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

IMG 2264 Home

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: L150117

QBCC: 15289763

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 and ducted air conditioners.  

We supply:

  • Hitachi
  • Panasonic
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.

We supply and recommend Fronius inverter, these include:

  • FroniusPrimo
  • Fronius Symo
  • Fronius Eco
  • Fronius Gen 24

The solar panels we usually install are:

  • Longi
  • Jinko
  • Canadian Solar

The battery systems we install are:

  • BYD
  • LG Chem
  • Redback
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


Very friendly and professional. No issue was an issue! I had a few questions and Tony listened and gave a resolution straight away. Provided honest genuine feedback. After getting screwed over by another company it was a relief to have these guys at my home. I’m kicking myself for not using them in the first place. Which is why they’re back to do more work for me. Excellent quality and value. Refreshing really!

Katrina Gould


We were more than happy with the service and we will be definitely using you again. We will 200% be recommending you to family and friends

Greg Oliffe


TJM Electrical & Solar replaced my solar panels and inverter following the failure of my original equipment. They were competitive in their quotes and offered a selection of high quality equipment from which to choose. Office support and service was excellent. Installation was fast, and conducted very efficiently. The installation team members were friendly and informative. Their advice on safety was relevant and clear. This firm sets a standard for which most should aspire.

Andrew Bevan

Air conditioning

Mern Industries is an outstanding family business. A very professional service – Communication was great, technicians were on time, products good quality and all rubbish was removed. Strongest recommendation given for this business.

Chris Dench


Tony &Sons have been our electricians for the last 8 years. I am unable to find fault with any of the work, as well all of the above very informative ,& take the time to explain any little detail that is relevant to the job

Gerard Hart

Electrical, Solar, Air conditioning

The Mernin Industries team is one of the best teams in the business for all electrical, air-conditioning and solar services. Always on time, very professional and friendly – no request is too much trouble. I highly recommend these guys.

Debbie McLean

Caboolture Building Approvals

Electrical, Air conditioning

I have been using Mern Industries for all my electrical, solar and air con requirements for my home, rentals and businesses. They are reliable, competitively priced and provide very experienced, friendly and professional service and advice for all electrical applications including big installations, new connections, renovations, solar, air-con and breakdowns. I wouldn’t use anyone else.

Di West

Suncoast Harvest

Solar, Air conditioning

We would highly recommend Mern Industries. They came and tested our solar system as we were not creating any power. They replaced a cracked solar panel and the isolators and now it works! They also installed a new air-conditioning unit in the house. The team were highly professional and efficient cleaning up after themselves and taking away the damaged items. Thanks so much.

Clare Burnett


Mern Industries was referred to me by a family member during recent home renovations. I could not be more happy with the recommendation.
During what was an extremely stressful time managing a wide range of trades Mern Industries was there to help, they turned up on time, helped me understand the impacts of my decisions and their work is of a very high standard.
We are so pleased with their work that we have continued to use their services on other repairs around our home and highly recommend them to family and friends.

Dean Bird

Electrical, Solar & Air Conditioning

We have been using Tony and his team since moving to Morayfield in 2015. They are professional and turn up when they say they will. They are always friendly and their work is always to the highest standard. Mern’s office Manager, Amanda is always friendly and helpful. She makes us feel like we are special customers.

Linda Guillesser


Mern Industries have been providing electrical services for us for about 3 years and have always provided high quality and reasonably priced services. Excellent to deal with from initial phone call to completion of job. Nothing is too much trouble for them. We highly recommend them.

Kevin Van Katwijk

Enhance Care