Custom 12.8V 138Ah LiFePO₄ VanLife Battery

Custom 12.8V 138Ah LiFePO₄ VanLife Battery System

Professionally built using 4 Grade A BYD Blade LiFePO₄ cells, this custom battery features a 100A Daly Battery Management System (BMS), an active cell balancer, and includes a 50A fast charger.

With 138Ah (1,766Wh) of usable lithium power, this is an excellent upgrade for a van, RV, camper, trailer, work vehicle, or off-grid adventure setup.

Simply connect it to an inverter, and you'll have clean, reliable 120V AC power to run a portable refrigerator, charge laptops, phones, cameras, drones, Starlink, lighting, fans, power tools, and many of the everyday comforts of home while traveling.

One of the greatest luxuries of having a dedicated lithium battery system is being able to run a 12V portable refrigerator around the clock without worrying about draining your vehicle's starting battery. Whether you're road-tripping, overlanding, working out of your vehicle, or driving long-haul as a trucker, you can park for the night, shut the engine off, and wake up knowing your food, drinks, groceries, or even temperature-sensitive medications have stayed cold all night. Once you've traveled with a dedicated refrigerator powered by a battery like this, it's hard to imagine going back to buying bags of ice or dealing with melted coolers.

Another huge advantage is its compact size. This battery takes up remarkably little space and can easily sit on the floor behind a seat or in another small storage area, making it ideal for vehicles where every inch of space matters.

One of the biggest advantages of this setup is how simple it is to recharge. Pair it with a Victron Orion XS 12/12-50A DC-to-DC Charger, connected to your vehicle's alternator, and the battery automatically charges while you drive. For most travelers, that means your battery stays topped up simply by driving from one destination to the next, with little or no need to plug into shore power.

This is exactly how I currently have my full-time battery pack set up in my van, making it very easy for someone else to duplicate. Once installed, you simply drive as you normally would, and your alternator keeps the battery charged and ready for your next adventure.

### Real-World Performance (Approximate)

• Portable 12V camping fridge: 2–4 days
• Laptop charging: 20–30 full charges
• Smartphone charging: 100+ charges
• LED lighting: 100+ hours
• CPAP machine: Multiple nights (depending on model and humidifier use)

### Battery Condition

The battery management system currently shows only 23 charge cycles. Quality LiFePO₄ batteries are commonly rated for 3,000–6,000+ charge cycles, meaning this battery has used less than 1% of its expected service life. It's essentially just broken in and has many years of dependable use ahead of it.

### Features

✔ 12.8V 138Ah (1,766Wh) LiFePO₄ battery
✔ Built with Grade A BYD Blade lithium cells
✔ 100A Daly Battery Management System (BMS)
✔ Active cell balancer for maximum performance and extended battery life
✔ Includes a 50A fast charger
✔ Connects directly to an inverter for dependable 120V AC power
✔ Compact design that fits easily in vans, SUVs, trucks, and campers
✔ Perfect for van life, RVs, campers, trailers, overlanding, work vehicles, emergency backup power, and off-grid living

This battery was simply kept as a backup in my van and is no longer needed.

Paid $800
Asking $450

If you've been considering adding reliable off-grid power to your vehicle, this is a fantastic opportunity. You'll receive a premium custom-built lithium battery system that's barely been used, includes a 50A fast charger, and can easily be integrated into a charging system with a Victron Orion XS 12/12-50A DC-to-DC charger.

For anyone who spends time on the road, having dependable battery power completely changes the travel experience. Being able to keep a refrigerator running 24/7, charge your electronics, work remotely, and enjoy the comforts of home without constantly searching for hookups is incredibly convenient. It's a proven setup that has served me exceptionally well and is simple for the next owner to duplicate.

Excellent value at a fraction of the cost of building one yourself.