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20kwh Energy Storage Battery
Battery 48v 400ah Lifepo4
48V Energy Storage Battery
20kwh dyness battery

JM Solar Battery Price 20kwh Battery 48v 400ah Lifepo4 Battery for Battery System

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Description

Product Summary:

  • Portability & Installation:
    • Ultimate portability and flexibility
    • Simple, convenient setup for hassle-free use
  • Design & Expandability:
    • Attractive appearance
    • Supports parallel connection (max. 15 units)
  • Performance & Eco-friendliness:
    • LiFePO4 battery pack (20.48kWh energy)
    • Pollution-free; cycle life exceeding 8000 times (long lifespan)
  • Safety & Intelligence:
    • JBD-200A-16S intelligent BMS (prevents overcharging, overdischarging, overheating)
    • LCD + built-in WiFi for real-time monitoring
    • Customizable display (touch/push-button) & Bluetooth/WiFi
  • Compatibility:
    • Works with most well-known inverters (e.g., DEYE, Growatt, PYLONTECH)
  • Specs & Warranty:
    • Max charge/discharge current: 200A (each)
    • Operating/storage temp: -20ºC~60ºC
    • Dimensions: L1130W424H200mm; Weight: 100kg
    • 10-year warranty
  • Customization:
    • Customizable capacity, specs, and OEM/ODM services
    • Customizable communication modes (CAN/RS485/R232)

20kwh Battery Backup Product Parameters:

Model
  JM-51.2V400Ah-LED
Nominal Voltage
  51.2V
Rated Capacity
  400Ah
Battery Energy
  20.48kWh
Operating Voltage Range
  48V~58.4V
BMS
  JBD-200A-16S
Support Inverter Brands
  DEYE, Growatt, PYLONTECH, SMA, MUST, VICTRON,GOODWE,
  Also Support Customized Other Inverter Brands
Battery Type
  LiFePO4 Battery Pack
Maximum Charging Current
  200A
Maximum Discharge Currentt
  200A
Product Size
  L1130*W200*H742 mm
Weight
 162kg
Battery Cycle Life
  ≥8000 Cycles
Storage / Working Temperature
  -20 ºC~60 ºC
Warranty
  10 Years
Parallel Connection Quantity
  15 Units MAX
Communication Mode
  CAN / RS485 / RS232
Display
  Touch Display / Push-Button Display
Bluetooth / WiFi
  Support Customized

20kwh Battery Backup Detailed Photos:

48v 400ah Lifepo4 Battery

lithium battery aa

400ah Lifepo4 Battery

20kwh Battery 48v 400ah

JM Company Profile:

JM Store
JM

FAQ:

What is the current 20kWh battery price, and is it a worthwhile investment for 2026?

The 20kwh battery price has become increasingly competitive, offering one of the best "price-per-kilowatt-hour" ratios in the energy storage market. By investing in a 48v 400ah LiFePO4 battery, homeowners can significantly reduce their levelized cost of energy (LCOE). Given the rising grid electricity rates and the shift toward VPP (Virtual Power Plant) programs, this system typically pays for itself within 5 to 7 years through peak-shaving and solar self-consumption.

 How long will a 20kWh battery last during a power outage?

One of the most common questions is: "How long will a 20kwh battery last?" For a standard 3-bedroom home, a 20.48kWh system provides substantial resilience:

  • Essential Loads (600W avg): Up to 34 hours (Lights, fridge, Wi-Fi, and security).

  • Moderate Loads (1500W avg): Approximately 13.5 hours (Essentials plus TV, laptop, and microwave).

  • High Loads (3000W avg): Roughly 6.8 hours (Essentials plus central A/C or electric heating). With a 20kwh battery backup for home, you are effectively protected against multi-day grid failures when paired with solar charging.

Is 20kWh enough to run a house off-grid?

Yes, for most modern energy-efficient homes, 20kWh is enough to run a house comfortably off-grid. However, it requires a balanced "Energy Budget." To achieve total independence, you should pair this 48v 20kwh lifepo4 battery with a solar array capable of producing at least 25–30kWh of energy daily to ensure the battery is replenished while simultaneously powering the home.

How many solar panels are needed to charge a 20kWh battery?

To calculate how many solar panels to charge a 20kwh battery, you must consider your "Peak Sun Hours."

  • In a region with 5 peak sun hours, you would need roughly 5kW to 6kW of solar panels to fully charge the battery from 0% to 100% in a single day (allowing for system efficiency losses).

  • The JM 20kWh system’s BMS supports high-current charging, allowing you to maximize large solar arrays for rapid replenishment.

Why choose a 48V 400Ah LiFePO4 architecture over high-voltage systems?

The 48v 400ah lifepo4 battery is the industry standard for residential safety and DIY-friendly installation. Unlike 400V+ high-voltage systems, a 48V battery system is safer to handle, requires less complex insulation, and offers superior compatibility with a vast range of off-grid and hybrid inverters like Deye, Victron, and Growatt. It provides the perfect balance between high capacity and low-voltage safety.

Can I expand my 20kWh solar energy storage system later?

Absolutely. This system is designed for expandable solar energy storage. Our JM-51.2V400Ah units support parallel connection of up to 15 units. This means you can start with a 20kwh battery storage unit today and scale up to 300kWh+ in the future, making it a future-proof solution for both residential and light commercial (C&I) applications.

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Shipping & Delivery

Shipping

FREE shipping on all orders retail only

Big Whosale goods needs to contact customer service

VAT & Customs Duties

All of the prices in our store include all cost, such as DDP shipping,

VAT/Tax, Customs duties... You don't need to pay any other fees.

Delivery Countries

Asia Pacific

Japan, Korea, Malaysia, Philippines, Singapore, Thailand, Australia, New Zealand

Europe

Austria, Belarus, Belgium, Bulgaria, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, United Kingdom

* Please note that certain regions in the UK – like the Isle of Jersey – can not be delivered at the moment.

* Please note that certain regions Spain – like the Canary Islands, hueda and Melilla – can not be delivered at the moment.

* Please note that certain regions Spain – like the Azores and Madeira – can not be delivered at the moment.

Middle East

UAE

North America

Canada, United States, Mexico

* Please note that certain regions in the USA – like the Isle of Alaska, Hawaii, Puerto Rico and Guam – can not be delivered at the moment. Our delivery methods only allow us to reach the Contiguous USA.

Is your required delivery country not included? Please feel free to contact us or email sales01@jmbatteries.com Please provide the shipping address and zip code to us, so that we can check the rate and service area to confirm if shipment is possible.

Our Delivery Time Information At A Glance

Total Delivery Time = Handling Time + Transit Time (+ any holidays and weekends)

Warehouse

Shipping Option

Handling Time

Estimated Delivery Time

US/CA

Fedex/DHL/UPS(Tax Free)

1~3 working days

3~7 working days

CN

By Sea+Express (Fedex/DHL/UPS, Tax Free)

3~7 working days

30 ~45 working days

Ship to USA/North America

Ship to EU

Warehouse

Shipping Option

Handling Time

Estimated Delivery Time

DE/POL

DHL/GLS/DPD/UPS/TNT(Tax Free)

1~3 working days

3~7 working days

CN

By Railway/Sea+Express (DPD/UPS/TNT, Tax Free)

3~7 working days

45 ~60 working days

 

Ship to Asia Pacific/Middle East

Warehouse

Shipping Option

Handling Time

Estimated Delivery Time

CN

By Sea/Railway+Express (DHL/GLS/DPD/Toll/UPS/Fedex/TNT, Tax Free)

3~7 working days

45~60 working days

* The above transportation time is only the reference time of most orders, excluding inspection time or other special times, such as natural accidents, congestion, and other uncontrollable factors.

* The tracking will be updated after pick up by local express. Please wait patiently or contact us for help.

* Countries that do not appear in the table, Please Click Here to consult us for freight charges.

Shipping Notice

When you place an order, be sure to enter the correct name, address, and contact information so that we can deliver your items successfully.

If you enter the wrong address, please contact us in a timely manner. We will contact logistics personnel to solve the problem. JMBatteries orders can only be shipped to the country where the order is placed.

If you ask to change the address after the order has been shipped, we cannot guarantee that your order will be updated. In addition, you are responsible for all possible risks and expenses caused by changing the address after the order has been shipped.

JMBatteries assumes no responsibility for delayed or rejected orders due to the following reasons:

  1. Shipping time might be delayed for 1-2 days for transportation to remote regions.
  2. Delay or delivery failure because of the consignee’s actions. These actions include, but are not limited to: changing the address after shipment, entering an unknown address or wrong address, entering incorrect contact information, and refusal to receive, etc.
  3. Delay due to force majeure. “Force majeure” means an unforeseen, inevitable, or insurmountable objective situation and other objective conditions that cause delayed shipping, including, but not limited to: national or regional air or ground transportation system controls or interruptions (e.g., weather reasons), communication system interference or malfunction, government actions, postal administration policy changes, wars, earthquakes, typhoons, floods, fires, heavy rain, heavy fog, and other similar events.
  4. Aviation contraband, mobile phones, electronic products, fragile products, and other products that are not available for air freight service due to aviation security regulations.
  5. Shipments that are confiscated or disposed of due to a violation of transportation regulations.
  6. Mail and packages cannot be delivered to the consignee’s address during weekends, national holidays, and festivals.
  7. The consignee address is a school, unit, or residential community where the courier has no access.

Order And Logistics Tracking

Notification

After the order is shipped, you will receive a notification email or SMS containing the waybill number (you need to confirm SMS notifications when placing the order).

Tracking Your Order

Please track your order on our Track order page or log in to the express company’s official website to check your package shipment status.

Inspection And Sign

As JMBatteries products are generally quite valuable, please inspect the package upon delivery. If it’s damaged or deformed, do not sign the delivery or open the package. In such cases, please contact us.

Once you (or someone else on your behalf) signs for the item, JMBatteries will consider this your acceptance of the package, quantity, and product. To protect your rights, you are highly recommended to shoot a complete unboxing video and check the items according to the packing list. If items are missing or damaged, please contact us within 24 hours after you receive the package so that we can resolve the problem immediately.

Security

JMBatteries values your privacy and will keep all information confidential. We will never sell or use your information for any other purpose than to deliver your order.

If you have any further questions, please contact us.

Email: sales01@JMBatteries.com

Phone/WhatsApp: +86 159 9974 9684  | Hours 9 – 6 Pm, Monday~Friday, (GMT+08:00)

Return & Refund Policy

Thank you very much for choosing JMBatteries. We guarantee that all JMBatteries products are strictly tested by our quality inspector before delivery. If you have any questions after receiving the products, please contact us by email: sales01@JMBatteries.com.

Return Policy

We have a 30-day return policy, which means you’ll have 30 days to request a return after receiving your item. After you email us to apply for a return, we will reply to you in 24 hours.

To be eligible for a return, your item must be in the same condition that you received it, unworn or unused, with tags, and in its original packaging. You’ll also need to provide a receipt or proof of purchase when applying for a return.

Shipping Cost

The shipping cost for returning the products will be borne by JMBatteries or the customer by following situations.

When JMBatteries Pays For Return Shipping

JMBatteries Time will pay for the cost of return shipping if the reason for the return was the result of OUR error.

Examples of instances may include:

Item arrived defective and cannot be fixed with a replacement part.

We shipped out the wrong item.

We shipped it to the wrong address.

We shipped a duplicate order.

Item malfunctioned during the 30 day returns period. (The customer should install and operate the item properly per the product manual instruction.)

IMPORTANT

For items that arrive damaged or are defective, the customer MUST provide videos or photos to support the claim that the item arrived damaged or is malfunctioning. If a customer refuses to or fails to provide videos or photos of a claimed malfunctioning/damaged item, this return will be treated as “buyer’s remorse” and the customer is solely responsible for shipping it back.

If a customer claims an item is defective/damaged, the customer must provide a proof prior to return, with no exceptions.

If the return request for a damaged/defective item can be fixed with simple parts and support, we can provide the option of free replacement part(s) and advice on how to repair your item if the customer finds that to be the easier solution so you don’t have to ship a large bulky item back.

Once we have received the approved returned item, we will review its condition. If the item is found to be defective, we will issue a refund within 3 workdays.

When the Customer Pays For Return Shipping

In the case of a return due to customer error, return shipping is the customer’s responsibility and shipping charges are paid by the customer. Fees vary by region.

JMBatteries will provide the pre-paid return shipping labels to the customer and the shipping cost for returning the products will be deducted from the refund.

It is important to note that any order offered with special shipping charges is subject to a deduction of our actual outbound shipping costs.

After the 30day returns period, customers may use the JMBatteries Warranty Policy for repairs if the item is faulty or malfunctioning. Please refer to the JMBatteries Warranty Policy for details.

Return Address

As we have warehouses in different places to receive the return products, please contact JMBatteries customer service by email (sales01@JMBatteries.com) to obtain the return address.

Refund Policy

The customer can return or refund a product for up to 30 days from the date received it. Please keep the receipt or proof of purchase.

We will notify you once we’ve received and inspected your return, and let you know if the refund was approved or not. If approved, the customer will be automatically refunded on the original payment method within 3 workdays. Please remember it can take some time for the payment bank or credit card company to process and post the refund too.

Returns may be requested for a refund if one of the following conditions is met:

Within 30 days of receiving the goods, the customer finds that the product has been damaged during transportation and can provide a certificate of damage;

Within 30 days of receiving the goods, the customer finds that the product is seriously inconsistent with the description of the original product in one or more important aspects;

Within 30 days after the customer receives the goods, it is found that the product has a performance failure that is not artificially damaged.The customer should assist us in completing all the battery testing, and both parties confirm that the product does have quality problems.

Cancellation of order

JMBatteries generally sends out your orders within 1-2 business days. To cancel an order, please contact JMBatteries as soon as possible to cancel the order and the customer will get a refund within 12 hours if the products are not sent out.

But if the product for the order has been shipped, we will refund the payment within 3 workdays after the shipped product is returned.

To cancel your order, please contact us via sales01@JMBatteries.com.

More Information

For more information about our privacy practices, if you have questions, or if you would like to make a complaint, please contact us at sales01@JMBatteries.com.