Solar Systems
Air Conditioning

Previously TJM Electrical & Solar, we have re-branded to Mern Industries

Providing Solar Panel, Air Conditioning and General Electrical Services For Moreton Bay

How can we help you?

We’re your on-time, electrical experts for Moreton Bay, servicing Brisbane to the Sunshine Coast. Give us a call – we guarantee our work and exceptional service.


Solar Services

Solar panel systems, solar batteries, repairs, upgrades, servicing & solar water pumps


Air Conditioning

Installations, repairs, upgrades, servicing, cleaning, removal & decommissioning



Covering all areas of Domestic, Commercial, Farming and Factories

Why choose us?

We provide exceptional, first-rate electrical services and workmanship in the Moreton Bay Region so our customers enjoy sustainable, comfortable living


We are organised and focused to ensure minimal time wastage and resources

Continuous improvement

We are committed to the ongoing improvement of our products, services, systems and knowledge

High service standards

We aspire to build a trusting and long-term relationship with you and exceed your expectations

Safe and tidy

Neat and tidy work, showing attention to detail and always complying to Australian Standards


We use high quality parts and materials purchased from reputable electrical wholesalers


We guarantee a job well done and we warranty our work for total peace of mind

Save Money On Power Bills. Get Solar.

Choose us for all your electrical needs

From full solar installations to fixing your air conditioning, give us a call when you need the professionals for your electrical jobs.


Shed wiring

Phone points

Safety switches

Mains power

Ceiling fans

Data points

Smoke alarms

Light points

Power points

LAN cabling

And much more


Got a question? Check out our frequently asked questions or contact us.

What are your business hours?

Monday to Friday: 7am to 4pm

Are you fully licensed?

Yes, below are our details:

ABN: 71 414 253 459

Electrical Contractors Licence: 73724

Solar Accreditation: A5374813

ARC: L069971

What areas do you serve?

We service the Moreton Bay Region. From Kilcoy to Bribie Island. Elimbah to Narangba. We also service North Brisbane suburbs. We will travel further for larger projects.

What air conditioners do you install?

We supply and install a wide range of split system, reverse cycle air conditioners.  We supply:

  • Mitsubishi Electric 
  • Fujitsu
  • Carrier
  • Hitachi
  • Daikin
Who will install my solar system?

We are a family owned and operated business. Tony is the business owner, the qualified electrican and the accredited solar installer. Tony designs and installs the solar systems with the help from our fully trained staff. Our jobs are not sub contracted out. Be assured that the designer of the system is also the installer.  We will arrive with signage on vehicles and uniforms.

What solar inverters and panels do you install?

We only install inverters and tier one solar panels that are approved on the Clean Energy Council website.

The inverter brands we usually install are:

  • Fronius
  • Sungrow
  • SolarEdge and 
  • Solax

The solar panels we usually install are:

  • Canadian Solar 
  • Jinko and 
  • SolarEdge

The battery systems we install are: 

  • BYD
  • Redback
  • LG Chem and 
  • Sonnen
What size solar systems are available?

We supply and install solar systems on residential, business, commercial and industrial properties. A standard residential system is a 6.6kw system, however depending on the number of power phases your property has and the amount of roof space, we can also install 10kw and 15kw systems on residential properties.

We can supply and install larger systems on commercial or industrial properties up to 30kw.  If you are looking at a larger system, please contact our office to discuss your needs and options.

What about solar systems with battery back up?

Yes, we can supply and install a solar system with battery storage. A battery storage system enables you to use your solar power at night. During the day the sun on the panels will charge the batteries ready for use at night or in case of a power outage.  We can design your solar system to include battery storage or you may choose to add this on later. Talk to us today about your options.

Are solar systems easy to maintain?

Yes. Generally they only require annual cleaning of panels, checking the inverter, checking of the racking and cabling. This ensures the system is in optimal working order. We offer an annual maintenance and safety check for a minimal cost.

What type of payment methods do you accept?

Direct Debit into bank account is preferred, Eftpos facilities available and cash. We can take a credit card payment, however, no over the phone facilities are available and there is a 1.95% surcharge.

Where is your main office?

We are based in Wamuran Queensland, 4512.

My power keeps tripping, what can I do?

The first step is to isolate the circuit that is causing the problem.  

  • Unplug all of your appliances from the sockets (don’t just turn off, unplug).
  • When everything is unplugged then try to reset the safety switch.
  • If the safety switch resets and power is then restored, one by one, start to plug your appliances back in.
  • The faulty appliance will trip the safety switch again.

Remember to check grey water pumps, power boards and outdoor power points. 

Some outdoor power points can get wet or have a pest infestation that can cause the issue. If you still cannot rectify the situation, then give us a call.

Do you replace old air conditioners?

Yes. We can decommission the old unit, retrieve the gas and dispose of the old unit using good environmental practices and install a new air conditioner unit for you.

Do the solar systems have a warranty?

Yes. The inverters we use have a minimum of 5 years warranty. You can register the inverter online for more warranty. The panels have a 25 year linear power output warranty and a 12 year enhanced product warranty on materials and workmanship.

We guarantee our installation is to current Australian Standards and is of the highest quality workmanship.

You can be assured that any materials or products supplied to you are of a quality standard. We only supply and recommend reputable products from Electrical Wholesalers.

How much electricity will my solar system produce?

It depends on the size of the system.  Generally our solar systems generate approx 4.5kw hours per kilowatt of panels per day. eg: A 6.6kw system will generate on average 29.7kwh per day.

Can I add more panels to my system later?

Yes, as long as the system does not go over the approved size from Energex / Ergon. You may choose to install a small system and gradually build your system up over time to the maximum approved size. 

Should I add my solar system to my house insurance?

Yes. We recommend you contact your insurer once the solar system is installed and add it to your insurance.

What Our Customers Say

Air conditioning

Tony and team did an excellent job installing 2 x AC units especially at short notice. Very much appreciated them making the time to fit my job in. Thankyou.

Marilyn Brown


Great job. Really easy to work with. Very neat job.

Paul Willis


I have been using Mern Industries for over 10 years and couldn’t recommend them highly enough

Marty Rutter

Martin Rutter Builder


The team was prompt and efficient and kept me informed before and during job. Will definitely use you again.

Ania Johnston


Excellent service, nice people to deal with, and very capable electricians. Will definitely use again.

Fred Bell


Awesome service and everyone conducted them selves with great professionalism. Thanks again.

Steve Lewis


Always great service that is why I keep getting you back.

Jenny & Graham Cruise


Always give great service, best advice, very professional and friendly , prompt in attending faults. Easy to organize payment, thanks team

Brad Davis

Solar & Air conditioning

Excellent service. All questions were answered. Very happy with the installation of my solar and air conditioning.

Joyce Patterson

Air conditioning

Professional and quality install for a split AC system and a wall light. Our go too electricians, don’t look anywhere else.

Daniel Lynskey