual silent fans maintain safe operating temperatures even when running multiple devices.
Pros:
- Affordable complete kit
- Solar panel included
- Ultra-lightweight design
- 60W USB-C fast charging
Cons:
- Limited 230Wh capacity
- Only for small AC units
6. Anker SOLIX C2000 Gen 2 – Ultra-Fast Charging Champion
Best for: RV owners and home backup users who prioritize lightning-fast recharging and efficient power management.
Key Features:
| Feature | Details |
| Battery Capacity | 2048Wh expandable to 4kWh |
| Rated Output | 2400W continuous |
| Peak Power | 4000W surge |
| Charging Speed | 100% in 58 minutes |
| Idle Consumption | Only 9W |
The Anker SOLIX C2000 Gen 2 is the best option for users who need incredibly fast recharging and efficient power usage. It reaches 80% charge in 45 minutes and 100% in just 58 minutes.
The 2400W rated output with 4000W peak power handles most window and RV air conditioners effortlessly. Ultra-efficient 9W idle consumption reduces conversion loss and extends runtime significantly.
The 2048Wh capacity powers a dual-door refrigerator for up to 32 hours, or 64 hours with the expansion battery. This efficiency means more cooling time per charge cycle.
Six recharging methods provide maximum flexibility, including 800W UltraFast alternator charging that reaches 100% in 3 hours while driving. This makes it ideal for mobile applications.
LiFePO4 battery technology ensures long lifespan and reliable performance. The expandable design lets you add capacity as your power needs grow over time.
Pros:
- Fastest charging at 58 minutes
- Ultra-low 9W idle consumption
- 4000W peak power output
- 800W alternator charging
Cons:
- Smaller base capacity
- Expansion battery sold separately
7. BROWEY 1600W – Built-In Solar Panel Innovation
Best for: Outdoor enthusiasts who want integrated solar panels and don’t want to carry separate charging equipment.
Key Features:
| Feature | Details |
| Battery Capacity | 1024Wh LiFePO4 |
| AC Output | 1600W (3200W peak) |
| Solar Panels | Built-in with MPPT |
| USB-C PD | 100W output |
| Battery Cycles | 3000+ to 80% |
The BROWEY 1600W is the best innovative design with built-in solar panels for convenient charging anywhere. This iF Design Award 2022 winner combines portability with high performance in a unique package.
The 1600W continuous output with 3200W peak power runs refrigerators, CPAP machines, tools, and medium-sized air conditioners. Pure sine wave output ensures safe operation for sensitive electronics.
Built-in solar panels with MPPT controller deliver faster solar charging without carrying separate equipment. You can also connect additional solar panels to increase charging efficiency further.
LiFePO4 battery technology provides 3000+ cycles to 80% capacity, lasting over 10 years. Advanced BMS protects against overvoltage, overheating, and short circuits for safe operation.
Eight output ports including 100W USB-C PD handle multiple devices simultaneously. The unit charges to 80% in just 3 hours using AC adapter and USB-C port together.
Pros:
- Built-in solar panels included
- Award-winning design
- 3200W peak power
- 100W USB-C PD output
Cons:
- Only 40W built-in solar
- Not expandable capacity
How to Choose Best Solar Generators for Air Conditioners
Power Output Requirements
Your solar generator must provide enough continuous wattage to run your air conditioner plus handle the startup surge. Most AC units need 1.5-2 times their running wattage just to start the compressor.
Check your AC unit’s label for running watts and startup watts. Choose a generator with at least 20% more capacity than your AC’s peak demand to avoid overload shutdowns.
Battery Capacity and Runtime
Battery capacity measured in watt-hours determines how long your AC will run. A 1000W air conditioner needs 1000Wh per hour, so a 3000Wh battery provides roughly 3 hours of cooling.
Consider your typical usage patterns and whether you’ll have solar charging available. Larger capacity means longer runtime but higher cost and weight.
Charging Speed and Methods
Fast charging minimizes downtime between cooling sessions. Look for generators that support multiple charging methods including AC outlets, solar panels, and car charging.
Solar input capacity matters for off-grid use. Higher wattage solar input means faster recharging during daylight hours, especially important for extended camping trips or emergencies.
Battery Chemistry and Lifespan
LiFePO4 batteries last significantly longer than standard lithium-ion, typically 3000-4000 cycles versus 500-1000 cycles. This translates to 10+ years of daily use versus 2-3 years.
While LiFePO4 costs more upfront, the extended lifespan makes it more economical long-term. It’s also safer with better thermal stability and lower fire risk.
Portability and Expansion Options
Consider weight and size if you’ll move the unit frequently. Wheels and handles make transport easier for larger capacity models that weigh 50+ pounds.
Expansion capability lets you add battery capacity as needs grow. Some systems expand from 3kWh to 25kWh, providing flexibility without replacing your entire setup.
Frequently Asked Questions
What size solar generator do I need to run a 5000 BTU air conditioner?
You need at least 1500-2000W continuous output with 2500-3000W peak power for a 5000 BTU AC. Battery capacity of 2000Wh or more provides 2-3 hours of runtime.
Can I run a central air conditioner on a solar generator?
Yes, but you need a high-capacity unit like the EcoFlow DELTA Pro with 3600W+ output and a soft starter to reduce startup surge. Central AC typically requires 3000-5000W to operate.
How long will a 2000Wh solar generator run an air conditioner?
A 2000Wh battery runs a 1000W AC for approximately 2 hours, accounting for conversion losses. Actual runtime varies based on AC efficiency and ambient temperature.
Do I need a pure sine wave generator for air conditioners?
Yes, air conditioners with electronic controls require pure sine wave output to prevent damage and ensure efficient operation. All generators reviewed here provide pure sine wave power.
Can solar panels charge the generator while running the AC?
Most modern solar generators support pass-through charging, letting you run your AC while solar panels recharge the battery. This extends runtime during sunny conditions.
Final Thoughts
The EcoFlow DELTA Pro offers the best overall combination of power, capacity, and expansion options for running air conditioners reliably. For portable cooling, the EF EcoFlow WAVE 3 provides unmatched convenience with its integrated AC system.
Focus on continuous wattage, battery capacity, and charging speed when choosing your solar generator. Consider whether you need portability or maximum power, and don’t forget expansion options for future needs.
Pair any generator with a SoftStart device to reduce power requirements by 70% and extend both AC and battery lifespan significantly.