SFK315EX 12.8v 315 AH 4.1 kWh Victron Communications Bluetooth Dual Heating Lithium Battery

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SFK315EX Battery

• 12.8 Nominal (12v) LFP Battery
• 315 AH / 4.1 kWh Capacity
• Low/High Temp. Protection
• Smart BMS w/Bluetooth
• RS-485 Data Port (Optional)
• Multi-function I/O
• 2.4 kW Discharge
• Serviceable / Upgradeable

CERTIFIED Cells

Every SFK315EX has its UNIQUE manufacturer test report and cell data on the battery. TRY IT OUT! Scan the QR code on this image with your phone and you will see the capacity tests, manufacture date, IR and voltage values as well as batch ids of each cell used in your battery. Sun Fun Kits batteries use Certified UL1973 & UL9540A Cells.

Victron Communication

The SFK315EX is Victron Communication ready using the SFK data port and SFK data cable.

Multi-function I/O

The SFK315EX includes the GEN 2 B switch multi-function i/o that allows users to turn on/off Bluetooth, set standby or low temp heating, and also set active balancing modes.

USA

WARRANTY & SUPPORT

All Sun Fun Kits products & batteries are built, warrantied, and supported in the USA in our facility in Baton Rouge, Louisiana. You will not need to call overseas in the middle of the night to get help, contact us or any of our growing list of dealers to help resolve any of your issues.

2 (48V) Series Or 4 (24V) Parallel

The SFK315EX is one of the very few batteries on the market that can be connected in series up to 48V while also including functionality to allow for low temperature self heating. You can also parallel your batteries with up to 4 units (bus bars are needed to ensure proper balancing).

Sun Fun Kits batteries are designed to be serviceable and upgradable which means you can easily change components or service your battery; but you won't have to worry about this because you're covered for 10 years with our USA warranty (dealer installed, 8 years self installed).

Low Temperature Heating

High quality silicone rubber heating pads ensure your SFK315EX stays nice and warm during cold weather charging. The system is automatic and does not require jumper cables or switches. Simply set the minimum required temperature in the SFK BMS app and your battery will begin to heat itself so you can charge your battery safely.

The Sun Fun Kits Smart BMS allows you to configure your batteries to suit your needs. Use Multi-View to see the combined output of multiple batteries, set charge and discharge limits in tools, or benchmark your battery to see its performance.

The lightest battery in it's class at only 60.00 Lbs., while also having the smallest possible footprint.

Bespoke Construction using purpose built casings, not generic space wasting molds common form many Asian brands.

Bespoke
Construction

SFK135EX Battery

Heating Modes

Automatic low temperature charging heating, or set standby heating where the battery uses its own power to keep itself warm (even when not charging).

Active Balancing Modes

Always on, or only on when the battery is near full, or disable active balancing and use passive balancing.

Bluetooth

Enable or disable bluetooth for maximum security.

100's of cycles later and your battery
will remain balanced guaranteed!

A 5 amp balancer ensures the SFK315EX cells do not drift like other batteries. Certified UL1973 & UL9540A cells ensure long usage life worry free.

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The SFK315EX combines the best of high performance and endurance in our popular 12v drop in lead acid replacement line of pre-built batteries. It features a colossal 315 Ah / 4.1 kWh of available capacity and has cells rated for up to 8000 cycles at 80% depth of discharge. The SFK315EX is the lightest and most energy dense LFP battery on the market that also features built in heating elements for low temperature charging, a 200A bms, support for 4s series (48v) connections, an easy to use smart app, and features enhanced Victron communication.

The SFK315EX is hand built by Sun Fun Kits technicians in Baton Rouge, Louisiana and is built to order. This battery uses components from the United States, China and India and has gone through a complete balance, capacity and load test to ensure it is built to industry standards. Your battery comes ready to use and we recommend you review the user guide on how to get the optimum performance and longevity of your unit.

Built with UL1973 & UL9540A certified cells with complete individual cell level manufacturer test reports, you will love the reliability of certified cells that will stay in balance, hold voltage during heavy loads, and also have the power to output up to 2,400 watts to power up even the most demanding of devices. Our onboard 5 amp active balancer ensures cells stay in balance even after hundreds of cycles. 

The GEN 2 B switch gives users greater control over their battery kit as the Bluetooth system can be turned on or off, users are able to fully manage the built- in active balancer, and they are able to view battery temperature with the onboard temperature monitor. The 315EX is also the only battery on the market that supports both standby heating (heat your battery even without charging) as well as automatic low temperature heating, many smart batteries only support 1 mode.

With apps available for both IOS & Android (coming soon for Windows & Mac OS), you will love the SFK BMS app as its the only app on the market that allows you to adjust battery settings, create virtual batteries, perform battery capacity testing, and shows complete cell and warranty data on your battery. We pioneered multi-view as well as the auto-dashboard where you can view multiple batteries at once as a virtual battery and continue to update our app regularly. Rest assured that the SFK315EX is backed by the most capable and user-friendly companion app on the market.

• 4.1 (range is between 4.0 - 4.2 kWh on average) kiloWatt hours of reliable lithium power, replaces up to 6 lead acid / agm batteries (100ah) and is designed to be discharged to 100% of available capacity without harm to the battery.
• Up to 2.4 kiloWatts of peak power, and 1500 watts of continuous power.
• 200 amp discharge capable, 125 amp continuous rating (can run 125 amps form 100% to 0% without hitting thermal cut-off limit).
• GEN 2 B Switch allows Bluetooth to be turned on/off, full active balancer control, and can show battery temperature.
• Expected cycle life of 8000 cycles at 80% DOD, and up to 11000 cycles at 50% DOD, 12-15 year usage life.
• Fully compatible with existing 12v infrastructure including standard 12v lead acid/agm battery chargers, trickle chargers and high voltage DC systems up to 48v (when linked in series with 4 batteries).
• Built-in cell heaters to allow for low temperature charging, temperature to activate heaters can be set inside the app, users can also test heating via the app.
• Triple Heating Modes! The only battery on the market that lets users select how the heating system works, select form automatic low temp charging heating, or use standby heating to keep the battery warm even when its idle, or you can disable heating altogether and use low temperature protection only.
• User selectable Max/Min State of charge, you can set upper and lower state of charge limits on your battery, e.g. set a lower limit of 20%, once the battery reaches this limit discharging will become disabled. Alternatively you can set an upper limit to 80%, so now you can leave your rv/coach plugged in and your battery will not be stressed as it will stop charging at 80% there by extending it's life.
• Data Port allows direct integration with Victron systems with the Venos OS compatible devices like the Cerbo GX (when using the SFK data cable), other systems like Votronics, Growatt, Lux Power and many more will become available when the SFK hub is released. 
• Smart phone/device compatible with Bluetooth monitoring/configurable app. Available for IOS/Android.
• Can be linked in series up to 48v (4 batteries in series) as well as up to 4 in parallel with a combined output of 5.0 kW continuous.
• Automatic low/high temperature and low/high voltage cut-off to stop battery damage from occurring.
• Automatic short circuit prevention as well as over charge and over discharge prevention.

The latest and greatest! Huge capacity and endurance, with over 315 Ah of capacity and 8000 rated cycles the 315EX is the succesor to both the legendary SFK-300HP and SFK-275EX batteries. Available in both EX and EX+ (coming soon), the 315EX battery is equiped with the GEN 2 B switch, RS-485 data port (optional), Victron Communication, and triple heating modes (low temp charging, standby heating or disabled) making it the NEW ultimate battery!

• Use in RVs as a 12-48 volt power source, or as part of an inverter bank to provide standby power
• Use in solar panel installs as a power source for storing power
• Use in troller motor applications for boats (requires ensuring that the battery is isolated and protected from water intrusion)
• Use in Golf Carts or other small electric vehicles that have amperage governors (care must be taken to ensure that the batters are protected from water intrusion)
• As a DC power source for power supplies and other items needing DC power
• Use in DC to AC inverters where standby / backup power is needed such as data centers, or residential power sources.