SOK 206Ah | 12V - Heated LiFePO4 Lithium Battery - Marine Version (Plastic Case)

SOK 206Ah | 12V - Heated LiFePO4 Lithium Battery - Marine Version (Plastic Case)
SOK 206Ah | 12V - Heated LiFePO4 Lithium Battery - Marine Version (Plastic Case)

SOK 206Ah | 12V - Heated LiFePO4 Lithium Battery - Marine Version (Plastic Case)

Rated 5.0 out of 5
Based on 9 reviews
  • New, updated V8 BMS!
  • Built-in heating pad so you can charge in freezing temperatures
  • 7 year warranty - 4000-8000 cycle life
  • Detachable cover, user serviceable BMS and cells
Regular price $1,050.00

  • In stock, ready to ship
  • Inventory on the way
  • Free Shipping in Canada 🇨🇦
  • No Shipping to USA




When deciding on what type of battery you need, we can assure you that a SOK is the best lithium battery Canada has to offer. Lighter and longer-lasting than older counterparts, these are the best bang for your buck whether you are trying to power your RV, van, boat, cabin, or off-grid living. 

Easy to plug in and forget, SOK batteries keep you worry-free with advanced management systems that protect them from all elements and issues. 

The marine versions of these awesome lithium batteries are useful in many applications too, not just for those with boats! Made to withstand the weather, consider these as ideal for locales often exposed to the elements, like a winter ski cabin, houseboat, or maybe even an ice fishing camp? The applications are endless, and if you aren’t a full-time van lifer, why not get dual use out of your equipment?

Key Features & Benefits:

  • Bluetooth - Check the health of your battery, anywhere, at any time, right from your smart phone.
  • Battery Management System - Also referred to as the brain of the battery, the built-in BMS protects your cells from excessive currents and short circuits.
  • Temperature Control - The built-in low-temperature sensor protects the battery in extreme temperatures. 
  • Over Charging and Discharging Protection - Another awesome built-in BMS feature.
  • Built-In Heating Pad - Feel secure knowing you can charge and discharge your batteries down to -20ºC (-4ºF) without damaging your cells
  • Long-Lasting - A ridiculous 4000-8000 cycles.
  • Only 44 lbs Keeping your loaded weight to a minimum.
  • Waterproof - Made for marine environments - Rated at IP65
  • Serviceable Case - Just as easy to work on as they are to use.
  • 7-Year Warranty - Because these batteries are expected to last!

In order to save battery power the bluetooth turns off after 6 hours of inactivity. As soon as charge or discharge is detected the bluetooth will turn back on.

Dimensions & Specifications:

Size: 13.31" x 9.06" x 10.85" (L x W x H)
Weight: 44 lbs
Terminal Type: M8, 5/16 lugs
Weather Rating: IP65

Charge Information:

Recommended Charge Current: 40A
Maximum Charge Current: 50A
Recommended Charge Voltage: 14.6V

Discharge Information:

Maximum Continuous Discharge Current: 100A
Peak Discharge Current: 200A (7.5 s ±2.5 s)
Recommended Low Voltage Disconnect: 10.4V

Temperature Information:

Charge Temperature:-20 to 45ºC (-4 to 113ºF)
Discharge Temperature: -20 to 60ºC (-4 to 140ºF)
Storage Temperature: -5 to 35ºC (23 to 95ºF)

Previously you were not able to connect heated batteries in series.

Now with the updated V8 BMS they can be connected in series.

However with series connection you need a battery voltage balance. This one from Victron is recommended.

More Information:

SOK Frequently Asked Questions Sheet

For more information, watch this unbiased review with over 195k views


Yes. The BMS inside the battery will prevent charging below 0°C in order to protect the cells. It will allow the battery to discharge in freezing temperatures. If you need to charge the battery in freezing temperatures then we recommend the heated versions.

The lowest safe storage temperature is -6°C. For any temperatures below this, you should bring them inside or add a heating pad of some sort. If a heating pad runs out of power and the battery falls below -6°C, damage may occur.

No they are likely too big to fit into standard boxes. Many people put them in tool boxes or any enclosed unit that protects them from the elements. The metal case units are not fully waterproof while the plastic case (marine version) are 100% waterproof.

Unfortunately this is not an easy question. If you're charger has an equalize charge voltage that is greater than 14.6 volts then it CANNOT be used. Your total charge amperage should not exceed 50 amps per battery. If you have multiple batteries in parallel then you can combine the max charge amperage. Optimal absorption voltage is 14.4-14.6V and float voltage of 13.6-13.8V.

Yes. SOK batteries can be installed in any configuration except for upside-down.

The batteries have a 7 year manufacturer warranty. If you are having issues with the battery we are here to help. In the rare case of a warranty claim we will ship you a new battery and deal with the claim with SOK. The 7-year warranty covers anything that fails or doesn't stand up to the manufacturers' specs, and includes both the cells inside and the BMS.

Items may be returned within 14 days of delivery. Must be unused, and in original packaging.

You are responsible for return shipping. Water tanks and batteries are subject to an $80 restocking fee.

Please ship your return to:
Curious Campervans
238 Hastings Ave
Penticton, BC, Canada, V2A 2V6

Email us at when you are submitting a return, so we can watch out for your item. We will issue a refund, less restocking fee, once we receive the item back in resellable condition.

What people think about this product ?

average rating 5.0 out of 5
Based on 9 reviews
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Customer photos and videos
Review posted
Reviewed by Jay R.
Verified Buyer
Rated 5 out of 5

Lead Acid Upgrade

Good product upgrades for my adventure trailer - thus far the batteries have performed as advertised. I ordered metal case, but was told not available on my arrival, elected to use plastic but not ideal for my application. The lip protrusions on each unit to allow for screwing on the cover do not allow for snug spaces and tight install. I worry that the protrusions may get damaged or damage adjoining equipment in my harsh moving environment.

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Reviewed by Kim
Verified Buyer
Rated 5 out of 5

Very happy with purchase SOK 206Ah heated marine version

I fully charged my battery using recommended Victron IP67 12/25 charger. I then did a constant current discharge test (10 amps). Was very pleased to see capacity was 211 Ah. Cell balance is within .006 volts. This battery will become my house battery on our 26 foot power boat.

I recommend this product
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Reviewed by Robbie B.
Verified Buyer
Rated 5 out of 5

206 ah

They are the best

I recommend this product
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