Rolls VB12-135LFP-RV 12V 135Ah LiFePO4 Battery

  
By Rolls Battery
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Rolls VB12-135LFP-RV 12V 135Ah LiFePO₄ Battery

Key benefits

  • 12V 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.
  • Long 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.
  • Integrated hardware BMS and Bluetooth connectivity with a dedicated iOS and Android app for simple monitoring and protection.

Brief description

The 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.

Key features

  • 12.8V nominal, 135Ah rated capacity and 1.73kWh total energy in a compact Group 31 footprint.
  • Standard‑size BCI ABS container with rope/plastic handles and M8 terminals for easy retrofit in place of VRLA batteries.
  • Wide operating temperature range with charge from 0°C to 55°C and discharge from ‑20°C to 60°C.
  • Integrated BMS (4S150A) providing independent charge and discharge protection, including over‑voltage, low‑voltage, over‑current, short‑circuit and temperature protections.
  • Configurable in series and parallel up to 4S4P (48V systems) or 1S6P (12V systems) for scalable storage banks.

Technical specifications

General

Series R‑SERIES LFP
Warranty See Warranty Terms
Volts 12
Design Grp 31
Terminal Type M8
Included Hardware M8 stainless bolts & washers

Charge / Discharge

Charge Voltage Range 14.0 - 14.6V
Recommended End of Discharge Voltage 12.0 V
End of Discharge Protection Voltage 10.0 V
Recommended Charge Voltage 14.4 V
Recommended Charge Current 0~10°C (32‑50°F) 0.2C 40A
Recommended Charge Current 10~35°C (50‑95°F) 0.5C 100A
Recommended Charge Current 35~50°C (95‑122°F) 0.2C 40A
Charge mode notes Charge at recommend voltage & current by temperature until charge current drops to ≤ 0.05C (CC,CV); DO NOT USE TEMPERATURE COMPENSATION; No BTS (Battery Temperature Sensor)
Max Continuous Charge Current 67 A
Max Continuous Discharge Current 135 A
Surge Current Limit 800 A (300ms)
Charge Temperature Range 0°C~55°C 
Discharge Temperature Range -20°~60°C 
Storage Temperature Range -5°~45°C 

Capacity

Nominal Capacity 135 AH
Total Energy 1.73 kWh
Nominal Voltage 12.8 V

Safety

Cell type Cylindrical LiFePO4 cells (UL1642)
Standards IEC62133 (cell), IEC62619(cell), UN38.3 (cell/pack)
Certifications ROHS (cell), CE system certification, IP65 Rating

Design

Container ABS
Cover ABS
Handles Rope / Plastic Handle
Design features Standard-size (BCI) ABS container for easy VRLA replacement; Fast charge/discharge performance; Maintenance-free operation; Bluetooth Connectivity & dedicated IOS & Android App

Battery Management System (BMS)

Type Integrated hardware BMS inside
Internal BMS Model 4S150A
Protection topology Independent charge & discharge protection
Protection functions Short-Circuit Protection, Over-Voltage Protection, Low-Voltage Protection, Over-Current Protection, Low-Temperature Protection, Over-Temperature Protection

12V LFP profile – mechanical

Weight 15 kg / 33 lbs
Length 330 mm / 13"
Width 173 mm / 6.81"
Height 216 mm / 8.5"
Height Incl. Term. 219 mm / 8.62"
Measurement note Product measurements & weights are calculated based on sample data. Individual specifications are subject to vary due to the manufacturing process & battery components.

Operational limits and configuration

Expected Cycle Life >6000 @ 80% DOD, >3000 @ 100% DOD
Series Connection 4 UNITS MAX (48V)
Parallel Connection 4 UNITS MAX (48V) or 6 UNITS MAX (12V)
Connectivity Up to 4S4P (in 48V configuration) or 1S6P (in 12V configuration)
Revision Rev.#1 | May 2023

Shipping

Shipping is available to the UK, Ireland, Africa, the Caribbean and worldwide. If the shipping rate is not shown at checkout, please contact us on +44 2080640335 or info@energian.co.uk for a tailored shipping quote.

UK expert support

UK 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.

You 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.

Documents available for download