How to Upgrade Your EcoFlow Battery Capacity


EcoFlow is a leading manufacturer of portable power stations and solar generators, providing backup power solutions with varying battery storage capacity levels. After purchasing one of the EcoFlow power solutions, you may want to expand the original capacity to accommodate more extended trips, heavier usage, or larger appliances. Luckily, EcoFlow offers extra batteries to make this dream a reality! 

Most of the DELTA series power stations have expandable capacity. In addition, you can expand the EcoFlow Power Kits to two or three times their original capacity. 

If you’re looking to upgrade your EcoFlow battery power, you can. Follow this comprehensive guide to find out which systems have expandable capacity and how you can get an upgrade.

Can I Upgrade My EcoFlow Battery?

Yes! Many of the EcoFlow Portable Power Stations come with expandable capacity. With the right connector cables, you can upgrade a product like the DELTA Pro and add extra DELTA Pro Smart Batteries to build out your system. 

EcoFlow offers several portable power station models with different specifications and features. Depending on your model, it may or may not be possible to upgrade the battery capacity. 

For example, the RIVER 2 series of Portable Power Stations is not expandable.

Upgrading Your EcoFlow Power Station

Upgrading your EcoFlow Portable Power Station is as simple as adding the corresponding Smart Extra Battery. Each solar generator model has its unique compatible extra battery. 


The DELTA 2 Portable Power Station comes with a 1024 Wh storage capacity. Adding the matching DELTA 2 Smart Extra Battery can expand your setup to 2048 Wh of electricity storage. 

Owning a DELTA 2 and an extra battery allows you to balance your energy requirements with your portability concerns. 

Just going out for a day trip? Bring the DELTA 2. 

Embarking on a weekend camping trip? Bring the extra battery to stay powered all weekend long!


The DELTA Max Portable Power Station comes equipped with a 2 kWh internal battery. You can add one or two DELTA Max Smart Extra Batteries to bring the total capacity to 4 or 6 kWh, respectively. 


The DELTA Pro is the king of portable power stations with a 3.6 kWh starting storage capacity. This model can expand its electricity storage with up to two DELTA Pro Smart Extra Batteries for a grand total of 10.6 kWh. That’s enough to supply backup energy for an average household’s energy consumption, an off-grid cabin, or an extended camping trip.

If you’re looking for the ultimate whole home backup power solution, you can max out the Advanced Kit with two DELTA Pros and four Smart Extra Batteries seamlessly chained together to offer 21.6 kWh of electricity storage and 7200W/240V of power output. 

The Advanced Kit can integrate with your home wiring and provide electricity backup for your whole house for up to a week.

Upgrading Your EcoFlow Power Kit

The EcoFlow Power Kits are an all-in-one modular solar solution for motorhomes, tiny houses, and other off-grid applications. They integrate seamlessly with existing electrical systems and are compatible with a range of EcoFlow solar panels. The freedom to customise lets you set up a solar system without worrying about the compatibility of different components or paying for more storage capacity than you need. 

After installing and using your Power Kit, you may want to expand the capacity. No problem! You can purchase more LFP batteries to increase your system capacity. 

For example, if you started with the 2 kWh Get Set Kit, you can purchase an additional 2 kWh battery to double your capacity. Similarly, if you began with a 5 kWh Kit, add one or two more 5 kWh LFP batteries to achieve 10 kWh or 15 kWh capacity. 

Once you reach 15 kWh storage capacity and a sizable solar array, you can achieve complete energy independence for your motorhome or off-grid cabin. 

Factors Affecting Battery Capacity

  • Usage: Your usage can affect capacity, as each cycle involves energy transfer between the battery’s electrodes. This discharge can cause wear and tear and impact performance. Over time, the number of discharge cycles can impact its capacity. EcoFlow’s batteries use advanced Lithium Iron Phosphate (LFP/LiFePo4) chemistry, meaning you get the longest lifespans (up to 10 years or more) and fastest recharge times on the market.
  • Environmental Factors: Environmental factors such as temperature, humidity, and altitude can affect capacity by altering the chemical reactions within the battery. Extreme temperatures, for example, can cause batteries to lose efficiency faster, while high humidity can accelerate corrosion and reduce the battery’s lifespan.
  • Maintenance: Following recommended maintenance practices can help ensure your battery performs optimally for a long time. Unlike other battery chemistries, like lead acid, LFP batteries require little to no maintenance.


What type of battery is in a portable power station?

Most EcoFlow portable power stations have a Lithium Iron Phosphate (LiFePO4) battery, including the RIVER 2, DELTA 2, DELTA Pro, and Power Kits. An LFP battery is a cutting-edge variation of the standard Lithium-ion battery. LiFePO4 batteries offer added safety, a longer life cycle, and a wide operating temperature range. 

What are the different types of EcoFlow batteries?

The EcoFlow DELTA 2 and DELTA Pro have a respective Smart Extra Battery that utilises LiFePO4 (LFP) technology. The RIVER 2 portable power station series also runs on LiFePO4 (LFP) batteries. The DELTA Max and Smart Extra Battery use Nickel Cadmium (Ni-Cad) battery chemistry. 

How can I upgrade my EcoFlow battery capacity?

You can expand the capacity of your EcoFlow battery by connecting additional batteries to your system. For instance, you can expand the 2 kWh Power Kit to 4 kWh storage by adding a 2 kWh battery. You can expand most of EcoFlow’s DELTA series Portable Power Stations and all of the Power Kits. 

Can I replace my old EcoFlow battery?

Attempting to replace your old EcoFlow battery may void your warranty and could be dangerous if not done correctly. Follow the manufacturer’s instructions for replacement or seek professional help. EcoFlow offers a trade-in program for eligible customers, allowing you to upgrade to a new EcoFlow product. 

What steps can I take to maintain maximum battery capacity?

To maintain maximum capacity, you should:
• Charge the power station regularly.
• Avoid exposing the power station to extreme temperatures. 
• Store your solar battery in a cool, dry place away from direct sunlight when possible. 
• Use the portable power station at least once every few months.

Final Thoughts

EcoFlow’s Portable Power Stations, Solar Generators, and Power Kits offer industry-leading lithium iron phosphate battery (LFP/LiFePO4)  technology, giving you the fastest recharge times and most extended lifespans on the markets.

By offering a wide range of storage and power output capacities — plus the option to expand your storage at any time — there’s sure to be an EcoFlow home backup or off-grid power solution that’s right for you.

Check out EcoFlow 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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