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Sun Fun Kits SFK-275SE User Manual

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SFK-275SE/SFK-300S USER MANUAL
REVISION 1.3
sunfunkits.com

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  • Page 1 SFK-275SE/SFK-300S USER MANUAL REVISION 1.3 sunfunkits.com...

  • Page 2: Table Of Contents

    SFK-275SE/SFK-300S LFP Battery TABLE OF CONTENTS INTRODUCTION WEIGHT & DIMENSIONS SAFETY GENERAL USAGE SAFE MODE MAX AMPS & VOLTAGE CHARGING & DISCHARGING LOW TEMP CHARGING GEN 2 SWITCH DATA PORT INVERTER SETTINGS MAINTENANCE MULTI-BATTERY SETUPS IOS & ANDROID APPS BMS ALERTS...

  • Page 3: Introduction

    Introduction THANK YOU Thank you for purchasing your Sun Fun Kits battery kit system, your battery has been hand built by Sun Fun Kits technicians in our Baton Rouge (Louisiana, USA) facility using components from China, United States, and India. We have tested your battery by performing a complete balance, capacity, and load test to ensure it is built to industry standards.
  • Page 4 Sun Fun Kits batteries DO NOT use reject / failed / grade B cells in their construction as is the case with practically all batteries coming directly from Chinese retailers.
  • Page 5 SFK-275SE/SFK-300S LFP Battery Fully compatible with existing 12v infrastructure including standard 12v lead acid/agm battery char- gers, trickle chargers and high voltage DC systems up to 48v (when in 4s series configuration). High and low temperature protection including optional temperature monitor with Active Balancer control.

  • Page 6: Weight & Dimensions

    SFK-275SE/SFK-300S LFP Battery Physical Specs WEIGHT & DIMENSIONS WIDTH: 7.5” HEIGHT: 10.6” Phys- ical, terminal studs will add 1”, total height combined is 11.6” LENGTH: 14.6” (including handles) Physical Attribute Value Notes Width 190 MM , 7.5 Inch The width will tapper out 6mm from the bottom to top.

  • Page 7: Safety

    Before you begin SAFETY Sun Fun Kits recommends an experienced electrician setup your battery bank system, or you have exten- sive knowledge and experience in setting up high power DC systems. Setting up batteries improperly can result in severe injury and even death. Please take caution when working with our batteries and ensure you...

  • Page 8: General Usage

    (FAA transportation study https://www.fire.tc.faa.gov/pdf/TC-16-17.pdf). Sun Fun Kits LifePo4 batteries may be used anywhere typical deep cycle lead acid/agm/flooded batteries are used and do not require special charging equipment as they have built in circuitry that ensures proper charging and discharging. It is recommended that you use lithium LifePo4 chargers whenever possible or set your charging apparatus to the AGM charging profile to ensure that your batteries can get fully charged.
  • Page 9 ) charger that can be used to fully charge your LifePo4 batteries for customers looking for a stand-alone wall outlet charger. Here are some acceptable uses for the SFK-275SE/SFK-300S battery: Use in RVs as a 12-48 volt power source, or as part of an inverter bank to provide standby power...

  • Page 10: Safe Mode

    MAX AMPS & VOLTAGE Sun Fun Kits SFK-275SE/SFK-300S batteries can be connected in parallel or in series. You can connect up to 4 batteries in series to achieve a maximum voltage of 58 volts (this is generally shown as 48v, the nominal reading) and you can parallel these batteries up to 4 units.
  • Page 11 *For power requirements greater than 4 kw continuous, you will need to have multiple banks of batteries connected to different inverters / dc banks. Sun Fun kits recommends using the highest possible voltage available in your power system for multi battery setups, and limiting the total output to below 125 amps, we also recommend using 2 AWG or lower pure copper wire.
  • Page 12 SFK-275SE/SFK-300S LFP Battery The charging and discharging parameters for the SFK-275SE/SFK-300S are listed below: Parameter Value Notes Low voltage cut-off 10.0-11.6 volts / 2.5 - 2.9 Battery will go into Safe Mode at this voltage. volts (cell) Full Charge 14.6 volts / 3.65 volts (cell) Maximum charge voltage.

  • Page 13: Charging & Discharging

    Charging & Discharging MAINTENANCE Sun Fun Kits Lithium Iron Phosphate batteries require minimal maintenance and do not need to have any liquid added to them such as water (as is the case with flooded lead acid) in order to keep charge. The only maintenance required is to ensure that the state of charge of the battery is in a reasonable state de- pending on how it is being used.

  • Page 14: Low Temp Charging

    Charging & Discharging LOW TEMP CHARGING The SFK-275SE/SFK-300S have built in low temperature protection, this features disables battery charging in temperatures below freezing. For discharging, the batteries can be allowed to discharge in cold weather at up to 0 degrees Fahrenheit by enabling it in the tools setting of the SFK BMS app.

  • Page 15: Gen 2 Switch

    Charging & Discharging LOW TEMP CHARGING Available as an optional add-on, the SFK-275SE/SFK-300S battery can be equipped with the GEN 2B switch. This accessory expands the functionality of the battery by allowing the user to monitor and control various functions such as enabling / disabling Bluetooth connectivity, setting up active balancer behavior, and having a way to monitor internal battery temperature while the battery is in use or at idle.

  • Page 16: Data Port

    (where the balancer will turn on when the battery is near full: 3.37v / cell, or about 13.5v pack voltage) or can disable active balancing and rely solely on passive BMS balancing. Sun Fun Kits recommends leaving the balancing mode to Hi Balance Mode...

  • Page 17: Inverter Settings

    Wiring & Setup INVERTER SETTINGS The SFK-275SE/SFK-300S is able to work with almost any 12v based inverter or charge converter as LFP chemistry by its nature allows it to be a drop-in replacement battery. If your device has a lithium mode, you can select this setting for optimal lithium settings.

  • Page 18: Maintenance

    If this occurs you will need to re-tighten your bolts. The main terminal bolts on the SFK-275SE/SFK-300S are under the battery case, to access this you will need to remove the 4 top M4 countersunk screws. Once the case is removed, you can use a M8 ball-end hex driver or L-wrench to ensure that they are snug and making proper contact with the brass conductor ring.
  • Page 19 SFK-275SE/SFK-300S LFP Battery Only use insulated tools when working with the battery with its lid open. We only recommend opening the lid of your battery with hand tools and not with powered screw- drivers or impact drivers. Ensure the wires are tight and make good contact with components, tighten if needed.

  • Page 20: Multi-Battery Setups

    NOTE: for many parallel setups we recommend the use of a common DC bus bar with equal wire lengths to ensure proper load splitting. The Sun Fun Kits DC Bus Bar works great for most parallel setups: https:// www.sunfunkits.com/product/35/heavy-duty-bus-bars-250a-600v . We always recommend you consult an electrician before proceeding to ensure your loads are adequately spread among your batteries.
  • Page 21 SFK-275SE/SFK-300S LFP Battery Wiring & Setup PARALLEL OPERATION The most common parallel setup is the 2P setup, where two batteries are connected in parallel thereby increasing battery capacity to 550 (275SE) - 600 (300S) AH while keeping the voltage at 13.0 volts. These setups can be used with piggyback cables, or can be set up using DC bus bars.
  • Page 22 SFK-275SE/SFK-300S LFP Battery For even greater capacity, the SFK-275SE/SFK-300S can be wired in 3P and 4P configurations, this will increase overall battery capacity to 825 (275SE) - 900 (300S) AH and 1100 (275SE) - 1200 (300S) AH re- spectively. NOTE: DEDICATED BUS BARS ARE REQUIRED FOR 3P AND 4P SETUPS. Sun Fun Kits...
  • Page 23 SFK-275SE/SFK-300S LFP Battery Wiring & Setup SERIES OPERATION With series configurations, you can increase your overall pack voltage while keeping the capacity the same. Below we show a 2S and a 2S2P setup (where two sets of 24v batteries are connected in parallel to increase voltage and capacity) this provides 24V - 300AH and 24v - 600AH respectively.
  • Page 24 SFK-275SE/SFK-300S LFP Battery For even higher voltage setups, the SFK-275SE/SFK-300S can be connected in 3S as well as 4S (36v, and 48v respectively) setups. These sets can not be paralleled in the same bank, if you require additional capacity you will need to create a separate bank. 4S or 48v is the maximum series connection supported by the SFK-275SE/SFK-300S, anything greater than this will permanently damage your battery.

  • Page 25: Ios & Android Apps

    BLE Bluetooth protocol, these apps are available at no charge and can work with all Sun Fun Kits products. Below we provide a basic overview of the app’s features (images in this manual are from the android version of the app):...
  • Page 26 (SOC), for this reason a 3.3 / cell or 13.2 volt reading may be as high as 80% SOC or as low as 30%, hence, the SFK-275SE/ SFK-300S uses columb readings to determine the soc of the battery.
  • Page 27 SFK-275SE/SFK-300S LFP Battery Management Apps CHARGING DISCHARGING STATUS Charging Enabled Charging Disabled This symbol indicates that charging for This symbol indicates that charging for the battery is enabled. the battery is disabled. Discharging Disabled Discharging Enabled This symbol indicates that discharging This symbol indicates that discharging for the battery is enabled.
  • Page 28 NOTE: The SFK-275SE/SFK-300S has 3 temperature probes which includes 1 BMS probe and 2 case probes, you can switch between the case probe temps by clicking the case temp gauge to switch between them .
  • Page 29 SFK-275SE/SFK-300S LFP Battery The tools tab is a powerful device management system that allows you to set parameters for the SFK- 275SE/SFK-300S battery, these options are discussed below: Battery Output: You can set options on your unit to enable or disable charging and discharging.
  • Page 30 Maximum Discharge Amps: This setting can be very useful in ensuring you do not overload your battery setup or devices. The range for the SFK-275SE/SFK-300S is between 40 to 200 amps, you can set a lower setting if you want to limit the output power of your battery.
  • Page 31 (e.g. it is reporting a higher percentage than it should or perhaps a lower percentage), you can use the reset capacity button to re-cal- ibrate the SFK-275SE/SFK-300S SOC meter. NOTE: This should only be done on a fully charged battery where each cell is reading 3.50 volts or higher (3.6V or higher is the ideal setting) and the bat-...
  • Page 32 EXTREMELY IMPORTANT do not forget your pin, if you lose your pin you will need to send your battery back to Sun Fun Kits to un- lock your battery. THERE IS NO WAY TO REMOTELY REMOVE A PIN IF YOU FORGET IT You also have the option to disable the pin code;...
  • Page 33 SFK-275SE/SFK-300S LFP Battery Poll Request: The poll request option specifies the number of times the app will contact your battery for updates. The lower the number, the more frequent the updates; the higher the number the less frequent. If you are ex- periencing connectivity issues you can adjust the poll rate request as needed to establish a stable con- nection.
  • Page 34 SFK-275SE/SFK-300S LFP Battery Management Apps BMS ALERT & ERROR LOG The logs tab will show you a summary of alerts & errors generated by the BMS inside your battery. This tab can help diagnose recurring issues you may be experiencing. NOTE: not all alerts are considered to be issues, it is common to see Cell &...

  • Page 35: Bms Alerts

    SFK-275SE/SFK-300S LFP Battery Management Apps BMS ALERTS Cell Condition Normal This symbol indicates that the battery is in normal condition and is operating optimally. Cell Overvolt Disables charging if the voltage of any cell exceeds 3.65. Charging is re-enabled when the cell’s voltage falls to 3.5.
  • Page 36 SFK-275SE/SFK-300S LFP Battery Management Apps BMS ALERTS Charge Over Temp Battery temperature exceeded the high temp threshold (130° F) during charging. Charging will be enabled once internal temperature falls below 115° F. Charge Under Temp Battery temperature is below the threshold (34° - 55° F) while charging.
  • Page 37 BMS damage. Charging / Discharging functions will be disabled until the short circuit has been corrected. Front-end IC Error This is a hardware error, please contact Sun Fun Kits Techs to request repair service for your battery. You can also submit a ticket online: https://www.sunfunkits.com/app/support...
  • Page 38 Sun Fun Kits website where you can view the details of your battery.
  • Page 39 NOTE: Access- ing this menu requires an access code that is only available to Sun Fun Kits Dealers and Sun Fun Kits Techs, you must contact them to obtain the code in order to access this menu.

  • Page 40: Multi-View

    SFK-275SE/SFK-300S LFP Battery Management Apps MULTI-VIEW With Multi-View, the Sun Fun Kits BMS app allows you to simultaneously view up to 4 de- vices. Multi-View will also show the combined amp and watt output of your batteries. NOTE: when connected in...
  • Page 41 SFK-275SE/SFK-300S LFP Battery The Multi-View system allows you to view up to 4 batteries simulta- neously, here you can view condensed information regarding your batteries. Due to space constraints some information is not displayed or has been truncated to fit on screen. For users that plan on using...
  • Page 42 NOTE: For devices connected wirelessly the graph can show up to 4 connected batteries or up to 16 cells. Future versions of the app and the SFK-275SE/SFK-300S with the RS485 hard link will support up to 16 connected batteries and 64 cells.
  • Page 43 SFK-275SE/SFK-300S LFP Battery Virtual Battery Settings: Multi-view supports saving battery configurations as virtual batter- ies. Virtual batteries are a quick way to reconnect to a configuration you have set up, e.g. if you have 2 batteries in parallel 12v, you can now save them as a virtual battery in the app.
  • Page 44 SFK-275SE/SFK-300S LFP Battery It is important to ensure your batteries are properly balanced be- fore setting up the maximum and minimum SOC limits. Imbalanced batteries can cause this functionality to not work as intended; if your SOC is not properly calibrated per battery, it will cause the app to send incorrect commands to the battery.

  • Page 45: Year Warranty

    SFK-275SE/SFK-300S Warranty 5 YEAR WARRANTY Sun Fun Kits guarantees purchases made from its website or authorized retailers are free from manu- facturer defects and will repair or replace battery and kits that fail to meet specifications at our discretion within the warranty period. Warranty is only offered to the original purchaser and will require a warranty transfer to any user that the battery has been sold to thereafter by the end user (limited to a maximum of 1 transfer).
  • Page 46 OEM specifications. Doing so will void the warranty. Changing BMS parameters with unauthorized tools Customer agrees to only use official Sun Fun Kits software tools made for IOS / Android / Windows to manage battery systems, the use of unauthorized software tools will void the warranty.
  • Page 47 110° Fahrenheit or lower than 20° for an extended period (greater than 4 hours) NOTE: Sun Fun Kits BMS system keeps an internal log and Sun Fun Kits technicians can determine if proper mainte- nance was not done.

  • Page 48: Legal Information

    Terms, Liabilities & Disputes LEGAL INFORMATION Sun Fun Kits LLC DBA Sun Fun Kits offers its products with the terms, conditions and notices as follows: The following terms and conditions apply to all sales and uses. Please review carefully. These terms and conditions include limited warranties and disclaimers of liabilities.
  • Page 49 In no event shall Sun Fun Kits; liability exceed the value of the product(s) sold. In no event shall Sun Fun Kits’ be liable for any direct, indirect, punitive, incidental, special or consequential damages whatsoever arising out of or connected with the use or misuse of any of its products.
  • Page 50 AAA by visiting www.adr.org and file the initiation fee. Sun Fun Kits will reimburse these fees to you if the arbitrator(s) finds in your favor, however, if the arbitrator(s) finds in Sun Fun Kits favor then no fees will be reimbursed.

  • Page 51: Test Report & Qr Code

    LFP Battery https://www.brla.gov/319/Civil-Suit-Interactive-Forms Terms, Liabilities & Disputes MODIFICATIONS TO TERMS Sun Fun Kits reserves the right to change the terms, conditions, and notices under which it’s products are offered at any time. Battery Quality Check TEST REPORT & QR CODE...
  • Page 52 Share with us twitter.com/sunfunkits Share a photo of you new SFK battery in action! Tag @sfkbattery and use #sunfunkits Sun Fun Kits LLC 11636 Industriplex Blvd Baton Rouge, Louisiana, 70809 United States of America 1-225-289-6525 www.sunfunkits.com cs@sunfunkits.com FCC ID: QDS-BRCM1078...

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Sfk-300s

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