Description
12V 300Ah Lithium Battery — CLI300-12
The Canbat CLI300-12 is a 12V 300Ah lithium battery delivering 3,840Wh of usable energy for serious off-grid solar systems, large RV electrical builds, marine house banks, and high-capacity inverter applications. Built on prismatic LiFePO4 cells in a Group 8D footprint, it combines 3,000–5,000 cycle life, 200A continuous discharge, full series and parallel expandability, and maintenance-free operation into a single high-capacity unit that replaces large, heavy AGM battery banks with a fraction of the weight and significantly more usable energy.
At 75 lbs (34.02 kg) — roughly half the weight of a comparable AGM bank — the CLI300-12 simplifies installation, reduces chassis load, and eliminates the ongoing maintenance requirements that lead-acid alternatives demand. For RV owners, off-grid builders, marine installers, and system integrators who need maximum deep-cycle capacity in a standard Group 8D format, the CLI300-12 is Canbat’s flagship standard deep-cycle lithium battery.
It ships free across Canada and the USA, 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.
3,840Wh of Usable Energy — Replacing Large AGM Banks
A single CLI300-12 delivers 3,840Wh of fully usable energy at 100% depth of discharge. To match that usable output from a conventional AGM battery bank — where depth of discharge is typically limited to 50% to protect cycle life — would require 600Ah of nominal AGM capacity. That means multiple large batteries, significantly more weight, more wiring, more maintenance, and more installation complexity.
The CLI300-12 consolidates that entire setup into a single Group 8D unit. Same familiar footprint. Substantially less weight. No maintenance. And a cycle life of 3,000–5,000 full charge/discharge cycles — far exceeding what any AGM battery can deliver at comparable depth of discharge.
For system builders replacing aging AGM banks in RVs, boats, or off-grid installations, the CLI300-12 is not a like-for-like battery swap. It is a system upgrade that delivers more usable energy, less weight, and longer service life in a single installation.
Applications
Off-Grid Solar Systems
For off-grid cabins, remote properties, and permanent off-grid homes with substantial solar arrays, the CLI300-12 provides the storage depth to sustain full household loads through multiple days of low solar production. A single unit captures and stores more usable solar energy than a large multi-battery AGM bank, in a fraction of the weight and space.
Large RV & Motorhome Systems
Fifth wheels, Class A motorhomes, and large travel trailers running residential-grade electrical systems benefit from the CLI300-12’s 3,840Wh capacity. Running induction cooktops, residential fridges, entertainment systems, and high-draw appliances through extended boondocking stays without generator dependency. The 200A continuous discharge rating supports large inverter loads without voltage sag.
Marine House Banks
For larger sailing vessels, liveaboards, and powerboats where the house bank must sustain autopilot, radar, chart plotters, refrigeration, watermakers, and full cabin electrical systems through extended passages, the CLI300-12 delivers the reserve capacity required in a sealed, maintenance-free, Group 8D format. No off-gassing. No acid spills. No terminal corrosion.
Van Builds & Overland Systems
For full-time van dwellers and serious overland builds where the electrical system runs high-draw appliances — induction cooking, compressor fridges, inverter loads — the CLI300-12 provides the energy reserve for multiple days of autonomy in a single battery. At 75 lbs, significantly lighter than equivalent AGM capacity while delivering substantially more usable energy.
Backup Power & Emergency Systems
Paired with a quality inverter, the CLI300-12 provides meaningful backup power for essential household loads, medical devices, and communications during extended grid outages. Its 3,840Wh of usable capacity supports sustained operation of critical systems well beyond what smaller battery banks can deliver.
12V 300Ah Lithium Battery for Off-Grid, RV & Marine Systems
The CLI300-12 is Canbat’s flagship standard 12V deep cycle lithium battery — a Group 8D platform delivering 3,840Wh of usable LiFePO4 energy for the widest range of high-capacity 12V applications. It is designed for buyers sourcing a high-capacity 12V 300Ah lithium battery capable of supporting large inverter loads, extended off-grid stays, and serious marine house bank applications. It is one of the most cost-effective ways to deploy serious lithium energy storage for buyers who need maximum deep-cycle capacity in a familiar footprint, without the added investment of integrated cold-weather heating.
For Canadians sourcing a 12V 300Ah lithium battery, the CLI300-12 ships free with no import duties, is backed by a Canadian technical team, and carries a 10-year warranty. Compatible with all major inverter/charger brands and solar charge controllers that support a LiFePO4 charging profile. For installations in unheated environments or cold climates where charging below 0°C is required, the CLI300-12LT offers the same capacity with an integrated heating system.
Runtime & Performance
The CLI300-12 delivers 3,840Wh of usable energy at 12V nominal — all accessible at 100% depth of discharge on every cycle with stable voltage throughout:
| 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 | ~42A | ~7 hours |
| Inverter — 1,000W load | ~83A | ~3.5 hours |
| Inverter — 2,000W load | ~167A | ~1.8 hours |
| Marine house bank (nav, radar, fridge, lights) | ~15–25A | 12–20 hours |
| Large RV overnight (fridge + appliances + lighting) | ~30–40A | ~7–10 hours |
Runtime figures are based on 100% usable depth of discharge. The CLI300-12 delivers its full 300Ah on every cycle with stable voltage under sustained loads — a critical advantage for inverter systems where voltage sag causes premature shutdowns.
Series & Parallel Expandability
The CLI300-12 supports both series and parallel connections — up to 4 units in either configuration — giving system designers full flexibility to scale voltage and capacity as the application demands.
| 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 |
Start with a single unit and expand as your system grows — the CLI300-12’s modular architecture supports the full range of 12V, 24V, 36V, and 48V system configurations without redesigning the installation.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | CLI300-12 |
| 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 |
| Max Continuous Discharge | 200A |
| Peak Discharge | 450A for 3 seconds |
| Max Charge Current | 200A (recommended 100A) |
| Charging Temperature | 0°C to 45°C (32°F to 113°F) |
| Discharge Temperature | -20°C to 60°C (-4°F to 140°F) |
| IP Rating | IP54 — splash and dust resistant |
| Weight | 75 lbs (34.02 kg) |
| Dimensions (L x W x H) | 520 x 269 x 222 mm / 20.47 x 10.59 x 8.74 in |
| Terminal Type | M8 / 1.25 — 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 |
| 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 — no import duties |
Battery Management System and Bluetooth Monitoring
The CLI300-12’s integrated BMS manages cell-level protection and balancing automatically — no external battery management required.
- 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. Monitor state of charge, voltage, current, and cell temperature in real time — useful for tracking system performance in RV, marine, and off-grid installations where direct battery access is limited.
System Compatibility and Installation
The CLI300-12 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 vessels, a DC-DC charger is recommended to deliver correct LiFePO4 charging parameters and protect the alternator from the battery’s high charge acceptance rate. M8 terminals with bolts are included. The battery installs upright or on its side in any standard Group 8D tray or enclosure.
For system sizing assistance 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 manufacturer. The CLI300-12 ships free to any address in Canada and the USA. Canadian and US buyers pay no import duties and face no cross-border complications on their orders.
The CLI300-12 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.
Joseph R. –
I purchased this battery to replace 3 12V 100Ah lead-acid batteries that were connected in Parallel. First of all, I love how I can carry it all by myself! The construction of the battery is really good, seems Canbat is using a strong ABS casing. Components like handle and terminals were also firm and really easy to work with. After testing this battery for 3 months now, I can say that the capacity is 105% accurate. The battery is listed as 300Ah but I was able to get about 320Ah total capacity. So overall amazing product thank you so much for the fast shipping (took only 4 days to arrive) and great customer service. If you’re looking to replace your RV/Trailer batteries, then this is the way to go.
Aleksandra Mrowka –
We bought this battery and had it shipped to Waskaganish, Quebec. The battery arrived in only 3 days and shipping was free. We haven’t installed the battery in our RV yet, but it sure looks like it’s very well built. Got the Bluetooth connected to the app and everything looks great. Customer support has also been great, both over chat and phone. Thank you ~ John and Deb
Christine V. –
Cette batterie a transformé l’utilisation de mon équipement audio professionnel. Non seulement elle alimente mes appareils de manière fiable, mais elle supporte également des charges et décharges à un nombre impressionnant d’ampérage sans s’abîmer. L’autonomie est exceptionnelle, et elle reste performante dans des conditions exigeantes. Un investissement robuste et fiable pour toute situation.
Larry V. –
Cette batterie est une merveille ! Elle est compatible avec mon chargeur solaire de 60A ! Je n’ai pas eu besoin de le changer. Merci au support technique de Canbat qui a répondu à toutes mes questions.
Guillaume P. –
J’ai commandé quatre de ces batteries pour ma cabane hors réseau et elles fonctionnent parfaitement comme batteries résidentielles. Je suis également impressionné par la qualité des chargeurs de Canbat; leur boîtier en aluminium nous fais ressentir l’effet de grande qualité !