PRODUCT DESCRIPTION

51.2V 800Ah 40kWh LiFePO4 Battery

The JM-JS-51.2V800Ah is a 51.2V 800Ah LiFePO4 battery with 40kWh of energy capacity, designed for home energy storage, solar power storage and backup power applications. With 80% depth of discharge (DoD), an 8000-cycle design and a smart BMS, the battery is built for long-term energy storage use.

For solar installers, distributors and system integrators, this large-capacity LiFePO4 battery provides a practical energy storage option for residential projects that require substantial energy storage capacity and reliable backup power.

High-Capacity 40kWh Energy Storage

With a rated capacity of 40kWh, the battery is designed for residential energy storage applications where a larger energy reserve is required.

The 51.2V 800Ah configuration provides a substantial storage capacity for solar energy systems and backup power applications. This makes it suitable for projects where installers need to consider both daily energy storage and backup requirements.

80% DoD for Usable Energy

The battery supports 80% depth of discharge (DoD).

For an energy storage system, DoD indicates how much of the battery's stored energy can be used during a discharge cycle. An 80% DoD provides a defined usable portion of the battery capacity while supporting the intended operating characteristics of the system.

For installers and system integrators, DoD is an important specification to consider when sizing a battery system according to the customer's daily energy consumption and backup requirements.

8000 Cycles for Long-Term Energy Storage

The JM-JS-51.2V800Ah is specified for up to 8000 cycles.

Cycle life is an important consideration when selecting a battery for a long-term solar energy storage project. A higher specified cycle count can be particularly relevant for systems that are regularly charged and discharged as part of their normal operation.

Combined with the 40kWh capacity, the 8000-cycle specification makes this battery suitable for projects where long-term energy storage operation is an important consideration.

Smart BMS for Battery Management

The battery features a smart Battery Management System (BMS).

The BMS is an important part of a lithium battery system because it manages battery operating conditions and supports the management of the battery during charging and discharging.

For solar installers and system integrators, battery management is an important consideration when integrating a LiFePO4 battery into a residential energy storage system.

Designed for Home Solar Energy Storage

The 51.2V 800Ah 40kWh LiFePO4 battery can be used in applications including:

• Home energy storage
• Solar energy storage
• Solar battery systems
• Backup power
• Residential energy storage

For homes using solar power, the battery can serve as an energy storage component for storing electricity generated by the solar system and providing stored energy when required.

For backup applications, the 40kWh capacity provides a substantial energy storage reserve for residential systems. Actual backup duration will depend on the connected loads, inverter configuration and system operating conditions.

Built for B2B Solar Projects

This battery is designed for customers involved in the deployment of residential energy storage systems, including solar installers, solar distributors and system integrators.

For solar installers, the 51.2V 800Ah configuration provides a defined battery capacity for project design and system sizing.

For distributors, the product combines a clear product specification with common solar energy storage applications.

For system integrators, the 51.2V 800Ah configuration, 40kWh capacity, 80% DoD, 8000-cycle specification and smart BMS provide key technical information for evaluating the battery for residential energy storage projects.

APPLICATIONS

Home Energy Storage

Designed for residential energy storage systems requiring a large battery capacity for daily energy storage.

Solar Energy Storage

Suitable for storing energy generated by residential solar systems for later use.

Backup Power

The 40kWh capacity can provide stored energy for residential backup applications, with actual backup time depending on system loads and configuration.

Residential Solar Battery

The battery can be integrated into residential solar energy storage projects where a high-capacity LiFePO4 battery is required.

TECHNICAL SPECIFICATIONS

Company Profile

FAQ

What is the capacity of the JM-JS-51.2V800Ah battery?

The battery has a 51.2V 800Ah configuration and a rated energy capacity of 40kWh.

What is the DoD of this LiFePO4 battery?

The specified depth of discharge is 80% DoD.

How many cycles does the battery support?

The battery is specified for 8000 cycles.

Is this battery suitable for home energy storage?

Yes. The battery is designed for applications including home energy storage, solar energy storage and backup power.

Can this battery be used with a solar energy system?

The battery is designed for solar energy storage applications. The specific system configuration should be evaluated based on the inverter, loads and other system components.

Who is this battery designed for?

The product is particularly relevant to solar installers, solar distributors and system integrators working on residential energy storage projects.

What is the battery model?

The product model is JM-JS-51.2V800Ah.

How long can 40kWh of battery storage provide backup power?

Backup duration depends on the connected load and system configuration. For example, a 5kW continuous load would theoretically consume 40kWh in about 8 hours before considering usable DoD and system losses. Actual operating time will vary according to the system.

B2B CTA

CTA 1 — Solar Installers

Planning a residential solar storage project? Contact JMBatteries to discuss the 51.2V 800Ah battery configuration for your application.

CTA 2 — Distributors

Looking for a large-capacity LiFePO4 battery for your solar energy storage portfolio? Contact JMBatteries for product details.

CTA 3 — System Integrators

Need a 40kWh battery solution for a residential energy storage project? Send us your system requirements and discuss the appropriate battery configuration with JMBatteries.

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.

Freight charges and taxes vary by country. In some countries, additional freight charges or taxes are required（For example: Switzerland, Norway, Mexico, Brazil, India, etc.）

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,– 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
CN	By Sea+Express (Fedex/DHL/UPS, Tax Free)	3~7 working days	30 ~60 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)

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.