BLUETTI B300K Standalone Power Station/Expansion Battery (2764.8Wh)
BLUETTI B300K Standalone Power Station/Expansion Battery (2764.8Wh) additional 1BLUETTI B300K Standalone Power Station/Expansion Battery (2764.8Wh) additional 2BLUETTI B300K Standalone Power Station/Expansion Battery (2764.8Wh) additional 3BLUETTI B300K Standalone Power Station/Expansion Battery (2764.8Wh) additional 4BLUETTI B300K Standalone Power Station/Expansion Battery (2764.8Wh) additional 5BLUETTI B300K Standalone Power Station/Expansion Battery (2764.8Wh) additional 6BLUETTI B300K Standalone Power Station/Expansion Battery (2764.8Wh) additional 7BLUETTI B300K Standalone Power Station/Expansion Battery (2764.8Wh) additional 8BLUETTI B300K Standalone Power Station/Expansion Battery (2764.8Wh) additional 9BLUETTI B300K Standalone Power Station/Expansion Battery (2764.8Wh) additional 10BLUETTI B300K Standalone Power Station/Expansion Battery (2764.8Wh) additional 11
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£1,499.00 ex VAT£1,798.80 inc VAT

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Product features

  • 2764.8Wh expandable capacity
  • Modular scalable battery design
  • Reliable long-term energy storage
  • Advanced LiFePO₄ battery technology
  • Bluetti power station-compatible
  • Convenient USB-A charging port
  • Suitable for off-grid power
  • Expandable up to 16,588Wh
Product code: P-B300K-UK-GY-BL-010
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Description

The BLUETTI B300K Standalone Power Station & Expansion Battery adds a substantial 2764.8Wh of extra energy storage to compatible BLUETTI portable power stations. Compatible with the BLUETTI AC200L, AC200MAX, AC300 and AC500, this B300K Battery can be used as a powerful expansion battery or as a standalone power source, allowing you to charge essential devices directly from its integrated USB-A output.

For users seeking greater energy independence, the B300K offers outstanding scalability. When paired with compatible BLUETTI portable power stations, it allows you to build a customised energy storage system tailored to your requirements. Connected to an AC500 system, total storage capacity can be expanded up to an impressive 16,588Wh, making it ideal for home backup power, workshops, mobile businesses, caravans, motorhomes and off-grid living.

Unlike many expansion batteries, the BLUETTI B300K also functions as a practical standalone power source. Its integrated USB-A output allows you to charge everyday essentials such as smartphones, tablets, portable fans and other USB-powered devices without requiring connection to a power station, making it a useful companion for travel, camping and emergency preparedness.

Built around an automotive-grade LiFePO₄ battery, the B300K delivers exceptional durability, safety and long-term performance. With an impressive lifespan of over 4000 charge cycles to 80% original capacity, it is engineered to provide years of reliable energy storage while maintaining excellent battery health. Combined with BLUETTI's advanced AI-powered Battery Management System (AI-BMS), robust aluminium casing and efficient cooling technology, the B300K is designed to perform in demanding environments while protecting your investment.

Fast charging capability adds further convenience. When connected to the BLUETTI AC300 or AC500, the B300K can recharge to 80% capacity in as little as 45 minutes, helping minimise downtime and ensuring power is available when you need it most.

What's In The Box: B300K Expansion Battery, P090A Battery Expansion Cable (800mm), Documentation, Warranty.

Outputs: 1x USB-A Output: 12W Max. (5V / 2.4A), 2x Expansion Ports (58.4V DC Max., 90A Max.).

  • 2764.8Wh high-capacity energy storage | Expands up to 16,588Wh when paired with AC500
  • Compatible with BLUETTI AC200L, AC200MAX, AC300 & AC500 power stations
  • Functions as both a standalone power source & expansion battery
  • Built-in USB-A port for charging phones, tablets & other USB devices
  • Automotive-grade LiFePO₄ battery technology for enhanced safety & longevity
  • Delivers over 4,000 charge cycles for long-term reliability
  • Advanced AI-BMS battery management system for enhanced protection
  • Durable aluminium casing with efficient cooling design
  • Fast charging capability: Up to 80% charge in approximately 45 minutes when paired with AC300 or AC500
  • Ideal for home backup, off-grid living, caravanning, camping, mobile working & emergency power
  • Flexible modular design allows expansion with additional BLUETTI batteries

Technical Specifications:

  • Battery Capacity: 2,764.8Wh (51.2V, 54Ah)
  • Maximum Charging Current: 60A
  • Maximum Discharging Current: 70A
  • Battery Type: LiFePO₄ (Lithium Iron Phosphate)
  • Cycle Life: 4000+ Cycles to 80% Original Capacity
  • Net Weight: Approx. 29.5kg
  • Dimensions (L × W × H): 525mm x 327mm x 209mm

Please note, a P090D to P150D cable is required when connecting the B300K to a BLUETTI AC500 power station and is sold separately.

Code: P-B300K-UK-GY-BL-010

DELIVERY INFORMATION

Fast, reliable UK delivery

  • FREE UK delivery (2–3 working days) on orders over £99 exVAT (order before 4pm)*.
  • Orders under £99 exVAT are charged £8 inc VAT (£6.66 exVAT).
  • Need it quickly? Choose from our Next Working Day & Saturday delivery options below (order before 2pm).

Delivery options & rates

Delivery OptionDelivery TimeCost
Standard Delivery2-3 working days£8.00 (£6.66 exVAT)
FREE Standard Delivery (orders over £99 exVAT)*2-3 working daysFREE
Next Working Day Delivery (order before 2pm)Next working day£11.99 (£9.99 exVAT)*
Next Working Day by 12pm  (order before 2pm)Next working day£21.99 (£18.33 exVAT)
Next Working Day by 10:30am  (order before 2pm)Next working day£23.65 (£19.17 exVAT)
Saturday Delivery  (order before 2pm Friday)    Next working day£21.99 (£18.33 exVAT)
Northern Ireland, Highland  & Islands Delivery  3-5 working days£11.99 (£9.99 exVAT)

Important: Orders placed after 2pm on Friday (or over the weekend) are processed on Monday for next working day delivery. Next Day & Saturday Delivery options NOT available on all products.

*FREE Standard & Next day delivery available on select products and will be clearly shown on the product page.


What to expect

  • We dispatch Monday - Friday (excluding public holidays).
  • Once dispatched, you’ll receive tracking information (where available).
  • If delivery is delayed for any reason, we’ll contact you as soon as possible with an updated estimate.

Please note: we cannot be held responsible for missed deliveries. Customers are advised to check their spam or junk folder to ensure tracking information and estimated delivery details are received.


Specialist product delivery

Some products require specialist handling:

  • For Portable power please allow up to 4 working days for delivery.
  • Solar panels, battery storage, inverters, heat pumps and boilers are shipped via our pallet delivery service which costs up to £100.
  • In some cases a third-party supplier may fulfil your order directly.

Delivery areas & restrictions

  • Northern Ireland, Scottish Highlands & Channel Islands: please contact us for shipping rates.
  • Portable power to Northern Ireland: we can’t currently ship these items due to insurance issues with the courier.
  • International delivery: unfortunately we do not currently offer international shipping.

Questions, problems, or returns?

RETURN POLICY

Last updated May 23, 2024

Thank you for your purchase, we hope you are happy with it.

However, if you are not completely satisfied with your purchase for any reason, you may return it to us for a full refund, store credit, or an exchange; please see below for more information on our returns policy.

RETURNS

If you find you have received the wrong or damaged item(s), you need to contact us within 7 days of receipt of goods. Any time after this you are responsible for returning the goods at your own cost following the standard returns process.

All returns must be postmarked and in writing within fourteen (14) days of the purchase date. All returned items must be in a new, unopened and unused condition, with all original tags and labels attached.


RETURN PROCESS

To return an item, please click the ‘Download Returns Form’ below and complete all data fields. You can then email this to our team once completed.
Place your item(s) securely in its original packaging along with the returns form.
Please note that the RMA# on the returns address is your original order number; please ensure to reference this on the returns address, as per below.
You are now ready to mail your return to the following address:

Attn: Returns
RMA #/Order No -
Eco WizardUnderfloor Wizard Ltd t/a ECO Wizard
Beechfield House
Winterton Way
Macclesfield
Cheshire
SK11 0LP
United Kingdom

We ask that all customers when returning products send the goods via a trackable courier service. Underfloor Wizard Ltd t/a ECO Wizard will not be held responsible for goods which do not arrive at our premises.

Please note, you will be responsible for all return shipping charges, unless in the instance of damaged/faulty goods received in which case we can issue you with a returns label to cover the cost of postage.

Download Returns Form

REFUNDS

After receiving your return and inspecting the condition of your item, we will process your return or exchange. Please allow at least seven (7) days from the receipt of your item to process your return or exchange. Refunds may take 1-2 billing cycles to appear on your credit card statement, depending on your credit card company. We will notify you by email when your return has been processed.

Faults on installed products: 

If a product that has been installed develops a fault, please contact us, do not uninstall the product yourself. We will arrange for an engineer or technical support from the brand to assist with diagnosing the fault. Once the fault has been confirmed we can then arrange for the necessary next steps to occur.


EXCEPTIONS

The following items cannot be returned or exchanged:

  • opened box, damaged, missing or incomplete items cannot be returned.
  • items that have been installed.


QUESTIONS
If you have any questions concerning our return policy, please contact us at: returns@ecowizard.co.uk

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