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

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

Name: Lion Energy UT™ 3500 HTR - 12V Battery with Heater, 280Ah (3584Wh) LiFePO4, 12.8V Bluetooth
Brand: Lion Energy
SKU: 50170186
Price: 1499.0 USD
Availability: InStock

BY: Lion Energy

SKU: 50170186

| Availability: In stock

$1,699.00

$1,499.00

You Save: $200.00

Found A Better Price?

Share it with us now and we will beat it. Get the best deal online, guaranteed!

Live Chat With an Expert

Estimated Delivery Between

and .

Order within to get it by the earliest date.

Order within

to get it by the earliest date.

Authorized Lion Energy Dealer

Free & Fast Shipping From US Warehouses

Easy 30-Day Returns & Price Beat Guarantee

Lifetime Expert Support

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

The Lion Energy UT™ 3500 HTR is a high-capacity, heated lithium battery designed to power your off-grid, mobile, and backup energy systems with ease. With an impressive 280Ah capacity, integrated Bluetooth monitoring, and internal heater, it offers optimal performance even in cold climates. It packs the energy of nearly three standard 105Ah batteries into a compact form—ideal for solar banks, RVs, cabins, or industrial use. Built with safe and long-lasting LiFePO4 technology, this battery delivers high power with low maintenance for years to come.

Lion Energy UT™ 3500 HTR - 12V Battery with Heater Features

Massive 280Ah Capacity

Store up to 3584Wh of power—equivalent to nearly three UT 1300 batteries—in a single footprint.

Integrated Internal Heater

Built-in automatic heating system keeps the battery performing in cold climates without external warmers.

Bluetooth Monitoring

Track battery health, charge status, and usage via the Lion Energy mobile app in real time.

Long-Lasting LiFePO4 Chemistry

Enjoy over 3,500 life cycles at 80% depth of discharge—safe, stable, and maintenance-free.

Compact Footprint, Higher Density

Replaces multiple batteries in one space-saving design—ideal for RV, solar, and marine setups.

24% Lower Cost per Amp-Hour

Get more capacity at a lower overall cost compared to using multiple smaller lithium batteries.

Lion Energy UT™ 3500 HTR - 12V Battery with Heater Applications

Off-grid solar banks – Power entire cabins or large off-grid systems with reliable, long-lasting storage
RV and camper power systems – Extend run time for appliances, A/C, and electronics
Backup energy storage – Maintain critical power during blackouts and emergency scenarios
Marine and boat battery replacement – Deep cycle battery alternative that performs in harsh conditions
Cold climate installations – Perfect for snow-prone areas where battery warmth is crucial
Industrial or mobile job sites – Support high-draw tools and equipment on the go

What's Included

Everything you need is included with your product.

1 x Lion Energy UT™ 3500 HTR 12V LiFePO4 Battery

User Manual

Lion Energy UT™ 3500 HTR - 12V Battery with Heater Specifications

Category	Specifications
Weight	72.31 lbs.
Dimensions	13.85" x 7.64" x 7.64" (L x W x H)
Amp Hours (Ah)	280
Max continuous discharge	150A
Max peak discharge	280A (50 sec)
Charge retention	1+ years
Post material	Stainless steel
Warranty	Lifetime

Frequently-Asked Questions

Can I use this battery in freezing conditions?

Yes. The built-in internal heater allows the battery to operate and charge safely in cold environments.

Is it compatible with solar charge controllers and inverters?

Absolutely. The UT 3500 HTR works with most 12V system components designed for LiFePO4 batteries.

Does it require any maintenance?

No. This is a sealed, maintenance-free battery with long cycle life and smart management.

How do I connect it with the app?

Simply download the Lion Energy app, enable Bluetooth, and pair your battery for instant status updates and insights.

Manual

Lion Energy UT™ 3500 HTR Manual

Shipping & Easy Returns

Shipping is FAST & FREE across the US. Read our full Shipping Policy here.

We offer market leading Easy 30 Day Returns. Read more about our Returns Policy here.

Why Buy From Us

We get it. You've got a lot of choices when it comes to online retailers. Here's why we think you should shop with us at Off-Grid Source.

Free Shipping: Absolutely no hidden charges, ever.
Guaranteed Best Prices: If you find a lower price elsewhere, we'll match it.
30-Day Easy Returns: Not Happy with your product? Return it, no questions asked.
Great Customer Service: It's rare to get a real person these days, but with us, you always will. Have questions? Call us at +1 (877)-556-3347.

FAST & FREE SHIPPING

From US-Based Warehouse

30-DAYS EASY RETURNS

Yes, Really.

GUARANTEED BEST PRICES

Find a Better Price? We’ll Match It.

GREAT CUSTOMER SERVICE

Call Us: (+1) 877-556-3347

Our Customers Tell It Better Than We Do

Excellent 4.9/5

Trusted By 10,000+ Customers. See All Reviews.

They Stood By Me

I was a DIY solar power wannabe... that is 'til I connected with Manny... The man's a prince! He not only knows his stuff; he walked me through all things electrical. To make sure I had all I needed... he gave me his cell phone # to text him anytime I got confused... nights and weekends included. The prices were very competitive... definitely go with Manny -- you won't go wrong!

Bruce D.

Awesome Service!

I am always hesitant to buy things at places I have never shopped... I want to give a shout out to Manny who with great patience and knowledge helped me get my orders... I felt valued as a customer and I will definitely be back in the future. I highly recommend them, they make you feel like family.

Jennene A.

Real Person, Honest Service.

I'm about to go off grid. I called Manny, he walked me through everything so I could truly understand what I needed and never tried to upsell me. He was honest and made a customer for life.

Ray B.

Easy Return

I would personally like to thank Manny... I purchased the inverter and decided I needed to return it... Manny was very understanding and went out of his way to help me return the product and not even have to pay for shipping return. He gives this company reputation, honor and quality customer service!

Roger V.

Totally Off Grid.

I have been talking with Manny the owner... He has not only helped me design a system but he's been assisting with the install and components. I am super pleased so far with the assistance.

Jeff S.

Great Product! Fast Shipping

We added 2 more batteries to our current set up. Pleased with the customer service from Off-Grid Source! Will be back!

Jason

Excellent Customer Service

Very fast response times. Very professional. I highly recommend!

Ray W.