Renogy Pro 12V 135Ah Underseat Smart Lithium Battery

Short Product Summary

The Renogy Pro 12V 135Ah Underseat Smart Lithium Battery packs 1,728 Wh of LiFePO4 capacity into a DIN-type underseat case designed to drop into the factory battery location in a motorhome or van conversion. It has built-in Bluetooth, a self-heating element for cold-weather charging, and a 60-feature BMS with active cell balancing.

Why This Product

The hardest part of a lithium upgrade in a motorhome is usually not the battery, it is finding somewhere to put it. This one is built specifically for the underseat DIN battery box that most European-built motorhomes already have, so a straight swap becomes realistic instead of a rebuild. You get more than four times the usable energy of a comparable lead-acid battery in the same space, at roughly half the weight, plus proper visibility of what it is doing through the app.

Key Features

• 135 Ah / 1,728 Wh capacity – substantial usable energy from a single underseat battery.
• DIN-type underseat form factor – designed to fit the factory battery location in many motorhomes and van conversions.
• Over 4,000 cycles – at 80% depth of discharge, so years of genuine touring service.
• Built-in self-heating – charges safely in freezing conditions, with an operating range down to -20 °C.
• Integrated Bluetooth – live state of charge, current and health on your phone through the Renogy app.
• Advanced BMS with active cell balancing – 60 built-in safety features covering over- and under-charge, short circuit and thermal protection.
• Roughly half the weight of lead-acid – 14.5 kg for capacity that would otherwise cost you far more payload.
• LiFePO4 chemistry – the safest and most stable lithium chemistry for leisure use.

Ideal For

• Motorhomes and van conversions with a factory underseat DIN battery box.
• Upgrading from lead-acid or AGM without rebuilding the battery compartment.
• Off-grid touring where payload and space are both tight.
• Systems running a compressor fridge, lighting, water pump and an inverter.
• Anyone touring high-altitude or winter routes where charging in the cold matters.

Local Support from 4Matt Campers

4Matt Campers is a Renogy dealer in Cape Town, supporting customers across the Western Cape and delivering throughout South Africa. We can confirm whether this battery fits your vehicle's underseat compartment, advise on the charging changes a lithium upgrade needs, and pair it with the right DC-DC charger and solar. Bring your vehicle to the showroom or send us photos and measurements of the battery box.

Technical Specifications

• Model: RBT12135LFP-SHBT
• SKU: RBT12135LFP-SHBT-G1-SA
• Nominal voltage: 12.8 V
• Rated capacity: 135 Ah (0.5C, 25 °C)
• Total energy: 1,728 Wh
• Cell chemistry: Lithium Iron Phosphate (LiFePO4)
• Cycle life: over 4,000 cycles at 80% depth of discharge
• Self-heating: yes, integrated heating element for charging below freezing
• Operating range: down to -20 °C
• Monitoring: built-in Bluetooth with the Renogy app
• BMS: active cell balancing with 60 built-in safety features
• Dimensions: 355 × 177 × 190 mm
• Weight: 14.5 kg
• Form factor: DIN-type underseat

What's Included

• 1 × Renogy Pro 12V 135Ah underseat smart lithium battery
• 1 × user manual

Optional Fitment & Upgrade Notes

• Measure your underseat battery compartment against 355 × 177 × 190 mm before ordering; we are happy to check this with you.
• A lithium upgrade usually means revisiting your charging: alternator charging should go through a DC-DC charger, and mains chargers need a lithium profile.
• The self-heating function is what makes cold-weather charging safe. Do not attempt to fast-charge any lithium battery below freezing without it.
• Pair with a shunt or battery monitor if you want precise state-of-charge alongside the Bluetooth readout.
• Ask us about combining two of these for a larger bank if your compartment allows.

Complete Your Setup

• Inverters & Inverter Chargers – turn this bank into 230 V mains power.
• Solar Charge Controllers – MPPT regulators with lithium charge profiles.
• Solar Panels – rigid, flexible and portable panels.
• 12V Electrical Accessories – DC-DC chargers, cable, fusing and monitors.
• Renogy Range – the full Renogy line-up at 4Matt Campers.

FAQ

Will it fit my motorhome?
It is built to the DIN-type underseat format used by many European motorhomes, at 355 × 177 × 190 mm. Measure your compartment or send us photos and we will confirm before you order.

What does self-heating actually do?
Lithium batteries must not be charged below freezing. The integrated heater warms the cells first, so charging happens safely in cold conditions down to -20 °C.

How long will it last?
Over 4,000 cycles at 80% depth of discharge. For typical touring use that is many years of service.

Can I just swap it for my old lead-acid battery?
Physically it is designed to, but the charging side usually needs attention: a DC-DC charger for alternator charging and a lithium profile on your mains charger. Talk to us first.

Do I need a separate Bluetooth module?
No, Bluetooth is built in and works directly with the Renogy app.