Description
Heated 12V 300Ah Lithium Battery — CLI300-12LT
Heated 12V 300Ah lithium battery engineered for year-round operation in sub-zero environments — the Canbat CLI300-12LT solves one of the most critical limitations of standard LiFePO4 batteries: the inability to safely charge below freezing. Standard lithium batteries stop accepting a charge at 0°C (32°F) to prevent permanent cell damage — a critical limitation for off-grid cabins, 4-season RVs, marine installations, and remote industrial sites that need to keep charging through Canadian winters. The CLI300-12LT solves this with an integrated, charge-activated heating system that warms the cells automatically before current is accepted, with no external heating pads, insulated enclosures, or manual intervention required.
With 3,840Wh of usable energy, prismatic LiFePO4 cells, 3,000–5,000 cycles at 100% depth of discharge, and full series and parallel expandability — supporting 12V, 24V, 36V, and 48V system configurations — the CLI300-12LT is a flagship energy storage solution for serious winter-ready power systems.
It ships free across Canada and the USA with same-day dispatch, carries a 10-year warranty, and is built with UL 1642 certified cells. For Canada and USA orders, there are no import duties or cross-border complications.
How the Built-In Heating System Works
Charging a lithium battery below freezing causes lithium plating on the anode — a form of permanent cell damage that reduces capacity and accelerates degradation. Standard LiFePO4 batteries protect against this by simply refusing to charge below 0°C, leaving the battery useless on cold mornings when solar panels are producing power, a shore power connection is available, or a generator is running.
The CLI300-12LT’s heating system is fully automatic and charge-activated. Critically, it draws power from the incoming charging source — not from the battery’s stored energy — so the heating process does not reduce usable capacity. The system operates in four stages:
| Stage | Process | What Happens |
|---|---|---|
| 1 | Thermal detection | Charger connects. BMS reads internal cell temperature. If below 0°C, incoming current is redirected to the heating elements instead of the cells. |
| 2 | Internal warming | Heating elements warm the cell stack gradually. The process is powered entirely by the charger — stored battery energy is not consumed. |
| 3 | Charge initiation | Once internal sensors confirm safe cell temperature, the heater disables automatically and full charging current is delivered to the cells. |
| 4 | Continuous monitoring | If temperature drops again during the charge cycle, the heater reactivates automatically. The system manages itself without user intervention. |
This proprietary process enables safe charging down to -20°C (-4°F) — covering the majority of Canadian winter conditions and providing reliable operation through temperatures that would prevent a standard lithium battery from accepting any charge at all. Discharge operation continues normally in cold temperatures regardless of the heating system status.
Why Cold-Weather Charging Matters for Canadian Systems
In Canada, the gap between standard and heated lithium batteries becomes critical the moment temperatures drop below freezing — which happens across most of the country for four to six months of the year. The problem is not just that a standard lithium battery won’t charge in the cold. It’s that the restriction arrives at exactly the wrong moment: when solar panels are producing power on a clear winter day, when shore power is connected at a winter marina, or when a cabin generator is running after a cold night.
Every missed charge cycle represents lost energy, reduced system autonomy, and a system that isn’t performing as designed. For remote properties, liveaboards, and industrial installations where site visits are infrequent and expensive, a standard lithium battery that rejects charge for months at a time is not a functional energy storage solution — it becomes a limiting factor in system performance.
The CLI300-12LT is built specifically for this environment. It captures every available charging opportunity regardless of ambient temperature, maintains system autonomy through the winter months, and eliminates the compromises that come with using a standard lithium battery in a genuinely cold-weather application.
Applications
Off-Grid Solar & Cabin Systems
Solar panels produce power on clear winter days even when the cabin is unoccupied and unheated. Standard lithium batteries reject this charge below freezing, leaving the energy bank depleted and the system offline when owners return. The CLI300-12LT keeps the energy bank topped up year-round — critical for remote properties in Northern Ontario, BC, the Prairies, and the territories where winters are long and site visits are infrequent.
4-Season RVing & Van Life
Mount the power system in external storage bays or uninsulated compartments without seasonal limitations. Stable high-current discharge runs heavy 12V appliances — microwaves, coffee makers, induction cooktops, diesel heaters — without the voltage sag typical of lead-acid alternatives. Shore power charges the battery overnight even in a cold campground or storage facility.
Marine & Sailboat House Banks
Sealed and vibration-resistant, with side-mounting capability for tight engine rooms or under-seat compartments. Maintenance-free operation handles the high humidity and fluctuating temperatures of marine environments. Suits seasonal vessels that sit unused for months at a time — shore power keeps the house bank charged through winter without manual intervention.
Emergency Backup & Home Storage
Paired with a quality inverter, a single CLI300-12LT can run essential appliances, medical devices, and communications during extended grid outages — and continues to charge from solar even when an unheated garage or outbuilding drops well below freezing. A critical advantage in regions where winter storms cause multi-day power outages.
Industrial & Remote Telecommunications
For weather stations, telecom towers, pipeline monitoring sites, and oil & gas installations, the combination of 3,000–5,000 cycle life and sub-zero charging capability keeps critical equipment online through the harshest Canadian winters and dramatically reduces expensive site visits and battery replacements.
Heated 12V 300Ah Lithium Battery for Off-Grid & RV Systems
The CLI300-12LT is the cold weather lithium battery of choice for Canadians building serious off-grid and mobile power systems. At 300Ah and 3,840Wh, it provides enough capacity to run a full off-grid cabin, a large RV, or a marine house bank through multiple days without recharging — and unlike any standard 300Ah lithium battery, it continues accepting charge from solar panels, shore power, or a generator even when ambient temperatures drop well below freezing.
For system builders sourcing a heated lithium battery in Canada, the CLI300-12LT ships free with no cross-border duties, is backed by a Canadian technical team, and carries a 10-year warranty. It is compatible with all major inverter/charger brands and solar charge controllers that support a LiFePO4 charging profile — making it a direct, field-proven upgrade from lead-acid in virtually any 12V deep cycle application.
Runtime & Performance
The CLI300-12LT delivers 3,840Wh of usable energy at 12V nominal. Understanding what this means in practice helps size your system accurately:
| Application / Load | Average Draw | Estimated Runtime |
|---|---|---|
| LED lighting & low-draw electronics | 5–10A | 30–60 hours |
| 12V fridge + lighting | ~15–20A | ~15–20 hours |
| Inverter — 500W load (microwave, coffee maker) | ~42A | ~7 hours |
| Inverter — 1,000W load | ~83A | ~3.5 hours |
| Inverter — 2,000W load | ~167A | ~1.8 hours |
| Marine house bank (nav, fishfinder, VHF, lights) | ~10–15A | 20–30 hours |
| Diesel heater + essential cabin loads | ~8–12A | 25–37 hours |
Runtime figures are based on 100% usable depth of discharge. Unlike lead-acid batteries — which should not be regularly discharged below 50% to avoid accelerated degradation — the CLI300-12LT delivers its full 300Ah on every cycle. An equivalent lead-acid bank would require 600Ah of nominal capacity to match the CLI300-12LT’s usable output. A single CLI300-12LT replaces a large multi-battery lead-acid bank while delivering more usable energy, longer runtime, and stable voltage under load.
Series & Parallel Expandability
The CLI300-12LT supports both series and parallel connections, giving system designers full flexibility to build the exact voltage and capacity their application requires — from a single 12V 300Ah unit up to a 48V 1,200Ah bank.
| Configuration | Units | System Voltage | Total Capacity |
|---|---|---|---|
| Single unit | 1 | 12V | 300Ah / 3,840Wh |
| Parallel x2 | 2 | 12V | 600Ah / 7,680Wh |
| Parallel x3 | 3 | 12V | 900Ah / 11,520Wh |
| Parallel x4 (max) | 4 | 12V | 1,200Ah / 15,360Wh |
| Series x2 | 2 | 24V | 300Ah / 7,680Wh |
| Series x3 | 3 | 36V | 300Ah / 11,520Wh |
| Series x4 (max) | 4 | 48V | 300Ah / 15,360Wh |
For large off-grid solar systems, RV builds, and marine installations requiring 24V or 48V operation, the CLI300-12LT provides a scalable heated lithium foundation that eliminates the cold-weather charging limitation across the entire bank.
Standard vs. Heated 300Ah Lithium Battery
A heated lithium battery ensures your system continues charging reliably through winter conditions where standard lithium batteries stop accepting charge. If your battery will live in a heated, temperature-controlled space, a standard 12V 300Ah lithium battery will perform identically and cost less. Choose the CLI300-12LT when the battery will be exposed to freezing temperatures — outdoor installations, unheated cabins, RVs in winter use, marine applications, or industrial sites.
| CLI300-12LT (Heated) | CLI300-12 (Standard) | |
|---|---|---|
| Cold-weather charging | Down to -20°C (-4°F) | 0°C (32°F) minimum |
| Discharge in cold | Normal operation | Normal operation |
| Integrated heater | Yes — automatic, charge-activated | No |
| Best for | Outdoor, unheated, winter installations | Heated, controlled environments |
| Capacity & cycle life | Identical — 300Ah / 3,000–5,000 cycles | Identical — 300Ah / 3,000–5,000 cycles |
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | CLI300-12LT |
| Chemistry | Lithium Iron Phosphate (LiFePO4) — Prismatic cells |
| Nominal Voltage | 12V (12.8V nominal) |
| Capacity | 300Ah |
| Energy | 3,840Wh |
| Cycle Life | 3,000–5,000 cycles at 100% DoD |
| Charging Temperature | -20 to 45C (-4F to 113F) — via integrated heater |
| Discharge Temperature | -20 to 60C (-4F to 140F) |
| Built-In Heating | Yes — automatic, charge-activated, powered by charger source |
| Weight | 76 lbs (34.5 kg) |
| Dimensions (L x W x H) | 520 × 269 × 222 mm / 20.47 × 10.59 × 8.74 in |
| Terminal Type | M8 — bolts included |
| BCI Group Size | 8D |
| Mounting | Upright or on side |
| Parallel Expansion | Up to 4 units (1,200Ah / 12V maximum) |
| Series Expansion | Up to 4 units (24V, 36V, or 48V systems) |
| BMS Protection | Over-charge, over-discharge, short circuit, over-current, temperature extremes, cell balancing, heating logic |
| Bluetooth Monitoring | Optional add-on (Canbat BT app — free for iOS and Android) |
| Storage | Store at 80–100% SoC in a cool, dry environment |
| Certification | UL 1642 certified cells |
| Warranty | 10 years |
| Shipping | Free across Canada and USA — same-day dispatch |
Battery Management System and Bluetooth Monitoring
The CLI300-12LT’s integrated BMS manages both the heating logic and full cell-level protection simultaneously. There is no external battery management required — the system operates automatically in all conditions.
- Heating logic — automatically activates and deactivates the cell heater based on internal temperature readings
- Over-discharge protection — prevents cell damage from excessive depth of discharge
- Over-charge protection — disconnects at the correct voltage ceiling
- Short circuit and over-current protection — responds within milliseconds
- High-temperature cutoff — protects cells during charging in hot environments
- Cell balancing — maintains consistency across the prismatic cell groups over thousands of cycles
The optional Bluetooth add-on connects the battery to the free Canbat BT app, available for iOS and Android. In addition to the standard state of charge, voltage, and current readings, the app displays real-time cell temperature and heating system status — particularly useful for remote installations where knowing whether the heater has activated helps confirm the system is operating as expected in cold conditions.
System Compatibility and Installation
The CLI300-12LT is compatible with any inverter/charger, solar charge controller, or AC charger that supports a LiFePO4 charging profile. When replacing lead-acid batteries, verify that the charging system’s voltage settings are configured for lithium — incorrect lead-acid charge profiles will undercharge the battery or stress the cells over time.
For alternator charging in vehicles or boats, a DC-DC charger is recommended to deliver proper LiFePO4 charging parameters and protect the alternator from the battery’s high charge acceptance rate. M8 terminals with bolts are included. The battery can be mounted upright or on its side, making it suitable for tight installations in RV bays, engine rooms, and equipment enclosures.
For system sizing assistance, inverter compatibility questions, or help configuring a multi-battery bank, Canbat’s Canadian technical team is available by phone, email, and live chat.
Canadian Supply, Support and Warranty
Canbat is a Canadian battery company. The CLI300-12LT ships free to any address in Canada and the USA with same-day dispatch on in-stock orders. Canadian and US buyers pay no import duties and face no cross-border complications on their orders.
The CLI300-12LT is backed by a 10-year warranty and supported by a Canadian technical team available by phone, email, and live chat. Warranty claims can be submitted directly with Canbat — with no overseas support queues and no runaround.
Harold S. –
This 300Ah lithium battery works perfectly in my cabin during the hot summers and the cold winters. I love how 300Ah of power is available in just one battery instead of having to buy multiple batteries and connect them in parallel. Great battery and fantastic customer service. Kudos to Canbat and to Emily for her help!
Dave N. –
We bought two of these 300Ah LiFePO4 batteries and connected them in series for our 24V solar system. The batteries work great and they are very light. The install was a piece of cake and I didn’t need to break my back this time.
Paul K. –
Great and compact 12V battery which outperformed any other lithium I’ve tested. I have purchased a number of these batteries for my clients and they have never let me down. Excellent lithium batteries at very competitive prices.
Sim P. –
Canbat has the fairest price on the market for 300AH lithium battery. The voltage of this type of battery is very constant, keeping all my electronics on for longer. The battery is long lasting and works great in my RV application.
Monica G. –
The Canbat lithium 12V 300ah battery works great with my trolling motor. The installation was straightforward as if it’s a lead-acid battery but much lighter ofcourse.
Ansis P. –
I bought one of the 300AH LiFePO4 battery and it offers tremendous advantages for powering boats and kayak motors.
Marley L. –
Shipping was very fast. Bought the 12V 300AH COLD WEATHER LITHIUM BATTERY at the presale price which was great. The person who was on the phone with me was also very helpful.
Emily D. –
I recently changed to a lithium battery from a lead-acid battery. I bought the LiFePO4 battery to replace the bank in my sailboat. So far the performance is incredible!
Tony N. –
I bought CLI 100ah a while back from Canbat. Now I am upgrading to CLI 300ah for my sailboat. These lithium batteries have a built-in battery management system to ensure a longer life span!
Debra C. –
Great performance from this 300Ah lithium battery. The price is definitely worth the investment. Thank you for shipping so fast!!
Nelson G. –
I am a returning customer. Canbat carries some great lithium battery products! They have amazing customer service and also offer free and quick shipping! Very excited to receive my CLI300-12LT Battery for my boat
Logan P. –
My research led me to Canbat Batteries. I am impressed with the quality of the product on my camper van and the 10-year warranty. I received my 300AH LT lithium battery within 4 days. The shipping was quick and the packaged was well secured with manual and charging instructions.
Joseph N. –
Cette batterie a pleinement transformé mes aventures en camping-car. Elle assure une alimentation continue et fiable pour mes appareils électroniques et mon chauffage intérieur, même lors de nuits glaciales. L’autonomie est tout simplement incroyable. Sa durabilité et sa performance dans des environnements difficiles sont remarquables.
Patrick S. –
Après avoir examiné plusieurs marques de batteries, je suis très content de la batterie cold wheather de 300 Ah que j’ai achetée pour mon camping-car de classe B. Contrairement à d’autres batteries limitées à 100 ampères-heures, le taux de décharge de 200 Ah me permet d’utiliser ma plaque de cuisson à induction de 1800 watts et d’autres appareils électriques sans problème. Utilisant le camping-car toute l’année, le système de gestion de la batterie et le chauffage intégré sont idéaux pour une utilisation par temps froid. L’application Bluetooth est aussi très utile pour surveiller l’état de charge et la consommation électrique. Je recommande vivement cette batterie à tous les propriétaires de camping-car.
Chloé P. –
Après des recherches approfondies, j’ai décidé d’opter la battery 300Ah avec chauffage intégré. J’aurais pu commander une batterie moins chère sur Amazon, mais les batteries de Canbat riche en fonctionnalités (Bluetooth, chauffage, BMS compatible) on rendu le coût additionnel bien justifié. En plus, le support technique excellent et le personnel de vente très utile (oui, j’ai parlé à de vraies personnes capables de répondre à mes questions) ont facilité ma décision. Quant à la performance de la batterie, elle est conforme à ce qui est annoncé. Tout le processus n’a pris que quelques heures (le plus difficile étant de manipuler les AGM très lourds), et l’intégration avec mon chargeur/convertisseur et le contrôleur solaire existants a été assez simple… presque du plug and play. En résumé, la batterie fonctionne bien, aucun problème d’utilisation ni de charge. Si vous hésitez, appelez-les, vous ne le regretterez pas.
Catherine V. –
Jusqu’à présent, tout va bien et les performances sont excellentes depuis que nous avons remplacé notre batterie AGM il y a 3-4 semaines.
James B. –
The battery is a little expensive, but it’s 100% worth it. I installed three of these 300Ah heated LiFePO4 batteries in my off-grid cabin and I’m living as if I’m at home. Everything is turned on all the time and I never worry about running out of power. The customer service was also suburb. I spoke to Andrew and he helped me size my system and helped me select the right lithium batteries for my cabin. Overall, I am extremely happy, just hope the price was a little more competitive!