Will this drain my starting battery?

No! We recommend installing a battery isolator to protect your starting battery. The AC runs on your house batteries.

How long does it run on batteries?

With a 400 Ah battery bank, expect 6-10 hours of runtime depending on ambient temperature.

Can I install this myself?

Yes! If you're comfortable with basic electrical work and power tools, DIY installation takes 4-6 hours.

Does this work with solar panels?

Absolutely! We recommend 400-800W of solar panels for optimal off-grid performance.

B-COOL6RM | 12V & 24V DC Powered Roof Mount Air Conditioner

Name: B-COOL6RM | 12V & 24V DC Powered Roof Mount Air Conditioner
Brand: B-COOL AIR CONDITIONERS
SKU: BC-6RM
Price: 1.00 CAD
Availability: InStock

Contact Us to Request Pricing

The B-COOL 6RM is a 12V and 24V DC-powered rooftop no-idle air conditioner that runs at just 38 dB — making it one of the quietest aftermarket DC air conditioners available for trucks, RVs, sleeper cabs, and heavy equipment. It draws less power than any other rooftop unit in the B-COOL lineup, making it the go-to choice when battery runtime, energy efficiency, and quiet operation are the priorities.

No engine idling. No shore power. No generator. The 6RM runs entirely off your 12V or 24V DC battery system — keeping operators cool, comfortable, and compliant with anti-idling regulations without burning a drop of fuel.

At 60 lbs with a 29.2 x 27.8 in footprint, the 6RM is a full-size rooftop unit built for professional applications. It comes pre-charged and ready to install — cut the roof opening, bolt it down, connect to your battery, and go.

📄 Download Full 6RM Spec Sheet

Specification	12V	24V
Current Draw (Min – Max)	30 – 60A	8 – 33A
Max Energy Consumption (W/h)	360 – 720	192 – 792
Evaporator Airflow	310 m³/h	310 m³/h
Noise Level	38 dB	38 dB
Refrigerant	R134a, 300g ±10g	R134a, 300g ±10g
High Pressure	145 – 188 psi	145 – 188 psi
Low Pressure	29 – 43 psi	29 – 43 psi
Roof Cut Size	13.78 x 7.87 in	13.78 x 7.87 in
Unit Weight	60 lbs	60 lbs
Exterior Dimensions	29.2 x 27.8 x 6.6 in	29.2 x 27.8 x 6.6 in
Interior Unit Dimensions	14.7 x 10.2 x 2.8 in	14.7 x 10.2 x 2.8 in
Standard Power Cable	6m (20ft)	6m (20ft)
Optional Power Cable	10.5m (35ft), sold separately	10.5m (35ft), sold separately

B-COOL 6RM Rooftop Air Conditioning Unit (pre-charged, ready to install)
Remote Control
Rubber Gasket
Support Brace x1
Decorative Panel (optional interior finish)
Install Screws & Hardware Kit
Standard Power Cable — 6m (20ft)

Unit comes pre-charged with R134a refrigerant. No vacuum pump or refrigerant equipment needed for installation.

Optional: 10.5m (35ft) power cable available separately from our Parts Department.

📄 Download Full 6RM Installation Manual
https://cdn.shopify.com/s/files/1/0715/1140/8684/files/1._6RM_-_INSTALLATION_MANUAL_-_2026_-_FINAL.pdf?v=1772664409

The 6RM is a self-contained rooftop unit — compressor, condenser, and evaporator all housed in one unit that mounts on top of the vehicle. No refrigerant lines to run. No separate condenser to mount. The unit ships pre-charged with R134a and is ready to run straight out of the box.

Professional installation required.

Step 1 — Cut the roof opening
Cut a 13.78 x 7.87 in (35 x 20 cm) rectangular opening in the roof. Measure twice before cutting.

Step 2 — Prepare the mounting surface
Apply the rubber gasket and sealant around the opening to create a weatherproof seal.

Step 3 — Set the support bolts
Adjust the support bolts to the correct height for your specific roof thickness before setting the unit.

Step 4 — Mount the unit
Set the 6RM onto the roof opening and secure it with the included support brace.

Step 5 — Connect the control panel wiring
Run the control panel wiring through the roof and connect to the interior control panel.

Step 6 — Connect power
Run the power cable to your 12V or 24V battery bank. Connect positive first. The standard cable is 6m (20ft). An optional 10.5m (35ft) cable is available from our Parts Department if needed.

Step 7 — Set low voltage protection
Before first use, program the voltage cutoff to protect your battery system:

12V systems: set cutoff between 9V – 12V
24V systems: set cutoff between 19V – 24V

Step 8 — Finish interior
Install the optional decorative panel on the interior ceiling for a clean finish.

Step 9 — Power on
Turn the unit on and verify operation.

📄 Download Full 6RM Operating Manual
https://cdn.shopify.com/s/files/1/0715/1140/8684/files/2._6RM_-_OPERATING_MANUAL_-_2026_-_FINAL.pdf?v=1772664409

Inside Control Panel — 4 Buttons

Button A: Power on / off
Button B: Mode — cycles through Low / Medium / High / Powerful fixed-frequency cooling
Button C (▲): Increase airflow level
Button D (▼): Decrease temperature / adjust settings

Remote Control

Power on / off. Temperature range: 60.8°F – 89.6°F.

Cooling modes:

High — default 60.8°F, Level 6 airflow
Medium — default 78.8°F, Level 4 airflow
Low — default 82.4°F, Level 3 airflow
Auto — default 78.8°F, Level 4 airflow
Fresh Air — fan only, compressor off. Circulates and ventilates without active cooling. Useful for mild days or when you want airflow without drawing full power.

Airflow: 6 adjustable levels via remote or control panel.

Display button: turns the interior cab display on or off — useful at night in a sleeper cab or RV.

Auto-Swing Louver Motor

The 6RM features a motorized louver that automatically sweeps airflow back and forth across the cab — ensuring even cooling throughout the space rather than a fixed directional blast.

Low Voltage Protection

The 6RM includes programmable voltage cutoff to protect your battery system from deep discharge.

12V systems: set cutoff between 9V – 12V
24V systems: set cutoff between 19V – 24V

When battery voltage drops to the cutoff threshold the unit shuts off automatically to prevent battery damage.

The 6RM is the right unit if:

You drive a semi truck, sleeper cab, or long haul truck and need a no-idle AC solution that complies with anti-idling regulations and stretches your auxiliary battery as far as possible
You have an RV, motorhome, or camper and want near-silent overnight cooling — 38 dB is barely above a whisper
You operate heavy equipment on job sites where noise levels matter — mining operations, urban construction, early morning starts
You need an aftermarket rooftop air conditioner to replace a failed OEM system on a truck or piece of equipment
You're running a solar-powered off-grid build and every amp matters — the 6RM's lower draw gives you more runtime per kilowatt-hour than any other B-COOL rooftop unit
Your priority is energy efficiency and quiet operation over maximum airflow

The 6RM delivers 310 m³/h airflow. If maximum airflow is your priority, consider the 9RM, 12RM Dual Fan, or YTRM. But if quiet, efficient, long-runtime cooling is what you need, the 6RM is the best rooftop option we make for that job.

Applications

Trucking & Transportation — semi trucks, sleeper cabs, long haul trucks, day cabs, tanker trucks, flatbed trucks, log carriers, livestock trucks — particularly for anti-idling compliance and overnight rest

Recreation & Off-Grid — RVs, motorhomes, camper vans, conversion vans, travel trailers, fifth wheels, truck campers — particularly for quiet overnight use and solar-powered builds

Heavy Equipment — excavators, bulldozers, wheel loaders, cranes, mining equipment, urban construction equipment — particularly where noise reduction on the job site matters

Agriculture — tractors, harvesters, sprayers, balers — long days in the field where energy efficiency and quiet operation reduce operator fatigue

Emergency Services & Military — command vehicles, surveillance vehicles, response units where quiet operation is operationally important

Does the 6RM work on both 12V and 24V systems?
Yes. The 6RM is available in both 12V and 24V configurations. Select your voltage when ordering. The unit is wired for one voltage — it is not a dual-voltage unit.

How quiet is 38 dB really?
38 dB is roughly equivalent to a quiet library or a soft whisper at close range. It is significantly quieter than a normal conversation (60 dB) and dramatically quieter than the B-COOL 5RM rooftop unit (68 dB). For overnight use in a sleeper cab or RV, 38 dB is barely noticeable.

Does it come pre-charged?
Yes. The 6RM ships pre-charged with R134a refrigerant and is ready to install. No vacuum pump or refrigerant equipment needed.

What size hole do I need to cut?
13.78 x 7.87 inches (35 x 20 cm). Measure twice before cutting.

Is this unit compliant with anti-idling regulations?
The 6RM runs entirely on DC battery power with no engine idling required, making it fully compatible with anti-idling laws and idle reduction programs across North America.

How does the 6RM compare to the 9RM?
Both run at 38 dB. The 9RM is larger and heavier (77 lbs, 30.4 x 38.2 in footprint) with higher airflow (350 m³/h) and is designed for larger cab spaces. The 6RM is smaller (60 lbs, 29.2 x 27.8 in), draws less power, and is better suited for smaller to mid-size cabs where efficiency matters most.

What battery bank do I need?
At 12V, the 6RM draws between 30 and 60 amps. For overnight use in a sleeper cab or off-grid build, contact our technical support team to size your battery system correctly for your runtime requirements.

Is a longer power cable available?
Yes. A 10.5m (35ft) optional power cable is available separately from our Parts Department.

What if I need replacement parts?
All 6RM components are stocked with dedicated part numbers. Contact our Parts Department at adrian@dcpowersales.com or 778-679-4999.

When you buy from B-COOL, you're not buying from an Amazon storefront with no support. You're buying from the team that wrote the installation manual, stocks the replacement parts, and answers the phone.

Sales & Inquiries
📧 sales@dcpowersales.com
📞 778-590-5000

Technical Support
📧 adrian@dcpowersales.com
📞 778-679-4999

Parts Available in Canada & United States. We stock all parts - compressor, control board, condenser fan assembly, evaporator, blower motor, louver motor, all hoses, hardware and more.

Every other brand lists BTU numbers. We don't, and here's why.

BTU ratings in the 12V and 24V air conditioner market are tested in controlled lab conditions and competitors go with their favourite testing company and tend to use those results that depicts them the "best". Real-world performance — inside a truck cab or RV sitting in the sun at 100°F+ — is a completely different story. The numbers you see on competitor listings are inflated, and we are not willing to publish figures that mislead the people who depend on this equipment to stay safe and productive.

Lower amp draw means longer battery runtime. For operators running on batteries overnight, during rest breaks, or in anti-idling zones, the 6RM stretches your power further than any other rooftop option in our lineup.

Compare All B-COOL Models

Model	Noise	Weight	Airflow	12V Amps	24V Amps	Special Features	Availability
5RM	68 dB	40 lbs	400 m³/h	40 – 75A	11 – 40A	Lightest rooftop, simplest install	Available to Purchase Online
X7RM	68 dB	48 lbs	400 m³/h	40 – 75A	11 – 40A	Cooling + PTC heating (4-season)	Pricing Upon Request
6RM	38 dB	60 lbs	310 m³/h	30 – 60A	8 – 33A	Quietest small rooftop, lowest amp draw, auto-swing louver	Pricing Upon Request
9RM	38 dB	77 lbs	350 m³/h	30 – 70A	8 – 38A	Capillary tube, large cab coverage	Pricing Upon Request
12RV	28 dB	77 lbs	350 m³/h	30 – 70A	8 – 38A	Quietest unit overall, RV square cut, internal filters	Pricing Upon Request
12RM Dual Fan	48 dB	99 lbs	400 m³/h	35 – 85A	10 – 45A	Dual fan, most modes, Hybrid Control Panel optional	Pricing Upon Request
YTRM	48 dB	99 lbs	460 m³/h	35 – 85A	10 – 45A	Highest airflow, yard truck built, ignition cut-off	Pricing Upon Request
FLEX ST	48 dB	53 lbs	350 m³/h	35 – 65A	10 – 35A	Flexible hose routing, split system	Available to Purchase Online
FLEX QC	48 dB	53 lbs	350 m³/h	35 – 65A	10 – 35A	Quick Connect, split system, 100A fuse included	Pricing Upon Request
WMB ST	48 dB	44 lbs	350 m³/h	35 – 65A	10 – 35A	Wall/side mount, no roof cut needed	Available to Purchase Online
WMB QC	48 dB	44 lbs	350 m³/h	35 – 65A	10 – 35A	Quick Connect, wall/side mount, 100A fuse included	Pricing Upon Request