The Next Evolution: SuperSlim 300 Gen 2 12V 304Ah LiFePO4 Battery

Optimized Square Profile | 300A High-Output BMS | UN38.3 Certified | IEC 62619 Certified EVE Cells | Cross-Capacity Parallel Ready | Integrated CAN/RS485 Communications | Australian In-House Engineered

Redefine your power limits with the Generation 2 SuperSlim 300. This unit completely rewrites the rules of battery geometry by packing a massive 304Ah capacity into an optimized square, ultra-slim frame that effortlessly slides into tight canopy corners, behind rear seats, or into narrow cargo false-floors. Engineered in-house at our workshop in Welshpool, Western Australia specifically for the brutal extremes of the Australian environment, it features a heavy-duty 300A Smart BMS, integrated CAN/RS485 communication protocols, independent active cell management, IEC 62619 certified EVE cells, and full UN38.3 transport certification. This powerhouse doesn't just store energy—it integrates directly with your premium electronics to deliver a professional-grade, closed-loop energy system.

100% Usable Capacity — Power Every Last Amp

Unlike traditional AGM or lead-acid batteries that damage themselves if discharged past 50%, 12VS Gen 2 Lithium batteries deliver 100% usable capacity.

• Get What You Pay For: A massive 304Ah 12VS battery gives you a full 304Ah of usable power right down to the low-voltage cutoff without dropping voltage or harming the cells.
• Half the Size, Twice the Power: Because you can use every single amp-hour, this single powerhouse effectively replaces a massive AGM bank more than double its physical size and weight, keeping your vehicle's setup incredibly compact and lightweight.

Unmatched Power Output, Revolutionary Slimline Design

The SuperSlim 300 Gen 2 isn't just powerful; it's a marvel of engineering. Boasting a staggering 300A continuous output, this battery is purpose-built to handle the heaviest loads, making it the perfect partner for your 3500W inverter. Power everything you could ever need simultaneously, effortlessly:

• Heavy Domestic Climate Control: Power roof-mounted or under-bunk air conditioning layouts to stay cool and comfortable even in the brutal outback heat.
• High-Draw Cooking Arrays: Seamlessly run multiple high-draw appliances like induction cookers, air fryers, and microwaves for quick, convenient meals on the go.
• Morning Brew: Enjoy your domestic camping kettle and coffee machine, no matter how remote your campsite is.
• Living Comforts & Utility: Continuous, clean 12V power for large chest/upright fridges, cooling fans, and high-draw 12V air compressors for recovery gear.
• Remote Tech & Communication: Stable, continuous power coverage for high-speed internet via Starlink Mini, plus rapid charging for laptops and camera gear.

Advanced Communication: Seamless Victron Integration via CAN-bus & RS485

Take full control of your power ecosystem with the system's advanced communication suite. The SuperSlim 300 Gen 2 is built to talk seamlessly with your high-end off-grid hardware:

• Direct GX Device Integration: Use a 12VS CAN-bus BMS Cable to link your primary battery directly with your Victron GX device (such as the Cerbo, Ekrano, or Venus). This establishes the master data link for the entire installation.
• Full System Visibility: View your precise State of Charge (SoC), live current draw, cell voltages, and battery health through your Victron touchscreen or remotely via the global online VRM Portal.
• True Closed-Loop Control: Your battery establishes a continuous digital handshake with the GX device. The GX device then automatically coordinates and commands your MultiPlus, Quattro, or SmartSolar MPPT controllers. This system-wide loop allows the BMS to dynamically dictate real-time charging limits, preventing over-voltage and maximizing cell longevity.
• Smart Parallel Networking: Seamlessly link multiple internal BMS units together using standard RJ45 UTP cables to sync data across the entire bank, ensuring balanced performance and unified system communication.

Revolutionary Cross-Capacity Paralleling Permitted

Traditional engineering rules say you can never mix lithium battery sizes in parallel—the Gen 2 JHB Series completely shatters that rule.

• Integrated JHB Parallel Current-Limiting Modules: Your integrated Daly JHB Smart BMS is manufactured with an onboard intelligent parallel current-limiting module. When multiple 12VS batteries are connected to form a common bank, the JHB hardware automatically detects any state-of-charge or voltage differences between the packs. If a voltage delta exists, the BMS instantly engages its inline current-throttling circuitry, safely capping the cross-pack current transfer to a pre-set internal limit while the batteries smoothly align themselves automatically.
• Mix & Match Capacities: You can safely mix and match different battery capacities within the 12VS parallel lineup, provided they share the same series BMS architecture.
• How it Works: The internal parallel modules dynamically throttle and balance current distribution based on each battery’s individual capability. The larger pack safely shoulders a proportionally larger share of the system load, while smaller packs are fully protected from over-stress.

Zero-Footprint Expansion: Dual-Stack Parallel Mounting Brackets

Need more Amp-hours without sacrificing precious floor space or canopy wall real estate? Our innovative optional parallel mounting brackets solve the ultimate space puzzle:

• Double the Capacity, Same Surface Area: Instead of expanding your setup outwards across your vehicle's layout, the dual-stack bracket system allows you to mount a second SuperSlim 300 directly behind the first using integrated mounting brackets.
• Zero Increase in Length or Width: Your footprint remains entirely unchanged—you only double the depth/thickness of the assembly, effectively doubling your total system capacity (608Ah total) in the exact same tight cavity.
• Secure Back-to-Back Architecture: Engineered specifically to lock two SuperSlim units rigidly together under severe off-road vibration, ensuring a clean, factory-finish installation behind rear seats or against narrow canopy walls.

Infinite Scalability: Series or Parallel Ready

Whether you need a higher-voltage system or a massive off-grid bank, the Gen 2 SuperSlim 160 is built to grow with your exact power demands.

• Series Flexibility: Connect up to 4 units in series to build 24V, 36V, or 48V systems. (Note: Batteries configured in series must match in capacity and age).
• Parallel Scalability: Connect up to 16 units in parallel to create a massive low-voltage power bank, utilizing our cross-capacity and dual-stack mounting options.
• Configuration Rule: Batteries can be set up in series or in parallel to expand your system, but standard drop-in units cannot be wired into a hybrid series-parallel matrix.
• Total Versatility: Perfect for custom 4WD canopy builds, slim marine bulkheads, and narrow caravan storage cavities where maintaining a low profile is critical.

Optimized Slimline Design — Built for Australian Adventures

Forget compromise. The SuperSlim 300 Gen 2 features an incredible optimized square profile, allowing it to mount completely out of sight and maximize your functional cargo space.

• Precision Dimensions: The standalone battery body measures a compact 550mm (H) x 490mm (W) x 93.7mm (D). With mounting brackets and terminals included, the single-unit footprint is 590mm (H) x 570mm (W) x 93.7mm (D). When dual-stacked using the optional parallel brackets, the width and height remain completely unchanged at 590mm (H) x 570mm (W), with the total thickness doubling to just 187.4mm (D).
• Integrated Mounting Brackets: Built with robust mounting brackets designed for secure, flush installation against flat surfaces, and engineered to support optional dual-stack parallel configurations without increasing your surface area.
• Vibration Protection: Designed with rugged durability in mind to protect internal architectures from brutal, corrugated outback tracks.

AS/NZS 3001.2:2022 Ready (Installer Compliant)

Our batteries are engineered to meet the strict structural, terminal security, and cell isolation benchmarks required by the latest Australian/New Zealand standards for habitable vehicles and marine craft.

Important Installation Note: To fully comply with AS/NZS 3001.2:2022, if this lithium battery is installed within a habitable location of a caravan, motorhome, or camper, it must still be housed within a sealed enclosure that vents directly to the outside of the vehicle.

Premium Engineering & Certified Safety

Every SuperSlim 300 Gen 2 reflects our in-house dedication to uncompromised quality, featuring top-tier components for maximum safety and a 10+ year service life:

• In-House Australian Engineering: Custom-architected locally in Welshpool, WA to survive corrugated outback tracks, extreme heat, and rigorous off-grid demands—not a generic off-the-shelf factory box.
• Grade A+ EVE Cells (IEC 62619 Certified): Built using globally recognized EVE prismatic cells certified to IEC 62619 safety standards, renowned for exceptional energy density, superior thermal stability, and unwavering reliability on rough outback tracks.
• Pack-Level IEC 62619 Certification In Progress: The fully assembled battery pack is currently undergoing official IEC 62619 certification testing, reinforcing our commitment to rigorous third-party compliance and safety standards.
• UN38.3 Certified Safety: Fully tested and certified for safe transport and vibration resistance, ensuring the internal cell architecture stands up to corrugated outback tracks and rigorous shipping conditions.
• Inbuilt Smart 300A BMS: A cutting-edge, high-current Battery Management System providing robust protection against overcharge, over-discharge, over-current, short circuits, and temperature extremes, while supporting stable CAN/RS485 networks.
• Separate Heltec 5A Active Balancer: This dedicated active balancer meticulously equalizes cell voltages 24/7. Working independently of the BMS, it physically transfers energy from the highest cells to the lowest cells at a high 5A rate, maximizing efficiency, boosting performance, and significantly extending the overall lifespan of your battery pack.
• Dual-Path Monitoring: Get complete visibility into your system. Use the official Bluetooth App for a deep dive into individual cell voltages and BMS temperature sensors when you are near the vehicle, or let the Victron GX integration push your data to the VRM Portal for remote system health monitoring from anywhere in the world. Download the official app here:
  • Apple App Store (iOS): DALY BMS Apple Store
  • Google Play Store (Android): DALY BMS Google Play Store
• 5-Year Warranty: Backed directly at our base in Welshpool, WA. If you have a technical query or need support, you are dealing directly with local technicians who understand Australian off-grid configurations.
• Battery Monitor Configuration: If using a Victron SmartShunt or BMV-712 Battery Monitor, settings can be found here: Victron SmartShunt / BMV Settings.

Don't let space or power limitations hold you back. The SuperSlim 300 Gen 2 offers the perfect fusion of massive capacity, a revolutionary slimline square design, and total closed-loop communication control, all backed by in-house Australian engineering and certified safety. Get yours today from our base in Welshpool, WA, and transform your custom build into a high-performance power hub!

NOTE: Generation 2 Batteries are not compatible with Generation 1 Batteries and cannot be connected together in series or parallel.