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EcoFlow RIVER 3 Plus Extra Battery 300Wh

🔥 On Sale! Promo is only until September 30th

Authorized EcoFlow Dealer
Authorized EcoFlow Dealer
Official Manufacturer Warranty
Availability: In Stock. Secure your order TODAY!
📦
SKU: EFEB300
  • Free Shipping & No Tax!
  • Ships in 1-5 Business Days
  • Up to 24-Hour Blackout Runtime with 2 Batteries
  • Industry-Leading X-Stream Fast Charging
  • Long-Lasting LFP Battery Tech (10+ Year Lifespan)
  • Sustainable Solar-Ready Power Anywhere
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Mon-Fri: 10am-5pm CST

After hours? Chat with Oaky, our 24-hour AI concierge!


More Power for Your RIVER 3 Plus, Whenever You Need It

The EcoFlow RIVER 3 Plus Smart Extra Battery expands your RIVER 3 Plus up to 858Wh, giving you more runtime for longer outages or bigger trips. It's one of the accessories we carry for our EcoFlow Generators lineup, and it's available in two sizes, the EB300 (286Wh) and the EB600 (572Wh), so you can pick the capacity that fits your needs.

EcoFlow RIVER 3 Plus Smart Extra Battery

Why You Need the RIVER 3 Plus Smart Extra Battery

A single RIVER 3 Plus can only carry so much charge on its own. Stack the EB300 or EB600 on top of it, one at a time, to reach up to 858Wh of total capacity, so you can keep essential devices running longer without needing a bigger power station. It also adds a second USB-C charging option and can be used completely on its own when you want to travel light.

EcoFlow RIVER 3 Plus Smart Extra Battery Features

EcoFlow RIVER 3 Plus Smart Extra Battery, overhead view

Expandable Up to 858Wh

Choose either the EB300 (286Wh) or the EB600 (572Wh), and simply stack one at a time on your RIVER 3 Plus to reach up to 858Wh of total capacity as your energy needs grow.

EcoFlow RIVER 3 Plus Smart Extra Battery, expandable capacity chart

An Extra Charging and Recharging Option

The Extra Battery adds a 140W USB-C port to your setup, giving you a convenient way to charge more devices or recharge your RIVER 3 Plus itself. Since it works independently, you get the freedom to use just the Extra Battery on its own when you don't need the full system.

EcoFlow RIVER 3 Plus Smart Extra Battery, extra charging and recharging

Hassle-Free Pogo Pin Connection

Using Pogo Pin technology, the Extra Battery connects to your RIVER 3 Plus wirelessly, fastening in place with simple clips instead of cables or screws. It's plug-and-play within seconds.

EcoFlow RIVER 3 Plus Smart Extra Battery, plug-free connection

Lightweight Enough to Use on Its Own

At just 7.7 lb, the EB300 is lighter than the RIVER 3 Plus itself, with a compact design and its own USB-C input and output. That makes it a convenient, standalone option for short outdoor trips where you only need to power a few devices.

EcoFlow RIVER 3 Plus Smart Extra Battery, used while camping

10-Year Lifespan with LFP Battery Tech

The Extra Battery uses the same LFP battery technology as the RIVER 3 Plus and is backed by a 5-year warranty, giving you worry-free, long-lasting performance for up to 10 years from a single investment.

EcoFlow RIVER 3 Plus Smart Extra Battery, front view

EcoFlow RIVER 3 Plus Smart Extra Battery Specs

Extra Battery 300 (EB300)

  • Capacity: 286Wh
  • Dimensions: 9.2 x 8.8 x 4.3 in
  • Net Weight: 7.7 lb
  • Battery Chemistry: LiFePO4, 3000 cycles to 80% capacity
  • USB-C Output: 1 port, 5V/9V/12V/15V at 3A Max, 20V/28V at 5A Max, 140W Max
  • USB-C Input: 5V/9V/12V/15V at 3A Max, 20V/28V at 5A Max, 140W Max

Extra Battery 600 (EB600)

  • Capacity: 572Wh
  • Dimensions: 9.2 x 8.8 x 6.2 in
  • Net Weight: 12.8 lb
  • Battery Chemistry: LiFePO4, 3000 cycles to 80% capacity
  • USB-C Output: 1 port, 5V/9V/12V/15V at 3A Max, 20V/28V at 5A Max, 140W Max
  • USB-C Input: 5V/9V/12V/15V at 3A Max, 20V/28V at 5A Max, 140W Max
EcoFlow RIVER 3 Plus Smart Extra Battery, powering a TV and console
Questions About the RIVER 3 Plus Smart Extra Battery? Chat, Call, or Text us We can help you pick the right size for your setup! Call for the best deal. 1-844-945-3625

Frequently Asked Questions

What's the difference between the EB300 and EB600?

The EB300 adds 286Wh of capacity and weighs 7.7 lb, while the EB600 adds 572Wh and weighs 12.8 lb. Both share the same battery chemistry, USB-C input and output, and dimensions aside from height. Stacking both together on a RIVER 3 Plus gets you up to 858Wh total.

How does the Extra Battery connect to the RIVER 3 Plus?

It uses Pogo Pin technology to connect wirelessly, fastening in place with clips instead of cables or screws, so it's plug-and-play within seconds.

Can I use the Extra Battery without the RIVER 3 Plus?

Yes. It works independently, with its own USB-C input and output, so you can charge devices directly from the Extra Battery when you want to travel light.

How long will it last?

It uses the same LFP battery technology as the RIVER 3 Plus, rated for 3000 cycles to 80% capacity, and is backed by a 5-year warranty for up to 10 years of use.

Can I stack more than one Extra Battery?

Yes. You can stack one Extra Battery at a time on your RIVER 3 Plus, and combining an EB300 and EB600 gets you up to 858Wh of total capacity.

×

Connect With Us

We'll help you pick the right size and find the best deal!

1-844-945-3625 📞 Call Now ✉️ Text Us Mon-Fri: 10am-5pm CST
After hours? Chat with Oaky, our 24-hour AI concierge!

A Brief Overview of the U.S. Home Energy Tax Credit

Discover the financial advantages of the U.S. federal solar tax credit for homeowners considering installing a solar system in their main residence. This incentive provides a 30% discount on the current cost of a solar system. If you've set up a system in 2022, it's advisable to speak with your tax consultant to see if you're eligible for a higher credit rate.

Understanding the U.S. Federal Solar Tax Credit:

This tax credit is tailored for homeowners and applies to solar systems installed in primary homes. The credit covers a percentage of qualifying expenses, and thanks to the recent Inflation Reduction Act, the scope of the Investment Tax Credit (ITC) has broadened. Solar systems installed from 2022 to 2032 are eligible for a 30% tax credit, which will drop to 26% in 2033 and 22% in 2034. There's no cap on the amount you can claim.

What Expenses Are Eligible:

Qualifying expenses include solar photovoltaic panels, attic fan power systems (except for the fan itself), labor costs for installation and setup, balance-of-system components, and applicable sales taxes. Standalone batteries with a capacity of 3 kWh or more may also be eligible! For instance, if the solar system you initially purchase includes a single battery with a capacity of less than 3 kWh, but you also buy extra batteries during the installation process that bring the total capacity to more than 3 kWh, then the entire setup may be eligible for the tax credit.

How to Determine Your Eligibility:

To confirm your eligibility for this federal solar credit, review the guidelines set forth by the U.S. Department of Energy and consult your tax advisor.

Steps to Claim the U.S. Federal Solar Tax Credit:

  1. Verify Eligibility: Speak with your tax advisor to confirm your eligibility and to understand how to make the most of the credit.

  2. Fill Out IRS Form 5695: This form, available online, is specifically for claiming renewable energy credits. Guidelines for completing the form are provided.

  3. Apply Credits on Your 1040: Use the total credit amount from Form 5695 to lessen your tax liability on your Form 1040.

Disclaimer:

Always consult your tax expert to fully understand your eligibility for tax credits based on your unique situation. Wild Oak Trail offers this guide for educational purposes and does not assure tax credits based on the information given. This resource should not replace professional tax or financial advice and should not be the only factor in your purchasing, investment, or tax choices. Consult a tax expert for a personalized evaluation.

Additional Resources:

EcoFlow Warranty Policy

Please note that the warranty period may vary according to local laws and regulations. Some countries, states, and provinces do not allow limitations on how long an implied warranty may last, so the limitation described above may not apply to you. You may have other rights from state to state, province, or country.

DO NOT USE YOUR PRODUCTS UNTIL YOU HAVE READ THE TERMS OF THE WARRANTY.

All EcoFlow products purchased come with a limited warranty, as shown below.

BY USING ECOFLOW PRODUCTS, YOU AGREE TO BE BOUND BY THE TERMS OF THE ECOFLOW LIMITED WARRANTY.

Wild Oak Trail provides a limited warranty for purchases according to EcoFlow's imposed warranty policy. The warranty period starts when the original purchaser receives the products.

WARRANTY TIMELINE

EcoFlow Warranty Timeline

Exclusions and Limitations

This warranty does not apply to:

· Non-quality related issues;

· Items purchased from outside of Wild Oak Trail;

· Purchases without valid proof of purchase;

· Items that have been refunded;

· Items that have expired their warranty period;

· Any defects or damages caused by misuse of products, unauthorized modification, dis-assembly or operation not in accordance with the official instructions or manuals;

· Any defects or damages caused by exposure to excessive heat, liquids or other external causes;

· Any defects or damages caused by reliability or compatibility issues when using unauthorized third-party parts;

· Lost or stolen products;

· Free products.

Cross-Regional After-Sales Service

Wild Oak Trail and EcoFlow does not provide a global product warranty, and the warranty service can only be obtained at a designated EcoFlow repair center.

To repair the product in an EcoFlow repair center when the product was purchased in another region, depending on part availability, customers can obtain a cross-regional repair service at an additional charge. (Some products do not support cross-regional repair even if the customer is willing to pay for the service. For more details, please contact Wild Oak Trail Customer Support.)

A cross-regional replacement service is not available for different versions of the same product.

The customer will need to bear customs duties, taxes, customs clearance, and other costs incurred for a cross-regional repair, regardless of whether it is the warranty or paid repair service. 

Valid Proof of Purchase

  • A purchase order number made through wildoaktrail.com;
  • Sales invoice or order confirmation email that clearly shows the description of the product, its price, and sales channel.

Return Material Authorization (RMA) process

  • Contact Wild Oak Trail Customer Support Team at customersupport@wildoaktrail.com or +1 (844)-945-3625.
  • If your item is eligible for an EcoFlow Warranty, you will receive a prepaid shipping label. Please follow the instructions provided by Dotti or Josh from Wild Oak Trail to properly pack the products and return them safely.
  • Please note that we can only provide return shipping labels for return packages in United States. 

Replacement 

  • In case of replacement, delivery of the replacement item will be arranged within 15 business days (subject to changes caused by force majeure) after confirming that the defective item has been received at our warehouse. The final resolution is subject to the availability of the replacement items.
  • The replacement warranty will be covered by a period equal to the remaining warranty period of the original item. 

Best Price Guarantee

You'll get the best price available at Wild Oak Trail! We'll match anyone who has it lower! 

We love to chat! Give us a call and we'll see what we can do to get you the best deal!

Conditions of our 100% Price Match Guarantee:

  • Contact us to discuss the Price Match so we can look up the competitors price

  • Buy one, get one free offers and Rebates are not eligible

  • The item must be in stock on the competitors website

  • The competitor must be an online store, not a retail location

  • The website can't be a discounter or auction website ( such as eBay, overstock, etc.)

  • The company must be an Authorized Retailer of the product in question

  • The Price Match Guarantee is based on the final price of the product including shipping and taxes

Why Buy From Wild Oak Trail? 

We’re a family-run business. My Wife Hailey and I run this business with our small staff of 3 awesome people. When you shop with Wild Oak Trail, you're supporting real people, not a big corporation.

We truly care. We’re here before, during, and after your purchase. Good products and great service—that’s how we earn your trust. We see and celebrate EVERY sale that comes in!

We choose quality. If we wouldn’t use it ourselves, we won’t offer it. Our goal is to make you happy enough to tell your friends.

Thanks for supporting our family and being part of the Wild Oak Trail community!

Description

More Power for Your RIVER 3 Plus, Whenever You Need It

The EcoFlow RIVER 3 Plus Smart Extra Battery expands your RIVER 3 Plus up to 858Wh, giving you more runtime for longer outages or bigger trips. It's one of the accessories we carry for our EcoFlow Generators lineup, and it's available in two sizes, the EB300 (286Wh) and the EB600 (572Wh), so you can pick the capacity that fits your needs.

EcoFlow RIVER 3 Plus Smart Extra Battery

Why You Need the RIVER 3 Plus Smart Extra Battery

A single RIVER 3 Plus can only carry so much charge on its own. Stack the EB300 or EB600 on top of it, one at a time, to reach up to 858Wh of total capacity, so you can keep essential devices running longer without needing a bigger power station. It also adds a second USB-C charging option and can be used completely on its own when you want to travel light.

EcoFlow RIVER 3 Plus Smart Extra Battery Features

EcoFlow RIVER 3 Plus Smart Extra Battery, overhead view

Expandable Up to 858Wh

Choose either the EB300 (286Wh) or the EB600 (572Wh), and simply stack one at a time on your RIVER 3 Plus to reach up to 858Wh of total capacity as your energy needs grow.

EcoFlow RIVER 3 Plus Smart Extra Battery, expandable capacity chart

An Extra Charging and Recharging Option

The Extra Battery adds a 140W USB-C port to your setup, giving you a convenient way to charge more devices or recharge your RIVER 3 Plus itself. Since it works independently, you get the freedom to use just the Extra Battery on its own when you don't need the full system.

EcoFlow RIVER 3 Plus Smart Extra Battery, extra charging and recharging

Hassle-Free Pogo Pin Connection

Using Pogo Pin technology, the Extra Battery connects to your RIVER 3 Plus wirelessly, fastening in place with simple clips instead of cables or screws. It's plug-and-play within seconds.

EcoFlow RIVER 3 Plus Smart Extra Battery, plug-free connection

Lightweight Enough to Use on Its Own

At just 7.7 lb, the EB300 is lighter than the RIVER 3 Plus itself, with a compact design and its own USB-C input and output. That makes it a convenient, standalone option for short outdoor trips where you only need to power a few devices.

EcoFlow RIVER 3 Plus Smart Extra Battery, used while camping

10-Year Lifespan with LFP Battery Tech

The Extra Battery uses the same LFP battery technology as the RIVER 3 Plus and is backed by a 5-year warranty, giving you worry-free, long-lasting performance for up to 10 years from a single investment.

EcoFlow RIVER 3 Plus Smart Extra Battery, front view

EcoFlow RIVER 3 Plus Smart Extra Battery Specs

Extra Battery 300 (EB300)

  • Capacity: 286Wh
  • Dimensions: 9.2 x 8.8 x 4.3 in
  • Net Weight: 7.7 lb
  • Battery Chemistry: LiFePO4, 3000 cycles to 80% capacity
  • USB-C Output: 1 port, 5V/9V/12V/15V at 3A Max, 20V/28V at 5A Max, 140W Max
  • USB-C Input: 5V/9V/12V/15V at 3A Max, 20V/28V at 5A Max, 140W Max

Extra Battery 600 (EB600)

  • Capacity: 572Wh
  • Dimensions: 9.2 x 8.8 x 6.2 in
  • Net Weight: 12.8 lb
  • Battery Chemistry: LiFePO4, 3000 cycles to 80% capacity
  • USB-C Output: 1 port, 5V/9V/12V/15V at 3A Max, 20V/28V at 5A Max, 140W Max
  • USB-C Input: 5V/9V/12V/15V at 3A Max, 20V/28V at 5A Max, 140W Max
EcoFlow RIVER 3 Plus Smart Extra Battery, powering a TV and console
Questions About the RIVER 3 Plus Smart Extra Battery? Chat, Call, or Text us We can help you pick the right size for your setup! Call for the best deal. 1-844-945-3625

Frequently Asked Questions

What's the difference between the EB300 and EB600?

The EB300 adds 286Wh of capacity and weighs 7.7 lb, while the EB600 adds 572Wh and weighs 12.8 lb. Both share the same battery chemistry, USB-C input and output, and dimensions aside from height. Stacking both together on a RIVER 3 Plus gets you up to 858Wh total.

How does the Extra Battery connect to the RIVER 3 Plus?

It uses Pogo Pin technology to connect wirelessly, fastening in place with clips instead of cables or screws, so it's plug-and-play within seconds.

Can I use the Extra Battery without the RIVER 3 Plus?

Yes. It works independently, with its own USB-C input and output, so you can charge devices directly from the Extra Battery when you want to travel light.

How long will it last?

It uses the same LFP battery technology as the RIVER 3 Plus, rated for 3000 cycles to 80% capacity, and is backed by a 5-year warranty for up to 10 years of use.

Can I stack more than one Extra Battery?

Yes. You can stack one Extra Battery at a time on your RIVER 3 Plus, and combining an EB300 and EB600 gets you up to 858Wh of total capacity.

×

Connect With Us

We'll help you pick the right size and find the best deal!

1-844-945-3625 📞 Call Now ✉️ Text Us Mon-Fri: 10am-5pm CST
After hours? Chat with Oaky, our 24-hour AI concierge!
Federal Solar Tax Credit

A Brief Overview of the U.S. Home Energy Tax Credit

Discover the financial advantages of the U.S. federal solar tax credit for homeowners considering installing a solar system in their main residence. This incentive provides a 30% discount on the current cost of a solar system. If you've set up a system in 2022, it's advisable to speak with your tax consultant to see if you're eligible for a higher credit rate.

Understanding the U.S. Federal Solar Tax Credit:

This tax credit is tailored for homeowners and applies to solar systems installed in primary homes. The credit covers a percentage of qualifying expenses, and thanks to the recent Inflation Reduction Act, the scope of the Investment Tax Credit (ITC) has broadened. Solar systems installed from 2022 to 2032 are eligible for a 30% tax credit, which will drop to 26% in 2033 and 22% in 2034. There's no cap on the amount you can claim.

What Expenses Are Eligible:

Qualifying expenses include solar photovoltaic panels, attic fan power systems (except for the fan itself), labor costs for installation and setup, balance-of-system components, and applicable sales taxes. Standalone batteries with a capacity of 3 kWh or more may also be eligible! For instance, if the solar system you initially purchase includes a single battery with a capacity of less than 3 kWh, but you also buy extra batteries during the installation process that bring the total capacity to more than 3 kWh, then the entire setup may be eligible for the tax credit.

How to Determine Your Eligibility:

To confirm your eligibility for this federal solar credit, review the guidelines set forth by the U.S. Department of Energy and consult your tax advisor.

Steps to Claim the U.S. Federal Solar Tax Credit:

  1. Verify Eligibility: Speak with your tax advisor to confirm your eligibility and to understand how to make the most of the credit.

  2. Fill Out IRS Form 5695: This form, available online, is specifically for claiming renewable energy credits. Guidelines for completing the form are provided.

  3. Apply Credits on Your 1040: Use the total credit amount from Form 5695 to lessen your tax liability on your Form 1040.

Disclaimer:

Always consult your tax expert to fully understand your eligibility for tax credits based on your unique situation. Wild Oak Trail offers this guide for educational purposes and does not assure tax credits based on the information given. This resource should not replace professional tax or financial advice and should not be the only factor in your purchasing, investment, or tax choices. Consult a tax expert for a personalized evaluation.

Additional Resources:

EcoFlow Warranty

EcoFlow Warranty Policy

Please note that the warranty period may vary according to local laws and regulations. Some countries, states, and provinces do not allow limitations on how long an implied warranty may last, so the limitation described above may not apply to you. You may have other rights from state to state, province, or country.

DO NOT USE YOUR PRODUCTS UNTIL YOU HAVE READ THE TERMS OF THE WARRANTY.

All EcoFlow products purchased come with a limited warranty, as shown below.

BY USING ECOFLOW PRODUCTS, YOU AGREE TO BE BOUND BY THE TERMS OF THE ECOFLOW LIMITED WARRANTY.

Wild Oak Trail provides a limited warranty for purchases according to EcoFlow's imposed warranty policy. The warranty period starts when the original purchaser receives the products.

WARRANTY TIMELINE

EcoFlow Warranty Timeline

Exclusions and Limitations

This warranty does not apply to:

· Non-quality related issues;

· Items purchased from outside of Wild Oak Trail;

· Purchases without valid proof of purchase;

· Items that have been refunded;

· Items that have expired their warranty period;

· Any defects or damages caused by misuse of products, unauthorized modification, dis-assembly or operation not in accordance with the official instructions or manuals;

· Any defects or damages caused by exposure to excessive heat, liquids or other external causes;

· Any defects or damages caused by reliability or compatibility issues when using unauthorized third-party parts;

· Lost or stolen products;

· Free products.

Cross-Regional After-Sales Service

Wild Oak Trail and EcoFlow does not provide a global product warranty, and the warranty service can only be obtained at a designated EcoFlow repair center.

To repair the product in an EcoFlow repair center when the product was purchased in another region, depending on part availability, customers can obtain a cross-regional repair service at an additional charge. (Some products do not support cross-regional repair even if the customer is willing to pay for the service. For more details, please contact Wild Oak Trail Customer Support.)

A cross-regional replacement service is not available for different versions of the same product.

The customer will need to bear customs duties, taxes, customs clearance, and other costs incurred for a cross-regional repair, regardless of whether it is the warranty or paid repair service. 

Valid Proof of Purchase

  • A purchase order number made through wildoaktrail.com;
  • Sales invoice or order confirmation email that clearly shows the description of the product, its price, and sales channel.

Return Material Authorization (RMA) process

  • Contact Wild Oak Trail Customer Support Team at customersupport@wildoaktrail.com or +1 (844)-945-3625.
  • If your item is eligible for an EcoFlow Warranty, you will receive a prepaid shipping label. Please follow the instructions provided by Dotti or Josh from Wild Oak Trail to properly pack the products and return them safely.
  • Please note that we can only provide return shipping labels for return packages in United States. 

Replacement 

  • In case of replacement, delivery of the replacement item will be arranged within 15 business days (subject to changes caused by force majeure) after confirming that the defective item has been received at our warehouse. The final resolution is subject to the availability of the replacement items.
  • The replacement warranty will be covered by a period equal to the remaining warranty period of the original item. 
Best Price Guarantee!

Best Price Guarantee

You'll get the best price available at Wild Oak Trail! We'll match anyone who has it lower! 

We love to chat! Give us a call and we'll see what we can do to get you the best deal!

Conditions of our 100% Price Match Guarantee:

  • Contact us to discuss the Price Match so we can look up the competitors price

  • Buy one, get one free offers and Rebates are not eligible

  • The item must be in stock on the competitors website

  • The competitor must be an online store, not a retail location

  • The website can't be a discounter or auction website ( such as eBay, overstock, etc.)

  • The company must be an Authorized Retailer of the product in question

  • The Price Match Guarantee is based on the final price of the product including shipping and taxes

Why Buy From Us

Why Buy From Wild Oak Trail? 

We’re a family-run business. My Wife Hailey and I run this business with our small staff of 3 awesome people. When you shop with Wild Oak Trail, you're supporting real people, not a big corporation.

We truly care. We’re here before, during, and after your purchase. Good products and great service—that’s how we earn your trust. We see and celebrate EVERY sale that comes in!

We choose quality. If we wouldn’t use it ourselves, we won’t offer it. Our goal is to make you happy enough to tell your friends.

Thanks for supporting our family and being part of the Wild Oak Trail community!

EcoFlow Shipping Details

All EcoFlow generators, portable power stations, and accessories are processed and shipped directly from our U.S. warehouse partners within 2 to 5 business days after your order is confirmed. Once your order has been dispatched, you will receive a confirmation email containing your tracking number so you can monitor the delivery status easily.

We proudly offer FREE standard shipping on EcoFlow generator and power station orders throughout the continental United States. Estimated delivery times may vary due to carrier schedules, peak holiday periods, or unforeseen delays beyond our control.

Some larger units, bundles, or accessory kits may arrive in multiple packages. If this occurs, tracking information will be provided for each shipment so you can follow their progress.

Please ensure your shipping address is complete and accurate at checkout. Wild Oak Trail is not responsible for delays, lost packages, or delivery issues resulting from incorrect address information.

If you do not receive a tracking update within 7–10 business days after your order ships, please reach out to our team at customersupport@wildoaktrail.com so we can assist you.