{"product_id":"12v-300ah-self-heating-lifepo4-battery-250a-bluetooth","title":"12.8V 300Ah 250A Heavy Duty Self-Heating LiFePO₄ w\/Bluetooth","description":"\u003cdiv class=\"sapphire-product-description\" role=\"region\"\u003e\n\u003c!-- Title --\u003e\n\u003ch2 class=\"sapphire-title\"\u003e12.8V 300Ah Heavy Duty Self-Heating LiFePO₄ Battery with 250A Bluetooth BMS\u003c\/h2\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003c!-- Overview --\u003e\n\u003cp class=\"sapphire-p\"\u003e\u003cstrong\u003eCold-weather capability. Massive capacity. Even more output.\u003c\/strong\u003e This premium 300Ah LiFePO₄ battery combines \u003cstrong\u003e3840Wh of energy storage\u003c\/strong\u003e, automatic self-heating, Bluetooth monitoring, upgraded internal wiring, and an ultra-heavy-duty \u003cstrong\u003e250A continuous-discharge BMS\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eBuilt for demanding RV, marine, off-grid, mobile-workshop and backup-power systems, it delivers the capacity needed for extended runtime while supporting substantially larger loads than conventional lithium batteries equipped with 100A or 150A BMS units.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eThe integrated heating system also allows the battery to accept a charge in freezing conditions. When the cells are too cold for safe charging, the system warms them before charging is enabled—an important advantage for winter camping, cabins, work trailers and other unheated installations.\u003c\/p\u003e\n\u003c!-- Why You'll Love This --\u003e\n\u003ch3 class=\"sapphire-h3\"\u003eWhy You’ll Love This\u003c\/h3\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003cul class=\"sapphire-checklist\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eHuge 3840Wh Capacity:\u003c\/strong\u003e Provides extended runtime for off-grid, RV, marine and backup-power systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-Heavy-Duty 250A BMS:\u003c\/strong\u003e Supports demanding DC loads and high-output inverter systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUpgraded Internal Wiring:\u003c\/strong\u003e The battery’s internal current path has been strengthened to support its higher continuous-output rating.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Self-Heating:\u003c\/strong\u003e Warms the cells when required so the battery can safely begin charging in freezing conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBluetooth Monitoring:\u003c\/strong\u003e View state of charge, current, cell voltages, temperatures, alarms and other live battery information from your phone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFast Charging:\u003c\/strong\u003e Accepts up to 100A when paired with suitable lithium-compatible charging equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExpandable Systems:\u003c\/strong\u003e Supports series, parallel and combined 4S4P battery-bank configurations using matching batteries.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5-Year Limited Warranty:\u003c\/strong\u003e Long-term coverage backed by Sapphire Energy.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Premium Model --\u003e\n\u003ch3 class=\"sapphire-h3\"\u003eThe Premium 300Ah Model\u003c\/h3\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003cp class=\"sapphire-p\"\u003eThis model builds on the capacity and performance of our standard High Output 300Ah battery, adding both cold-weather charging capability and substantially greater continuous-current capacity.\u003c\/p\u003e\n\u003ctable class=\"sapphire-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003e250A Self-Heating Model\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCapacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e300Ah\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eNominal Energy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e3840Wh\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eContinuous Discharge\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e250A\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApproximate DC Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e3200W at 12.8V\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSelf-Heating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBluetooth Monitoring\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eYes\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInternal Wiring\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eUpgraded for 250A Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv class=\"sapphire-callout sapphire-callout-yellow\"\u003e\n\u003cp class=\"sapphire-p\" style=\"margin: 0;\"\u003e\u003cstrong\u003eChoose this version when:\u003c\/strong\u003e the battery may need to charge below freezing, your system has unusually demanding DC loads, or you want greater operating headroom for a high-output inverter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Self Heating --\u003e\n\u003ch3 class=\"sapphire-h3\"\u003eAutomatic Cold-Weather Heating\u003c\/h3\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003cp class=\"sapphire-p\"\u003eLiFePO₄ cells can safely discharge at temperatures below freezing, but charging frozen cells can cause permanent internal damage. This battery combines low-temperature charge protection with an automatic internal heating system.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eWhen charging is attempted at approximately \u003cstrong\u003e0°C or below\u003c\/strong\u003e, the heating system warms the cells instead of immediately allowing charge current into them. Normal charging is released once the battery reaches approximately \u003cstrong\u003e+5°C\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cul class=\"sapphire-checklist\"\u003e\n\u003cli\u003eHelps prevent damaging low-temperature charging\u003c\/li\u003e\n\u003cli\u003eAutomatically warms the battery when required\u003c\/li\u003e\n\u003cli\u003eAllows charging to resume after the cells reach a safe temperature\u003c\/li\u003e\n\u003cli\u003eIdeal for Canadian winters and unheated battery compartments\u003c\/li\u003e\n\u003cli\u003eNo separate heater controller or manual heater switch required\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"sapphire-callout sapphire-callout-yellow\"\u003e\n\u003cp class=\"sapphire-p\" style=\"margin: 0;\"\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e Self-heating does not make the battery immune to extreme cold. Available charging power, insulation, ambient temperature and installation conditions all affect how quickly the cells can warm. Whenever practical, install the battery in a dry, insulated and protected compartment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- High Output Power --\u003e\n\u003ch3 class=\"sapphire-h3\"\u003eBuilt for Serious Current\u003c\/h3\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003cp class=\"sapphire-p\"\u003eThe integrated \u003cstrong\u003e250A Bluetooth Battery Management System\u003c\/strong\u003e and upgraded internal wiring allow this battery to deliver up to 250A continuously under suitable operating conditions.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eAt the battery’s nominal 12.8V voltage, 250A represents approximately \u003cstrong\u003e3200W of DC power\u003c\/strong\u003e. This provides additional operating headroom for large inverters, powerful DC equipment, trolling motors, pumps, hydraulic systems, communications equipment and mobile-workshop loads.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eA 250A BMS rating does not automatically mean that every 3000W inverter can operate continuously from one battery. At lower battery voltages, a 3000W inverter can draw more than 250A after inverter losses are included. Continuous load, startup surge, inverter efficiency and low-voltage operating current must all be checked.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eProperly sized battery cable, busbars, disconnects, terminal connections and external over-current protection are essential when operating at high current.\u003c\/p\u003e\n\u003c!-- Example Runtime --\u003e\n\u003ch3 class=\"sapphire-h3\"\u003eExample Loads and Estimated Runtime\u003c\/h3\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003cp class=\"sapphire-p\"\u003eWith 3840Wh of nominal energy storage, this battery can operate light loads for several days or supply demanding equipment for shorter periods. The higher-output BMS increases the amount of power available at one time; it does not change the battery’s total stored energy.\u003c\/p\u003e\n\u003ctable class=\"sapphire-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eExample Load\u003c\/th\u003e\n\u003cth\u003eTypical Consumption\u003c\/th\u003e\n\u003cth\u003eEstimated Runtime\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStarlink Mini\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~30W\u003c\/td\u003e\n\u003ctd\u003eUp to 128 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDiesel Heater\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~10–20W average\u003c\/td\u003e\n\u003ctd\u003eApproximately 190–240 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLED Lighting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~25W\u003c\/td\u003e\n\u003ctd\u003eUp to 154 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCPAP Machine\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~40W\u003c\/td\u003e\n\u003ctd\u003eUp to 96 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e50 lb 12V Trolling Motor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e10–20A at trolling speed\u003c\/td\u003e\n\u003ctd\u003eApproximately 15–30 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e12-Cup Coffee Maker\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~1000W while brewing\u003c\/td\u003e\n\u003ctd\u003eApproximately 20 full pots\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e1200W Microwave\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e~1500W input\u003c\/td\u003e\n\u003ctd\u003eApproximately 120 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"sapphire-p\"\u003e\u003cem\u003eRuntime estimates are based on typical equipment consumption and a fully charged 3840Wh battery. Actual results vary with equipment efficiency, temperature, wiring losses, inverter consumption, battery condition, operating speed and usage patterns. Coffee estimates assume normal brewing cycles without extended use of the warming plate.\u003c\/em\u003e\u003c\/p\u003e\n\u003c!-- Bluetooth --\u003e\n\u003ch3 class=\"sapphire-h3\"\u003eBluetooth Battery Monitoring\u003c\/h3\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003cp class=\"sapphire-p\"\u003eThe integrated Bluetooth BMS provides real-time access to detailed battery information using a compatible mobile app. You can check battery operation without opening the compartment or installing a separate display.\u003c\/p\u003e\n\u003cul class=\"sapphire-checklist\"\u003e\n\u003cli\u003eBattery state of charge\u003c\/li\u003e\n\u003cli\u003eLive battery voltage and current\u003c\/li\u003e\n\u003cli\u003eCharge and discharge power\u003c\/li\u003e\n\u003cli\u003eIndividual cell voltages\u003c\/li\u003e\n\u003cli\u003eCell-balancing status\u003c\/li\u003e\n\u003cli\u003eInternal temperature readings\u003c\/li\u003e\n\u003cli\u003eCharge and discharge status\u003c\/li\u003e\n\u003cli\u003eActive alarms and BMS protection conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"sapphire-callout sapphire-callout-yellow\"\u003e\n\u003cp class=\"sapphire-p\" style=\"margin: 0;\"\u003e\u003cstrong\u003eParticularly Useful in Winter:\u003c\/strong\u003e Bluetooth monitoring lets you view battery temperature and confirm when the battery is heating, accepting a charge or waiting for the cells to reach a safe charging temperature.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Features --\u003e\n\u003ch3 class=\"sapphire-h3\"\u003eFeatures\u003c\/h3\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003cul class=\"sapphire-checklist\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e300Ah\u003c\/strong\u003e nominal capacity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3840Wh\u003c\/strong\u003e nominal energy storage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e250A\u003c\/strong\u003e maximum continuous discharge\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100A\u003c\/strong\u003e maximum charge current\u003c\/li\u003e\n\u003cli\u003eUltra-heavy-duty Bluetooth BMS\u003c\/li\u003e\n\u003cli\u003eUpgraded high-current internal wiring\u003c\/li\u003e\n\u003cli\u003eAutomatic internal self-heating\u003c\/li\u003e\n\u003cli\u003eLow-temperature charge protection\u003c\/li\u003e\n\u003cli\u003eMobile app battery monitoring\u003c\/li\u003e\n\u003cli\u003eAutomatic cell balancing\u003c\/li\u003e\n\u003cli\u003eOver-charge protection\u003c\/li\u003e\n\u003cli\u003eOver-discharge protection\u003c\/li\u003e\n\u003cli\u003eOver-current protection\u003c\/li\u003e\n\u003cli\u003eShort-circuit protection\u003c\/li\u003e\n\u003cli\u003eHigh-temperature protection\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eGrade A LiFePO₄ cells\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5000+ cycle\u003c\/strong\u003e design life under suitable operating conditions\u003c\/li\u003e\n\u003cli\u003eSeries connectable up to \u003cstrong\u003e4S\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eParallel connectable up to \u003cstrong\u003e4P\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCombined configurations up to \u003cstrong\u003e4S4P\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eCompact enclosure with dual rope carry handles\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e5-Year Limited Warranty\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Perfect For --\u003e\n\u003ch3 class=\"sapphire-h3\"\u003ePerfect For\u003c\/h3\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003cul class=\"sapphire-checklist\"\u003e\n\u003cli\u003eWinter RVing and cold-weather camping\u003c\/li\u003e\n\u003cli\u003eRVs, campers, motorhomes and van conversions\u003c\/li\u003e\n\u003cli\u003eOff-grid cabins and tiny homes\u003c\/li\u003e\n\u003cli\u003eUnheated solar battery compartments\u003c\/li\u003e\n\u003cli\u003eFishing boats and electric trolling motors\u003c\/li\u003e\n\u003cli\u003eMarine house-power systems\u003c\/li\u003e\n\u003cli\u003eHigh-output 12V inverter systems\u003c\/li\u003e\n\u003cli\u003eService trucks, trailers and mobile workshops\u003c\/li\u003e\n\u003cli\u003eSolar and wind energy-storage systems\u003c\/li\u003e\n\u003cli\u003eStarlink and remote communications equipment\u003c\/li\u003e\n\u003cli\u003eDiesel heaters and winter camping systems\u003c\/li\u003e\n\u003cli\u003eCPAP machines and overnight medical equipment\u003c\/li\u003e\n\u003cli\u003eAmateur and HAM radio stations\u003c\/li\u003e\n\u003cli\u003eEmergency backup and disaster preparedness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- Charging --\u003e\n\u003ch3 class=\"sapphire-h3\"\u003eFast, Flexible Charging\u003c\/h3\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003cp class=\"sapphire-p\"\u003eThe battery supports charging currents of up to \u003cstrong\u003e100A\u003c\/strong\u003e when paired with suitable lithium-compatible charging equipment. It may be charged from a programmable AC charger, solar charge controller, DC-to-DC alternator charger or inverter\/charger.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eLower charging currents are also acceptable. Charging at 40A or 50A places less demand on generators, shore-power connections, alternators and charging equipment while still providing practical recharge times.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eFor best results, use equipment with a dedicated or programmable LiFePO₄ charging profile. Lead-acid equalization and desulfation modes must be disabled.\u003c\/p\u003e\n\u003c!-- Expandable --\u003e\n\u003ch3 class=\"sapphire-h3\"\u003eExpandable Battery Banks\u003c\/h3\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003cp class=\"sapphire-p\"\u003eThis battery can be used individually or combined with matching batteries for larger systems. Up to four batteries may be connected in series, and up to four may be connected in parallel.\u003c\/p\u003e\n\u003cul class=\"sapphire-checklist\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Series Configuration:\u003c\/strong\u003e 4 batteries for a 51.2V nominal battery bank\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Parallel Configuration:\u003c\/strong\u003e 4 batteries for up to 1200Ah at 12.8V nominal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Combined Configuration:\u003c\/strong\u003e Up to 4S4P using 16 matching batteries\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"sapphire-p\"\u003eConnected batteries must be the same model, capacity, age and state of charge. Each battery should be individually charged and verified before assembling a series or parallel bank. Do not combine this 250A self-heating model in the same bank with the non-heating 200A version.\u003c\/p\u003e\n\u003c!-- Specifications --\u003e\n\u003ch3 class=\"sapphire-h3\"\u003eSpecifications\u003c\/h3\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003ctable class=\"sapphire-spec-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eChemistry\u003c\/th\u003e\n\u003ctd\u003eLiFePO₄ (Lithium Iron Phosphate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNominal Voltage\u003c\/th\u003e\n\u003ctd\u003e12.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e300Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNominal Energy\u003c\/th\u003e\n\u003ctd\u003e3840Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBattery Management System\u003c\/th\u003e\n\u003ctd\u003e250A Bluetooth BMS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Continuous Discharge\u003c\/th\u003e\n\u003ctd\u003e250A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApproximate Continuous DC Output\u003c\/th\u003e\n\u003ctd\u003e3200W at 12.8V nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Charge Current\u003c\/th\u003e\n\u003ctd\u003e100A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSelf-Heating\u003c\/th\u003e\n\u003ctd\u003eAutomatic internal cell heating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeating Activation\u003c\/th\u003e\n\u003ctd\u003eApproximately 0°C during charging\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCharging Release Temperature\u003c\/th\u003e\n\u003ctd\u003eApproximately +5°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLow-Temperature Protection\u003c\/th\u003e\n\u003ctd\u003eAutomatic low-temperature charge protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBluetooth\u003c\/th\u003e\n\u003ctd\u003eMobile app monitoring for compatible iOS and Android devices\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCell Balancing\u003c\/th\u003e\n\u003ctd\u003eAutomatic BMS-controlled balancing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCycle Life\u003c\/th\u003e\n\u003ctd\u003e5000+ cycles under suitable operating conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions (L × W × H)\u003c\/th\u003e\n\u003ctd\u003e15.25″ × 7.7″ × 10.75″\u003cbr\u003e385mm × 192mm × 260mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003eApproximately 56 lbs (25.4kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTerminals\u003c\/th\u003e\n\u003ctd\u003eM8 bolts included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHandles\u003c\/th\u003e\n\u003ctd\u003eDual rope carry handles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSeries Connection\u003c\/th\u003e\n\u003ctd\u003eMaximum 4S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eParallel Connection\u003c\/th\u003e\n\u003ctd\u003eMaximum 4P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Combined Configuration\u003c\/th\u003e\n\u003ctd\u003e4S4P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e5-Year Limited Warranty\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp class=\"sapphire-p\"\u003e\u003cem\u003eSpecifications are provided for general reference and may be updated as components or production revisions change. Always confirm critical dimensions, charging settings, temperature limits and installation requirements before completing a system design.\u003c\/em\u003e\u003c\/p\u003e\n\u003c!-- FAQ --\u003e\n\u003ch3 class=\"sapphire-section-title\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003chr class=\"sapphire-hr\"\u003e\n\u003cdiv class=\"sapphire-faq\"\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eHow does the self-heating system work?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eThe battery monitors its internal cell temperature while a charging source is available. If charging is attempted when the cells are too cold, the battery activates its internal heating system instead of immediately allowing the cells to charge.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eOnce the battery reaches a safe temperature, the BMS releases the low-temperature charging protection and normal charging begins automatically.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eCan it be charged below freezing?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eYes. The automatic heating system is designed to warm the cells before charging begins. Heating activates at approximately 0°C during charging, with normal cell charging released at approximately +5°C.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eThe time required depends on the battery temperature, available charging power, insulation and surrounding conditions. Very low temperatures may require a longer heating period.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eCan it provide power below freezing?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eYes. LiFePO₄ batteries can normally discharge at temperatures below 0°C even though the cells must not be charged while frozen.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eAvailable capacity and power may be reduced at very low temperatures. Installing the battery in a dry, insulated and protected compartment will improve cold-weather performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eWhat is the advantage of the 250A BMS?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eThe 250A BMS allows the battery to operate larger loads without reaching its current limit as quickly as a conventional 100A, 150A or 200A battery.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eIt also provides additional operating headroom for inverter startup surges and equipment with changing current demand. The upgraded internal wiring supports the higher continuous-current capability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eCan this battery power a 3000W inverter?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eIt may operate a 3000W inverter at partial output, but a single battery should not automatically be assumed capable of supplying a continuous 3000W AC load.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eA 3000W inverter may draw more than 250A when battery voltage, conversion losses and idle consumption are included. Its startup surge may be substantially higher. Check the inverter’s maximum DC input current and surge requirements before designing the system.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eFor help matching your battery and inverter, visit our \u003ca href=\"https:\/\/sapphirebattery.ca\/pages\/contact\" class=\"sapphire-cta\" rel=\"noopener\" target=\"_blank\"\u003eContact Us\u003c\/a\u003e page.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eDoes the higher BMS rating increase runtime?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eNo. Runtime is determined mainly by the battery’s 300Ah capacity and 3840Wh of stored energy. The 250A BMS increases how much current the battery can deliver at one time, but it does not add more stored energy.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eThe main benefits are support for larger loads, greater surge headroom and less likelihood of reaching the BMS current limit during demanding operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eDoes it include Bluetooth monitoring?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eYes. The integrated Bluetooth BMS communicates with a compatible mobile app and provides access to state of charge, voltage, current, cell voltages, temperatures, balancing status and active protection conditions.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eBluetooth monitoring is particularly useful for observing charging performance and checking battery temperature during cold-weather operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eCan I connect multiple batteries together?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eYes. Up to four matching batteries may be connected in series, and up to four may be connected in parallel. Properly designed combined configurations of up to 4S4P are permitted.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eAll batteries in the bank should be the same model, age, capacity and state of charge. Each battery should be fully charged and checked individually before making the final connections.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eParallel installations should use balanced cable routing so the batteries share charge and load current as evenly as possible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eCan I mix it with the 200A non-heating model?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eNo. Although the batteries have the same nominal voltage and capacity, their BMS ratings, internal wiring and cold-weather behaviour are different.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eFor predictable current sharing and protection, use matching 250A self-heating batteries throughout the battery bank.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eCan it be charged from solar panels?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eYes. It can be charged using a lithium-compatible MPPT or PWM solar charge controller. An MPPT controller is generally preferred for larger arrays because it provides greater design flexibility and more efficient energy harvesting.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eThe controller must be configured for LiFePO₄ batteries, and its combined output must remain within the battery’s 100A maximum charging limit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eCan it be charged from a vehicle alternator?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eYes, but a suitable DC-to-DC charger is normally recommended. A large LiFePO₄ battery can draw substantial current from an alternator when its state of charge is low.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eA DC-to-DC charger limits current, supplies a suitable lithium charging profile and helps protect the alternator and vehicle wiring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eCan I use my existing lead-acid charger?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eA dedicated or programmable LiFePO₄ charger is strongly preferred. Any charger used must remain within the battery’s permitted voltage and current limits and must not use lead-acid equalization or desulfation pulses.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eA suitable lithium charging profile provides more predictable charging and allows the battery’s cold-weather protection and heating functions to operate correctly.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eWhat size battery cables should I use?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eCable size depends on maximum current, cable length, installation method, allowable voltage drop, insulation rating and applicable electrical standards. A circuit approaching 250A requires very substantial cable, busbars and terminal hardware.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eCable size should be calculated for the actual installation rather than selected only from the BMS rating. Keep high-current cable runs as short as practical and use properly crimped, high-quality cable lugs.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eFor assistance selecting suitable cable and protection, visit our \u003ca href=\"https:\/\/sapphirebattery.ca\/pages\/contact\" class=\"sapphire-cta\" rel=\"noopener\" target=\"_blank\"\u003eContact Us\u003c\/a\u003e page.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eDoes the BMS replace a fuse or circuit breaker?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eNo. The internal BMS protects the battery cells and may disconnect the battery during an abnormal condition, but it does not replace properly sized external over-current protection.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eA suitable fuse or DC-rated circuit breaker should be installed close to the positive battery terminal. Its rating must protect the installed cable and connected equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eCan it be installed inside an RV, cabin or boat?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eYes. LiFePO₄ batteries do not normally release hydrogen gas during charging and do not require watering or other routine maintenance associated with flooded lead-acid batteries.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eThe battery should still be secured in a dry location protected from physical damage, conductive debris, excessive heat and standing water. Adequate working space should be provided around the terminals, cables and protective devices.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails class=\"sapphire-faq-item\"\u003e\n\u003csummary\u003eWhat warranty does this battery include?\u003c\/summary\u003e\n\u003cdiv class=\"sapphire-faq-body\"\u003e\n\u003cp class=\"sapphire-p\"\u003eThis battery includes a \u003cstrong\u003e5-Year Limited Warranty\u003c\/strong\u003e covering qualifying defects in materials and workmanship under normal operating conditions.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eCorrect charging equipment, suitable wiring, external over-current protection, secure mounting and operation within the stated electrical and temperature limits are important for safe performance and warranty coverage.\u003c\/p\u003e\n\u003cp class=\"sapphire-p\"\u003eQuestions about compatibility with an inverter, charger, trolling motor or solar system can be submitted through our \u003ca href=\"https:\/\/sapphirebattery.ca\/pages\/contact\" class=\"sapphire-cta\" rel=\"noopener\" target=\"_blank\"\u003eContact Us\u003c\/a\u003e page.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sapphire Energy","offers":[{"title":"Default Title","offer_id":55076326670655,"sku":null,"price":1049.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0914\/6803\/8463\/files\/12V300BT_white_bg_1600px_1.webp?v=1751751126","url":"https:\/\/sapphirebattery.ca\/products\/12v-300ah-self-heating-lifepo4-battery-250a-bluetooth","provider":"Sapphire Energy","version":"1.0","type":"link"}