{"product_id":"rolls-vb12-135lfp-rv-12v-135ah-lifepo4-battery","title":"Rolls VB12-135LFP-RV 12V 135Ah LiFePO4 Battery","description":"\u003cdiv style=\"font-size: 18px; line-height: 1.6;\"\u003e\n\u003c!-- A. Product Title \/ Heading --\u003e\n\u003ch1 style=\"text-align: center;\"\u003eRolls VB12-135LFP-RV 12V 135Ah LiFePO₄ Battery\u003c\/h1\u003e\n\u003c!-- B. Key value proposition --\u003e\n\u003ch2\u003eKey benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e12V 135Ah LiFePO₄ battery in a standard Group 31 case, ideal as a drop‑in upgrade for deep‑cycle lead‑acid batteries in RV, marine and off‑grid systems.\u003c\/li\u003e\n\u003cli\u003eLong service life with more than 6000 cycles at 80% depth of discharge and over 3000 cycles at 100% DOD, reducing replacement frequency and whole‑life cost.\u003c\/li\u003e\n\u003cli\u003eIntegrated hardware BMS and Bluetooth connectivity with a dedicated iOS and Android app for simple monitoring and protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- C. Brief Description --\u003e\n\u003ch2\u003eBrief description\u003c\/h2\u003e\n\u003cp\u003eThe Rolls VB12-135LFP-RV 12V 135Ah LiFePO₄ Battery is part of the R‑Series LFP range, built around cylindrical LiFePO₄ cells in a robust ABS Group 31 enclosure. With 1.73kWh of energy, high discharge capability and fast‑charge performance, it suits campervans, motorhomes, boats, small off‑grid cabins and commercial service vehicles needing reliable 12V storage. A built‑in BMS manages protection functions while Bluetooth connectivity allows you to keep track of state of charge and operating conditions from your phone or tablet.\u003c\/p\u003e\n\u003c!-- D. Key features --\u003e\n\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e12.8V nominal, 135Ah rated capacity and 1.73kWh total energy in a compact Group 31 footprint.\u003c\/li\u003e\n\u003cli\u003eStandard‑size BCI ABS container with rope\/plastic handles and M8 terminals for easy retrofit in place of VRLA batteries.\u003c\/li\u003e\n\u003cli\u003eWide operating temperature range with charge from 0°C to 55°C and discharge from ‑20°C to 60°C.\u003c\/li\u003e\n\u003cli\u003eIntegrated BMS (4S150A) providing independent charge and discharge protection, including over‑voltage, low‑voltage, over‑current, short‑circuit and temperature protections.\u003c\/li\u003e\n\u003cli\u003eConfigurable in series and parallel up to 4S4P (48V systems) or 1S6P (12V systems) for scalable storage banks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- E. Technical specifications – all strings from the datasheet --\u003e\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ch3\u003eGeneral\u003c\/h3\u003e\n\u003ctable style=\"width: 100.087%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.3961%;\"\u003eSeries\u003c\/td\u003e\n\u003ctd style=\"width: 36.1228%;\"\u003eR‑SERIES LFP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.3961%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"width: 36.1228%;\"\u003eSee Warranty Terms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.3961%;\"\u003eVolts\u003c\/td\u003e\n\u003ctd style=\"width: 36.1228%;\"\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.3961%;\"\u003eDesign\u003c\/td\u003e\n\u003ctd style=\"width: 36.1228%;\"\u003eGrp 31\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.3961%;\"\u003eTerminal Type\u003c\/td\u003e\n\u003ctd style=\"width: 36.1228%;\"\u003eM8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.3961%;\"\u003eIncluded Hardware\u003c\/td\u003e\n\u003ctd style=\"width: 36.1228%;\"\u003eM8 stainless bolts \u0026amp; washers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCharge \/ Discharge\u003c\/h3\u003e\n\u003ctable style=\"width: 100.087%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eCharge Voltage Range\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e14.0 - 14.6V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eRecommended End of Discharge Voltage\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e12.0 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eEnd of Discharge Protection Voltage\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e10.0 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eRecommended Charge Voltage\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e14.4 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eRecommended Charge Current 0~10°C (32‑50°F)\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e0.2C 40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eRecommended Charge Current 10~35°C (50‑95°F)\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e0.5C 100A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eRecommended Charge Current 35~50°C (95‑122°F)\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e0.2C 40A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eCharge mode notes\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003eCharge at recommend voltage \u0026amp; current by temperature until charge current drops to ≤ 0.05C (CC,CV); DO NOT USE TEMPERATURE COMPENSATION; No BTS (Battery Temperature Sensor)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eMax Continuous Charge Current\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e67 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eMax Continuous Discharge Current\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e135 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eSurge Current Limit\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e800 A (300ms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eCharge Temperature Range\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e0°C~55°C \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eDischarge Temperature Range\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e-20°~60°C \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 63.9909%;\"\u003eStorage Temperature Range\u003c\/td\u003e\n\u003ctd style=\"width: 35.7467%;\"\u003e-5°~45°C \u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eCapacity\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd\u003e135 AH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Energy\u003c\/td\u003e\n\u003ctd\u003e1.73 kWh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e12.8 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCell type\u003c\/td\u003e\n\u003ctd\u003eCylindrical LiFePO4 cells (UL1642)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eIEC62133 (cell), IEC62619(cell), UN38.3 (cell\/pack)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eROHS (cell), CE system certification, IP65 Rating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eDesign\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eContainer\u003c\/td\u003e\n\u003ctd\u003eABS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCover\u003c\/td\u003e\n\u003ctd\u003eABS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHandles\u003c\/td\u003e\n\u003ctd\u003eRope \/ Plastic Handle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDesign features\u003c\/td\u003e\n\u003ctd\u003eStandard-size (BCI) ABS container for easy VRLA replacement; Fast charge\/discharge performance; Maintenance-free operation; Bluetooth Connectivity \u0026amp; dedicated IOS \u0026amp; Android App\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eBattery Management System (BMS)\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eIntegrated hardware BMS inside\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal BMS Model\u003c\/td\u003e\n\u003ctd\u003e4S150A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection topology\u003c\/td\u003e\n\u003ctd\u003eIndependent charge \u0026amp; discharge protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection functions\u003c\/td\u003e\n\u003ctd\u003eShort-Circuit Protection, Over-Voltage Protection, Low-Voltage Protection, Over-Current Protection, Low-Temperature Protection, Over-Temperature Protection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e12V LFP profile – mechanical\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e15 kg \/ 33 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e330 mm \/ 13\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e173 mm \/ 6.81\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e216 mm \/ 8.5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight Incl. Term.\u003c\/td\u003e\n\u003ctd\u003e219 mm \/ 8.62\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMeasurement note\u003c\/td\u003e\n\u003ctd\u003eProduct measurements \u0026amp; weights are calculated based on sample data. Individual specifications are subject to vary due to the manufacturing process \u0026amp; battery components.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eOperational limits and configuration\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eExpected Cycle Life\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;6000 @ 80% DOD, \u0026gt;3000 @ 100% DOD\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeries Connection\u003c\/td\u003e\n\u003ctd\u003e4 UNITS MAX (48V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eParallel Connection\u003c\/td\u003e\n\u003ctd\u003e4 UNITS MAX (48V) or 6 UNITS MAX (12V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectivity\u003c\/td\u003e\n\u003ctd\u003eUp to 4S4P (in 48V configuration) or 1S6P (in 12V configuration)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRevision\u003c\/td\u003e\n\u003ctd\u003eRev.#1 | May 2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c!-- F. Shipping --\u003e\n\u003ch2\u003eShipping\u003c\/h2\u003e\n\u003cp\u003eShipping is available to the UK, Ireland, Africa, the Caribbean and worldwide. If the shipping rate is not shown at checkout, please contact us on \u003ca href=\"tel:+442080640335\"\u003e+44 2080640335\u003c\/a\u003e or \u003ca href=\"mailto:info@energian.co.uk\"\u003einfo@energian.co.uk\u003c\/a\u003e for a tailored shipping quote.\u003c\/p\u003e\n\u003c!-- UK expert support --\u003e\n\u003ch2\u003eUK expert support\u003c\/h2\u003e\n\u003cp\u003eUK expert support is available to help with battery selection, sizing and configuration of the Rolls VB12-135LFP-RV 12V 135Ah LiFePO₄ Battery in RV, marine and off‑grid systems. For larger banks or installations alongside inverters, chargers and DC distribution, we recommend installation and commissioning via our trusted partners to ensure safe operation and correct protection settings.\u003c\/p\u003e\n\u003cp\u003eYou can contact us by phone, email or live chat, or visit our office for an in‑person consultation to discuss your project and preferred system layout.\u003c\/p\u003e\n\u003c!-- Documents --\u003e\n\u003ch2\u003eDocuments available for download\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0579\/7927\/3414\/files\/R12-135LFP_datasheet.pdf?v=1780994829\" rel=\"noopener\" target=\"_blank\"\u003eRolls VB12-135LFP-RV datasheet\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"color: rgb(43, 0, 255);\"\u003e\u003cspan style=\"color: rgb(43, 0, 255);\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0579\/7927\/3414\/files\/Rolls-VB-Series-LFP-Drop-In-Battery-Operating-Manual.pdf?v=1780991461\" target=\"_blank\" style=\"color: rgb(43, 0, 255);\" rel=\"noopener\"\u003eRolls R‑Series LFP installation \/ user manual\u003c\/a\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Rolls Battery","offers":[{"title":"Default Title","offer_id":57527030120830,"sku":"VB12-135LFP-RV","price":314.78,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0579\/7927\/3414\/files\/R12-135LFP-front.png?v=1780994426","url":"https:\/\/www.energian.co.uk\/products\/rolls-vb12-135lfp-rv-12v-135ah-lifepo4-battery","provider":"Energian","version":"1.0","type":"link"}