4 Best Solar Generators For Flats in 2024 Reviewed

Flat owners and renters are becoming increasingly aware of how much energy they use and how much it costs. While it may seem that only homeowners can benefit from solar energy, that’s not true. 

If you live in a flat, you can still receive the benefits of solar generators, including reduced utility costs and less reliance on the grid. With power outages becoming increasingly common across the nation, these compact solar generators and portable power stations are becoming necessary no matter where you live.

Solar generators can supply sufficient energy for your flat’s energy backup needs, and because they don’t produce toxic emissions like fossil fuel generators, they can safely operate indoors. 

Whether you’re a landlord looking to install solar systems in your complex or a renter who wants an alternative to outlast the latest blackout, many great options are available. 

Here, we cover the best solar generators for flats and what to look for when making a purchase decision. 

4 Best Solar Generators For Flats 

Below, you’ll find the best solar generators available for flats in 2024. We’ll tell you its benefits and discuss the pros and cons of each. That way, you know exactly what you can expect from each product.

1. Ecoflow DELTA Pro + 400W Solar Panel

With its massive capacity of 3600 Wh, the Ecoflow DELTA Pro with a 400W portable solar panel is the most powerful solar generator for flats. And if that’s not enough to satisfy your power-hunger, you can expand it up to 25k Wh with Delta Pro Smart Batteries. This solar generator is perfect for handling appliances and devices such as your refrigerator, heater, lights, TV, and computer. 

The DELTA Pro delivers the most innovative LFP battery technology, guaranteed for at least 6500 charge cycles. Ecoflow’s X-Stream charging technology lets you charge the entire system from an AC wall outlet in just 1.8 hours!

The 400W solar panel has a foldable and portable design, letting you save space. Whether you live in a one-bedroom flat or a 3-bedroom loft, you don’t have to worry bout the DELTA Pro taking up valuable space. It will easily fit on any balcony, fire escape, or roof.

The unit features a multi-segment LCD screen displaying all the relevant statistics, such as input and output power, recharging time, activated sections, and other working states of the battery system. Pairing the generator with the EcoFlow app lets you monitor and control the entire system from your smartphone. 


  • Capacity: 3600Wh up to 25kWh
  • Weight: 99 lbs (45kg) 
  • Dimensions: 25 x 11.2 x 16.4 inches (63.5 x 28.4 x 42 centimeters)
  • Battery Type: LFP 
  • Battery Life Cycle: 6500 cycles to 80+ capacity  
  • AC Outlet Charging Time: 1.8 hours
  • Solar Panel Charging Time: 4 to 8 hours 


  • A large battery and inverter capacity supplies the entire flat with energy
  • Bluetooth and WiFi connectivity enables remote control for your solar system 
  • Fast recharging for areas with frequent outages 


  • Quite heavy — not ideal for taking up and down the stairs if you expect to move it often 

2. Ecoflow DELTA Max + 400W Solar Panel

The DELTA Max with the 400W solar panel is a robust solar generator at half the weight of the DELTA Pro.

At 2016Wh, it can charge a laptop over 60 times, power a full-sized refrigerator for nearly two days, and run a 32-inch LCD television for almost three days. This figure could potentially triple by expanding the capacity with an extra battery!

With its 3,600W dual charging capabilities and X-Boost technology, you can fully charge the DELTA Max quickly. Plugging it into an AC wall outlet can achieve a full charge in just 1.8 hours! 

The EPS Mode will allow the DELTA Max to start up automatically if your primary power source fails. Whether you’re concerned about natural disasters or occasional power outages, this is your solution for emergency preparedness.


  • Capacity: 2016Wh up to 6000Wh
  • Weight: 48 lbs (21.8kg) 
  • Dimensions: 19.6 x 9.5 x 12 inches (49.8 x 24.1 x 30.5 centimeters)
  • Battery Type: Lithium-ion 
  • Battery Life Cycle: 800 cycles to 80%+ capacity
  • AC Outlet Charging Time: 1.8 hours
  • Solar Panel Charging Time: 3.2 to 6.3 hours 


  • Plenty of available output options to charge all your home electronic devices
  • Strong power output and battery capacity that can run large appliances 
  • Offers an emergency supply mode 
  • Fast dual-charging capability


  • No Qi wireless charging 

3. EcoFlow DELTA 2 + 220W Bifacial Portable Solar Panel

If you’re searching for a compact solar generator that can last you for many hours, then the EcoFlow DELTA 2 + 220W Bifacial Portable Solar Panel is what you need. 

Despite its compact and lightweight design, the DELTA 2 has an impressive 1,024Wh storage capacity and up to 2200W of AC output. That’s enough to charge portable electronics like laptops, tablets, and smartphones, along with providing power to more demanding electronic appliances like refrigerators, blenders, air conditioners, toasters, and oscillating fans.

In fact, EcoFlowDELTA 2 can power 99% of home appliances using X-Boost.

EcoFlow DELTA 2 fast-charge from 0-80% in just 50 minutes when connected to a wall outlet. With 2 x 220W Bifacial Portable Solar Panels, you can recharge in 2.4 hours of direct sunlight (4.7 hours with 1 panel).

Fast recharge times help give you the power you need when you need it. 

On top of all that, EcoFlow DELTA 2 weighs only 12 kg compared to similar units that weigh more than twice as much. It’s a highly portable solar generator solution for flats.


  • Capacity: 1024Wh
  • Weight: 12kg
  • Dimensions: 40 x 21.1 x 28.1 cm
  • Battery Type: Lithium iron phosphate (LFP)
  • Battery Life Cycle: 3000 Cycles to +/-80% Capacity
  • AC Outlet Charging Time: 50 minutes to 80% capacity
  • Solar Panel Charging Time: 2.4 to 4.7 hours 


  • An efficient solar inverter with excellent surge protection 
  • Affordable price 
  • 1024Wh deep cycle battery means sufficient backup for outages
  • Backed by a five year warranty (no cycle life restrictions)


  • Can’t run high-wattage appliances for extended periods

4. Ecoflow River 2 Pro + 220W Solar Panel

R2P SG 1
R2P SG 1

The Ecoflow River 2 Pro + 220W Solar Panel offers a more compact and affordable design than DELTA 2 with the same high-efficiency 220W bifacial portable solar panel.

It’s the ideal solution for studios and one-bedroom flats with limited space. 

With a 768Wh storage capacity and 800W of AC output (1600W surge power) it’s a robust device, capable of charging multiple devices simultaneously.

It can run 80% of high-wattage appliances, so you can use it to run your coffee machine, hair dryer, television, and refrigerator. 

Proprietary X-Stream technology allows you to recharge the power station from zero to 100% in 70 minutes. With bright sunlight, the 220W bifacial portable solar panel charges the battery from 0% to 100% within 2-4 hours.

You can also monitor the charging status of the Ecoflow River 2 Pro solar generator via a dedicated smartphone phone app. 


  • Capacity: 768Wh 
  • Weight: 7.8kg
  • Dimensions: 270 x 260 x 226 mm
  • Battery Type: Lithium iron phosphate (LFP)
  • Battery Life Cycle: 3000 cycles to ~80% capacity 
  • AC Outlet Charging Time: 70 minutes
  • Solar Panel Charging Time: 2 to 4 hours 


  • Compact size yet packs a large power output suitable for smaller flats
  • X-Boost technology powers large appliances
  • Charges 0 to 100% in just over an hour
  • Lots of handy outlets 


  • Not suitable for extended power outages

What to Look for When Buying Solar Generators For Flats 

Various factors impact what solar generator is suitable for your flat. Here are some things you need to consider to choose the best solar generator for your needs. 

Battery Capacity 

A solar generator’s battery capacity measured in watt-hours determines how much energy it can store. Knowing the capacity can help you determine which appliances you can run and for how long. 

Take the EcoFlow DELTA 2, for example. With a 1024Wh capacity, it can run a 110W television for over 10 hours. 


When choosing a solar generator, you must consider how much wattage your flat needs. An average one or two-bedroom flat typically requires 20-30kWh per day.

To calculate your electricity use, you can check your electric bill or tally the wattage requirements for your home’s various essential appliances and devices. 

Number of Ports 

A portable solar generator’s number of ports will determine how many devices it can charge at once. Look for models with many ports available if you plan on charging several devices simultaneously. 

Portable generators with USB ports should have at least one or two ports, but some models offer four or even five. Also, don’t forget to look for a USB-C port if your devices require it. 

When using solar power for flats, you’ll want as many ports and USB connections as possible to facilitate charging many devices at once. 

With many EcoFlow solar generators, you can simultaneously power up to 13 devices. 

Battery Durability 

The quality of your solar generator’s battery will also affect its long-term viability. 

You can estimate the durability of a solar generator by the number of cycles the battery can withstand. With the EcoFlow DELTA Pro, you get 6500 cycles before it reaches 50% capacity—that means the DELTA Pro will hold up for years of use.

Modes of Charging 

A high-quality solar generator should have many charging options. Most solar generators have AC charging options — you can charge them from a standard wall outlet when sunlight is insufficient. 

Solar panels are the off-grid charging option. The amount of light exposure and the weather determine how long your generator takes to charge with solar energy.  

Finally, some generators include a car adaptor port, ideal for taking your solar generator with you on travels or for extended, city-wide outages when your vehicle might be the only power option.

Solar Panel Placement and Portability

Every flat is unique in where you can place the panels. For some, hanging a panel in the window can be an option. For others, the balcony, roof, or fire escape may be a viable option. 

Solar generators and panels with portability are ideal for flat use. You can quickly move the generator and panels to the optimal place to capture the most sunlight if necessary. 

Recharge Time 

Recharge time indicates how long your solar generator battery takes to recharge. AC power via wall outlets tends to be the fastest way to recharge a solar generator.

If the weather is cloudy and you don’t have direct sunlight, you may need a few days to charge some generators fully. With EcoFlow, you can expect your solar generator to recharge using solar panels within 4-8 hours.

Remember that sun exposure determines partially determines the efficacy of solar panels. Take this into account when calculating capacity and power requirements. If you plan to use the solar generator for mobile devices, lights, and a TV for several days, ensure the capacity and charge rate will provide the power you need. 

Although many models are capable of supplying power while charging, this will increase charging time, and you may be consuming energy faster than your battery can recharge.


It’s vital to look for generators that have component warranties. In particular, solar panels subject to rigorous conditions must be able to handle inclement weather. The best manufacturers will provide at least two-year warranties.  

At EcoFlow, you can receive warranties for as long as 36 months.

Solar Panel Compabitility

If you’re buying solar panels for a generator, make sure they’re compatible. Some solar panels don’t work with all generators. Whether your generator package includes a solar panel or not, knowing what to look for when shopping for a kit or upgrading the system is helpful.

The user’s manual should provide information about the type of solar panels you need and the maximum voltage and wattage they will support. It’s possible to damage a generator using the wrong solar panel – or simply be unable to recharge.

You should review the solar panel and generator documentation to ensure the power output is not too high for the generator’s input capacity.

EcoFlow solar panels offer universal compatibility, ensuring you can pair them with your EcoFlow portable power station or another generator. 

EcoFlow Portable Solar Panels

EcoFlow Solar Panels are the best option for flat dwellers. Built from lightweight monocrystalline silicon, these panels maximise energy absorption and help capture as much sunlight as possible. In particular, the Ecoflow 220W Solar Panel is double-sided, meaning you can collect 25% more energy than most other panels. 

These panels use an industry-standard solar connector compatible with EcoFlow generators and other manufacturers’ products.  


Here are common questions about solar energy for flats. 

What Are the Common Types of Solar Panels for Flats?

The most common types of solar panels for flats are monocrystalline and polycrystalline panels. Each varies in performance, appearance, cost, build quality, and installation. 

Monocrystalline panels are most likely the best option for flat dwellers. These single crystal panels have the highest conversion efficiency, meaning they can produce more kW per hour of electricity. 

That’s because the single silicon crystal gives flexibility and allows electrons to move more freely. Also, it has higher heat resistance, so it’s less affected by high temperatures. The downside is that it’s more expensive than other panel types. 

Polycrystalline panels have multiple silicon crystals, which reduces efficiency since it gives the electrons less flexibility to move. However, polycrystalline panels tend to be more affordable since the manufacturing process is more straightforward. 

Why Do You Need Solar Panels for Your Flat?

Renters can receive the same benefits from solar electricity as homeowners. They’ll save money on electric bills, reduce your carbon footprint and even make you eligible for tax incentives. 

Solar panels provide a clean and renewable energy source that helps support the Earth’s ecosystem by reducing carbon emissions. Solar panels can be hung in windows or placed on balconies for flats, making these solar systems accessible to individual tenants. Using renewable energy to cut electric bills is especially useful on the higher rate summer days. Furthermore, they are an ideal backup power source to keep your lights during power outages. 


There are a variety of benefits to using solar generators for your flat. 

By understanding what to look for and the differences each generator offers, you can find the best generator that suits your power consumption needs.

EcoFlow offers the most affordable and robust solutions for using solar power in your flat. All the products are easy to install and capture maximum sunlight for renewable energy.

EcoFlow’s solar generators offer clean energy, fast charging, and maximum efficiency to power up your flat.Shop our solar generators today!

EcoFlow is a portable power and renewable energy solutions company. Since its founding in 2017, EcoFlow has provided peace-of-mind power to customers in over 85 markets through its DELTA and RIVER product lines of portable power stations and eco-friendly accessories.


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