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Lion Energy

Lion Energy UT™ 3500 HTR - 12V Battery with Heater, 280Ah (3584Wh) LiFePO4, 12.8V Bluetooth

SKU 50170186
$2,099.00
$2,099.00

Estimated shipping time

You can typically expect your items to arrive within 4–7 business days, depending on your location and product availability.

What is your Return Policy?

At Northgrid Supply, we want every customer to shop with confidence. If something doesn’t go as planned, we’ve made returns and refunds simple and fair. Here’s how it works:

1. Return Window

You can request a return within 30 days of receiving your order. Unfortunately, we’re unable to accept returns after that time frame.

2. Who Pays for Return Shipping?

  • If your item arrives damaged, defective, or incorrect, we’ll cover the return shipping cost.
  • If you’re returning an item because you changed your mind, you’ll be responsible for return shipping fees.

3. Damaged or Defective Items

Received something broken or not working properly? Contact us within 30 days. We’ll provide a prepaid return label and once the item is returned and inspected, we’ll issue either a full refund or a replacement—including any original shipping costs.

4. Changed Your Mind?

If you no longer want the item, you can return it within 30 days—as long as it's unused, in its original packaging, and in resellable condition. You’ll need to handle the return shipping, and once we receive and inspect it, we’ll refund the product cost (excluding shipping).

5. Refund Processing

Once we receive and approve your return, we’ll send a confirmation email and issue a refund to your original payment method within 7 business days. Please allow additional time for banks or credit card companies to process and reflect the refund.

If it’s been over 10 business days since your refund was approved and you still don’t see it, contact us at support@northgridsupply.com and we’ll look into it immediately.

6. Restocking Fees

In some cases, a restocking fee may apply depending on the item and return reason. If applicable, we’ll clearly communicate this during your return request process.

Product Description

Lion Energy UT™ 3500 HTR – 12V Heated LiFePO4 Battery, 280Ah (3584Wh) with Bluetooth

The Lion Energy UT™ 3500 HTR is a high-capacity, internally heated lithium battery built to power off-grid systems, mobile setups, and backup energy solutions. With a robust 280Ah capacity, integrated Bluetooth monitoring, and an automatic internal heating feature, it performs reliably even in cold-weather environments. Delivering the equivalent power of nearly three standard 105Ah batteries in one compact unit, it’s ideal for solar storage banks, RVs, cabins, and industrial applications. Utilizing safe and durable LiFePO4 chemistry, this battery offers strong output and minimal upkeep over many years of use.

Key Features of the Lion Energy UT™ 3500 HTR – 12V Heated Battery

High 280Ah Capacity

Holds up to 3584Wh of energy—nearly triple the storage of a single UT 1300 battery.

Built-In Heating System

An automatic internal heater keeps the battery functional and ready to charge in low temperatures without the need for external warming devices.

Bluetooth Connectivity

Monitor battery status, performance, and usage directly through the Lion Energy mobile app.

Durable LiFePO4 Technology

Provides more than 3,500 cycles at 80% depth of discharge, offering a safe, stable, and maintenance-free power source.

Space-Saving, High-Density Design

Consolidates the output of multiple batteries into one compact package—perfect for RV, marine, and solar configurations.

Lower Cost per Amp-Hour

Delivers more energy capacity at a lower cost than combining several smaller lithium batteries.

Ideal Applications

  • Off-grid solar systems – Power cabins or large standalone energy setups with dependable storage

  • RVs and campers – Run appliances, A/C, and electronics for longer durations

  • Backup power – Maintain critical energy supply during outages

  • Marine applications – A rugged deep-cycle alternative suitable for marine conditions

  • Cold climates – Great for snowy environments that demand battery heating

  • Industrial and mobile worksites – Supports high-demand tools and equipment

What’s Included

  • 1 × Lion Energy UT™ 3500 HTR 12V LiFePO4 Battery

  • User Manual

Specifications

Category Details
Weight 72.31 lbs
Dimensions 13.85" × 7.64" × 7.64"
Capacity 280Ah
Max Continuous Discharge 150A
Max Peak Discharge 280A (50 sec)
Charge Retention 1+ year
Post Material Stainless Steel
Warranty Lifetime

FAQ

Can this battery operate in freezing temperatures?
Yes. Its built-in heating element allows safe charging and operation in cold weather.

Is it compatible with solar charge controllers and inverters?
Yes. The UT 3500 HTR works with most 12V components that support LiFePO4 batteries.

Does it require maintenance?
No. It’s a sealed, maintenance-free lithium battery with an extended cycle life.

How do I connect it to the app?
Download the Lion Energy app, turn on Bluetooth, and pair the battery to view real-time data.

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