{"product_id":"deka-duration-dd300-12h-300ah-3-6kwh-12v-lifepo4-heated-monobloc-battery","title":"DEKA Duration DD300-12H 300Ah 3.6kWh 12V LiFePO4 Heated Monobloc Battery","description":"\u003ch2\u003eWhy Choose the Deka Duration DD300-12H 12V 300Ah LiFePO4 Heated Battery for Cold-Climate Energy Storage\u003c\/h2\u003e\u003cp\u003eThe Deka Duration DD300-12H is a 12V 300Ah LiFePO4 Heated Monobloc Battery built on Lithium Iron Phosphate chemistry with a fully integrated Battery Management System (BMS) and built-in self-heating capability. Rated at 300Ah with 3.6kWh of usable energy, it is engineered for high-capacity applications in cold climates that demand deep, repeated cycling — including off-grid solar storage, large RV and marine house loads, golf carts, and home backup power systems — all in a sealed, IP67-rated, fire-resistant package that charges reliably down to -4°F (-20°C).\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eDD300-12H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e12V (12.8V Nominal)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e300Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsable Energy\u003c\/td\u003e\n\u003ctd\u003e3.6kWh (3.84kWh usable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChemistry\u003c\/td\u003e\n\u003ctd\u003eLiFePO4 (Lithium Iron Phosphate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part #\u003c\/td\u003e\n\u003ctd\u003eDD300-12H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (L×W×H)\u003c\/td\u003e\n\u003ctd\u003e19.69 × 10.43 × 9.2 in (500 × 265 × 232.4 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e82.67 lbs (37.5 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIP Rating\u003c\/td\u003e\n\u003ctd\u003eIP67 (Waterproof \u0026amp; Dustproof)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCycle Life\u003c\/td\u003e\n\u003ctd\u003e6,000 cycles at 80% DoD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsable DoD\u003c\/td\u003e\n\u003ctd\u003e100%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEfficiency\u003c\/td\u003e\n\u003ctd\u003e99%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSelf-Discharge\u003c\/td\u003e\n\u003ctd\u003e3% per month\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Resistance\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;30mΩ\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuilt-in BMS\u003c\/td\u003e\n\u003ctd\u003eInternal with Smart Communication\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBuilt-in Low-Temp Heater\u003c\/td\u003e\n\u003ctd\u003eAutomatic, Activates Below 32°F (0°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParallel\/Series Config\u003c\/td\u003e\n\u003ctd\u003eUp to 16 in Parallel or 4P×4S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUS Made\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eBuilt-in Heating for Cold-Climate Charging\u003c\/h2\u003e\u003cp\u003eStandard LiFePO4 batteries cannot be safely charged below freezing — a critical limitation in cold-weather installations. The DD300-12H solves this with an integrated self-heating system that brings the cells to a safe operating temperature before and during charging, enabling full charge capability down to -4°F (-20°C). Whether installed in a northern off-grid cabin, a winter RV build, or an outdoor backup system, this battery charges reliably where standard lithium batteries would shut down or sustain cell damage.\u003c\/p\u003e\u003ch2\u003eCharging Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Charge Current\u003c\/td\u003e\n\u003ctd\u003e150A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Charge Current\u003c\/td\u003e\n\u003ctd\u003e300A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAbsorption Voltage\u003c\/td\u003e\n\u003ctd\u003e14.2–14.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFloat Voltage\u003c\/td\u003e\n\u003ctd\u003e13.6–13.8V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAbsorption Time\u003c\/td\u003e\n\u003ctd\u003e60 minutes per 100Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCharge Temperature Range\u003c\/td\u003e\n\u003ctd\u003e-4°F to 140°F (-20°C to 60°C) — with Built-in Heater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eDischarging Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended Discharge Current\u003c\/td\u003e\n\u003ctd\u003e150A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Continuous Discharge\u003c\/td\u003e\n\u003ctd\u003e300A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak\/Surge Current\u003c\/td\u003e\n\u003ctd\u003e1,000A for 5 seconds\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDischarge Temperature Range\u003c\/td\u003e\n\u003ctd\u003e-4°F to 140°F (-20°C to 60°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended LVD\u003c\/td\u003e\n\u003ctd\u003e11–11.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMS Discharge Voltage Cut-Off\u003c\/td\u003e\n\u003ctd\u003e10.6–11V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShort Circuit Protection\u003c\/td\u003e\n\u003ctd\u003e1200A \/ 500µs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eTemperature Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperational Temperature\u003c\/td\u003e\n\u003ctd\u003e-4°F to 140°F (-20°C to 60°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temperature\u003c\/td\u003e\n\u003ctd\u003e59°F to 95°F (15°C to 35°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMS High Temp Cut-Off\u003c\/td\u003e\n\u003ctd\u003e149°F (65°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eCertifications\u003c\/h2\u003e\u003cp\u003eUN38.3, UN3480 Class 9, UL 1973 Recognized Component, IEC62619, UL9540A, UL1642, CE\u003c\/p\u003e\u003ch2\u003eKey Applications\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCold-Climate Solar Energy Storage:\u003c\/strong\u003e Off-grid cabin, van build, or residential solar backup — 3.6kWh per unit, scalable up to 16 units in parallel, charges reliably at temperatures where standard lithium batteries cannot.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGolf Carts:\u003c\/strong\u003e High surge current, 100% usable DoD, and 6,000-cycle life — a direct upgrade over lead-acid in all-season environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRV House Loads:\u003c\/strong\u003e Powers lights, appliances, inverters, and electronics through all four seasons including winter camping.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMarine Applications:\u003c\/strong\u003e IP67-rated sealed construction handles moisture, vibration, and tilt common in marine environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHome Backup \u0026amp; UPS:\u003c\/strong\u003e Dependable standby power for inverter-based home battery backup systems in cold climates.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eBMS Protection Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eOvercharge protection\u003c\/li\u003e\n\u003cli\u003eOver-discharge protection\u003c\/li\u003e\n\u003cli\u003eShort circuit protection (1200A \/ 500µs)\u003c\/li\u003e\n\u003cli\u003eHigh-temperature cutoff at 149°F (65°C)\u003c\/li\u003e\n\u003cli\u003eAutomatic reconnect once safe conditions are restored\u003c\/li\u003e\n\u003cli\u003eFire-rated ABS PC casing — IP67 waterproof and dustproof\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWarranty\u003c\/h2\u003e\u003cp\u003eBacked by Deka's manufacturer warranty — \u003cstrong\u003e120 months \/ 6,000 cycles\u003c\/strong\u003e. As an Authorized Deka Distributor, Solar Cellz USA provides genuine products with full manufacturer warranty support.\u003c\/p\u003e\u003ch2\u003eDocuments\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e📄 \u003ca href=\"https:\/\/www.solarelectricsupply.com\/media\/sparsh\/product_attachment\/DD300-12H_compressed.pdf\" target=\"_blank\"\u003eDatasheet (PDF)\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e📄 \u003ca href=\"https:\/\/www.solarelectricsupply.com\/media\/sparsh\/product_attachment\/Deka_Duration_Drop_in_Lithium_IO_Manual_3-9-26.pdf_compressed.pdf\" target=\"_blank\"\u003eInstallation Manual (PDF)\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Deka","offers":[{"title":"DEKA Duration DD300-12H 300Ah 3.6kWh 12V LiFePO4 Heated Monobloc Battery","offer_id":45938931368038,"sku":"DD300-12H","price":2127.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0678\/7265\/3414\/files\/75bbc93a10a45204d485e8cf6291afb5.webp?v=1784136806","url":"https:\/\/store.solarcellzusa.com\/products\/deka-duration-dd300-12h-300ah-3-6kwh-12v-lifepo4-heated-monobloc-battery","provider":"Solar Cellz Inc","version":"1.0","type":"link"}