WattCycle 25.6 V 314 Ah Ultra Lithium Battery serves as the reliable heart of every off-grid expedition, packing 8.03 kWh of energy into a travel-ready, compact chassis. Engineered to support demanding loads and extended journeys, it sets a new standard for mobile power independence.
The Weight and Space Dilemma in Mobile Power
For decades, lead-acid banks have defined mobile power—until their cumbersome weight and bulk began to hold adventurers back. A typical 12 V, 100 Ah lead-acid module can weigh over 60 lbs and demands frequent water maintenance, while its limited cycle life (often under 1,000 cycles at 50 % DoD) drives up replacement costs and downtime. For RV enthusiasts and marine captains alike, traditional lead-acid banks often translate into lost cargo space and extra weight that eats into payload capacity. Hauling hundreds of pounds of battery bulk not only limits room for gear but also increases fuel consumption and maintenance stops, as aging cells demand frequent water top-offs and replacements. It’s this struggle between capacity and convenience that has driven the search for a lighter, more compact energy solution—one that delivers high output without sacrificing valuable real estate on board.
Meet the Ultra Lithium: Big Energy, Small Package
This 25.6 V 314 Ah Ultra Lithium LiFePO4 Battery occupies just an 18.9 × 14.25 × 9.53 inch in footprint and tips the scales at only 153.99 lbs. Inside that streamlined enclosure lies 8.03 kWh of usable energy—equivalent to a bulky lead-acid bank nearly twice its size. By condensing high-capacity storage into a single, manageable module, Ultra Lithium frees up valuable space for gear, provisions, or additional power modules in your RV, boat, or off-grid system.
EVE Grade A+ Cells at Work
At the core of the Ultra Lithium battery are EVE Grade A+ LiFePO4 cells—renowned for their reliability, uniform performance, and long service life. These same premium cells power WattCycle’s best-selling Mini series, trusted by tens thousands of RVers and off-grid users across US. Their superior cell matching and low internal resistance ensure stable output under load, while their high energy density allows more usable capacity in a smaller footprint. With built-in thermal and chemical stability, EVE Grade A+ cells also add an extra layer of safety in harsh environments where consistency is critical.
Decades of Reliable Power
The Ultra Lithium battery is engineered to endure—delivering over 6,000 charge and discharge cycles at 80 % depth of discharge (DoD). That translates to more than 15 years of dependable service under regular use, without noticeable capacity fade. Whether it’s powering your off-grid cabin year-round or supporting solar backup in your RV, this extended cycle life drastically reduces the need for replacements. Fewer battery swaps mean fewer expenses and less downtime—making the Ultra Lithium not just a power upgrade, but a long-term investment in energy security.
High Power Output for Demanding Loads
When your system demands serious current, the Ultra Lithium delivers. With a continuous discharge rate of 300 amps—equivalent to 7,680 watts of output power—this battery is built to handle high-demand applications without hesitation. Whether you're starting a heavy-duty inverter, running a rooftop air conditioner, or powering deck motors and refrigeration systems on board, this 25.6 V 314 Ah Ultra Lithium battery responds instantly and reliably. Its robust power output ensures smooth operation of sensitive electronics and large appliances alike, even under peak load conditions.
Exceptional Temperature Resilience
From frigid winter mornings in the Rockies to scorching summer afternoons on the Gulf Coast, this 25.6V 314Ah Ultra Lithium battery is built to perform when conditions are anything but ideal. With a wide operating range—charging from –5 °C (23 °F) to 60 °C (140 °F) and discharging from –25 °C (–13 °F) to 75 °C (167 °F)—this battery maintains stable performance in extreme environments where other chemistries falter. Whether installed in an exposed RV compartment or a marine engine bay, you can count on consistent output and protection from thermal damage, season after season.
WattCycle APP Bluetooth Monitoring
Stay connected to your power system no matter where the road—or water—takes you. With built-in Bluetooth functionality, the Ultra Lithium battery pairs effortlessly with the WattCycle mobile APP(available on iOS and Android), giving you instant access to real-time data. Monitor state of charge (SoC), voltage, current, temperature, and cycle count with just a few taps on your phone. The system also provides automatic alerts for over-current, low temperature, or other potential issues—so you can take action before it affects performance. It’s smart, simple, and designed to keep you in control at all times. Learn more about WattCycle Bluetooth APP please reading out Bluetooth guide blog.
8-Layer BMS protection and Military-Grade Casing
At the core of the Ultra Lithium’s reliability is a high-performance 300A Battery Management System (BMS) designed with eight layers of active protection. It continuously monitors and safeguards against over-charge, over-discharge, over-current, short-circuit, high temperature, low temperature, cell imbalance, and reverse polarity—ensuring safe operation even under extreme conditions. The battery is enclosed in a UL94 V-0 flame-retardant ABS+PC housing that resists heat, impact, and environmental wear. Rugged M8 terminals provide secure, corrosion-resistant connections built to withstand moisture, vibration, and salt air—making this battery as tough as it is intelligent.
Modular Scalability: Build Up to 64 kWh
Whether you're powering a weekend camper or designing a full-scale off-grid system, the Ultra Lithium offers flexible scalability to match your energy needs. Connect up to two batteries in series for a 51.2 V system, or expand in parallel up to four units for a total of 1,256 Ah capacity—delivering over 64 kWh of usable energy. This modular approach allows you to start small and expand as your setup grows, with seamless integration into RVs, marine power systems, solar arrays, and home energy storage solutions. One battery or many, the performance remains consistent and reliable.
Ready to upgrade your power system with WattCycle? View WattCycle 25.6 V 314 Ah Ultra Lithium Battery the full technical data sheet and sizing guide to explore detailed specifications and integration options. Whether you're designing a solar backup system, retrofitting your RV, or scaling up for off-grid living, our team is here to help. Contact a WattCycle specialist for expert consultation, personalized system recommendations, and guidance on installation and configuration. Let us help you build a smarter, more efficient power solution—tailored to your needs and built to last.
