Solahart L Series Gladstone
Roof-Mounted Solar Hot Water That Lasts
The Solahart L Series 302LF18T is our flagship roof-mounted solar water heater — Australian made, sized for family homes and fitted by your local Gladstone team.
- Locally owned
- 70+ years heritage
- 4.8★ from 15,000+ reviews
Hot Water, Free From the Sun
For more than 70 years Solahart has led the way in solar hot water. Every system is engineered for tough Australian conditions and backed by a genuine Australian product warranty, so you enjoy reliable hot water and lower power bills, year after year.
Key Specifications
Solahart L Series 302LF18T in a nutshell
- Model
- 302LF18T
- Type
- Roof-mounted thermosiphon
- Tank capacity
- 300 L
- Collectors
- Twin flat-plate
- Made in
- Australia
- Rebates
- STC eligible
Why Homeowners Choose It
The benefits that matter
- Australian made and built for the harshest local conditions
- 300 litre capacity suits family households
- Free solar energy heats your water all year round
- Electric boost has your back through cloudy stretches
- Eligible for federal STC rebates that cut the upfront cost
- Backed by the Solahart Australian Product Warranty
Why The L Series
The Classic Solahart, Refined
The roof-mounted Solahart is the system that put the brand on the map, and the L Series 302LF18T is its most refined form yet. Australian made and proven over decades in the toughest conditions, it heats a 300 litre tank with free energy straight from the sun. For Gladstone families, it is the flagship pick for serious hot water savings.
How It Works
Simple, Reliable Thermosiphon Design
Twin flat-plate collectors soak up heat from the sun and circulate water naturally into the tank above — no pumps, no moving parts to wear out. An electric booster covers the cloudy stretches so you never run cold. It is a beautifully simple design that keeps ticking over year after year in CQ conditions.
Customer Reviews
Thousands Of Central Queensland Families Trust Us
Neat installation using the best panels
Top job, and the installation is very neat. The crew consulted me on every aspect and gave fantastic help getting the live monitoring app set up. The sales team listened to our needs and were professional and knowledgeable throughout. Using the very best panels available, it was great value for mone…
Otto van Nek
Still trouble-free after 22 years
Every staff member was friendly, helpful and quick to respond. Despite tricky access through the yard, the installers were well-organised and careful, doing the work neatly and leaving the area clean and tidy. We first bought from Solahart in 2000, and that first system gave us over 22 years of trou…
Marie Mann
The best looking solar install in the area
Right from the first contact I could tell these were professionals, and the advanced modelling in the quote was what won me over. Victor and Dylan patiently answered every question and left me with what I can only call the best looking solar install in the area. Nothing felt rushed and the quality r…
John Ward
Neat installation using the best panels
Top job, and the installation is very neat. The crew consulted me on every aspect and gave fantastic help getting the live monitoring app set up. The sales team listened to our needs and were professional and knowledgeable throughout. Using the very best panels available, it was great value for mone…
Otto van Nek
Still trouble-free after 22 years
Every staff member was friendly, helpful and quick to respond. Despite tricky access through the yard, the installers were well-organised and careful, doing the work neatly and leaving the area clean and tidy. We first bought from Solahart in 2000, and that first system gave us over 22 years of trou…
Marie Mann
Google Reviews
The best looking solar install in the area
Right from the first contact I could tell these were professionals, and the advanced modelling in the quote was what won me over. Victor and Dylan patiently answered every question and left me with what I can only call the best looking solar install in the area. Nothing felt rushed and the quality r…
John Ward
Neat installation using the best panels
Top job, and the installation is very neat. The crew consulted me on every aspect and gave fantastic help getting the live monitoring app set up. The sales team listened to our needs and were professional and knowledgeable throughout. Using the very best panels available, it was great value for mone…
Otto van Nek
Still trouble-free after 22 years
Every staff member was friendly, helpful and quick to respond. Despite tricky access through the yard, the installers were well-organised and careful, doing the work neatly and leaving the area clean and tidy. We first bought from Solahart in 2000, and that first system gave us over 22 years of trou…
Marie Mann
Large solar system installed in one day
The whole thing was very professional, from booking the install with Marty through to the wonderful work Victor and his team did. We're really pleased with the job, and impressed that such a large system only took one day to install. If you're thinking about solar, do yourself a favour and go with S…
Cameron Atkinson
Tailored to a pensioner budget
When the tradesperson assessed our home, he realised we'd be much better off swapping our old electric system for a Solahart unit that could cut our electricity bill by up to 75%, and at a far lower cost. For a household living on pensions, a saving like that makes a huge difference to our budget.
Kevin Fox
Friendly service and a neat heat pump install
Great friendly service the whole way, from the on-site quote through to getting our new heat pump system installed as soon as possible. The crew worked quickly and effectively, were happy to answer our questions, and cleaned up the site on completion, leaving a neat and tidy finish.
Dean Stockham
Quoted and installed within the month
They replied within 24 hours of my online enquiry, came out to quote the job, and had it finished within the month. You can't ask for anything better. Really happy with both the work and the communication.
Edward Cook
Panels and battery, great communication
Fantastic. We had panels and a battery installed, with prompt service and good communication throughout. Would recommend.
Nathanuel Holland
Amazing system that works perfectly
Two years earlier we'd put solar on another home and it was never a good experience. This time was amazing. It works so well and the installers were wonderful. All up an amazing company, and I'd use them again.
Glenda Stirling
Pleasant sales and excellent plumbing work
A good experience from go to whoa, with pleasant sales representatives and excellent plumbers who did a neat, professional job. Happiest money I've ever spent.
Robert Vecchio
Polite, knowledgeable installers and a great experience
From the office staff through to the team who installed our hot water system, the experience with Solahart Gladstone was great. The installers were very polite and knowledgeable, and nothing was too much trouble for them. I'd recommend this company.
Edward Strong
Competitive pricing and a respectful install crew
Friendly, helpful and prompt with communications, with fast installation once payment was made. The new owner makes you feel very relaxed and shows that customers matter to the team. As a lady home alone, I found the install crew respectful and happy to explain, creating a friendly, happy and relaxe…
Briella Marshall
Punctual, tidy trades with great communication
From quote right through to completion the trades were punctual, tidy, courteous and great communicators. 5 stars! Thank you.
Peter Rollo
Five days from enquiry to installation
Amazing experience, with only five days from enquiry to installation. Prompt and friendly service that made the whole process painless.
Tara Radunz
Professional heat pump water heater installation
Recently had Solahart install a heat pump water heater. The installation was very professional and I'm very happy with the service. Highly recommended. Well done Solahart Gladstone.
Jim483
High-quality, friendly trades staff again
Once again Marty and his team delivered fantastic service. The trades staff who come to our address are high quality, friendly and very approachable.
Robert Newton
Quick response with polite, considerate staff
They responded and acted on my initial request quickly. When turning off the water and power, all staff were polite and considerate and gave plenty of notice. Very impressive.
Vanessa
Faith restored with efficient service
My recent experience with Solahart was completely different to before. They turned up exactly when they said they would, assessed the situation and solved the issue. Mitch the plumber was efficient, easy to talk to and happy to explain what he'd done. My faith has been restored!
Sallie Matta
New owners fixed previous system issues
The new owners of Solahart have done an incredible job sorting out the previous owners' mistakes. Something I'd waited months for, they promptly sent a technician to go over my system and check it was all working correctly. Ken has been very genuine and kind to deal with. With the new owners, I'd re…
Jaquilyn Griffin
Urgent replacement completed faster than promised
The whole thing was painless. When I first contacted them for an urgent Solahart hot water replacement, they estimated two weeks to order and install. Most people who say two weeks really mean three, yet they had it done in little over a week.
Karen D Richards
Friendly, helpful team with reliable installers
Highly recommend Solahart Gladstone. Everyone is friendly, helpful and efficient, with a special shoutout to Maddisson who arranged everything for us. The guys who installed our panels were friendly and reliable, turning up when promised and communicating well the whole way through.
Pauline Grabham
Always willing to help the locals
The team at Solahart are truly amazing, always happy to help and explain any question you might have. Shoutout to Ken at Solahart Gladstone, forever looking after the locals. Couldn't recommend them enough!
Bradley Apex Group
Coordinated trades replaced our system in two days
We recently had our solar hot water unit replaced, a job that also meant replacing roof sheeting in two sections of our roof. It was carried out so efficiently that no temporary unit was needed. The old unit was removed and the new Solahart unit installed on the same day.
Barry Jard
Ken made going solar effortless
Ken at Solahart Gladstone is a total legend. He sorted out my solar and was a deadset legend to deal with the whole time. If you're wanting to go solar, Ken's your guy.
Bradley O'Neill
Local company with clear solar explanations
I went with Solahart because they're a local company. The work was done quickly and professionally, with very friendly and helpful service. They explained everything we needed to know about solar in a way we could understand. Would highly recommend.
Kyeta Ferricks
Knowledgeable, helpful installer did great work
Phillip the solar installer is really great at what he does, very knowledgeable and helpful in every way. We're really happy with his service. Great work Phillip, thank you.
Hot Crusher
Quick install with a thorough app explanation
The install staff were very quick with no wait time, a pleasure to deal with, and left the area tidy. Their explanation of the monitoring app was very thorough.
Kelly Gray
Damn good service and a nice install
Damn good service, and the guys did a really nice job on the install. Very happy.
brainstains 82
Professional service with amazing-looking panels
Thanks to all the Solahart staff for the professional service in installing our solar panels, which look amazing. (Brian and Isla Baker)
Roseanne West
Professional office and a communicative install team
Every time I went into the office I was dealt with professionally and promptly. The installation involved plenty of communication and friendly workmen. Thanks Solahart.
Bridget Conder
Painless install with friendly, neat workmen
Great service. The install was painless and the guys were friendly, neat and did a good job. Happy with the results.
The Wallers
Easy, stress-free process from the start
These guys were great, and the whole process was so easy and stress-free. Very highly recommend.
Karen Tom
All requests met by a polite team
The team were very polite and great to deal with, and every one of my requests was met.
Kylie
Professional job with highly satisfying results
Great service! The job was done professionally, leaving me very satisfied. Highly recommend.
Thu Nguyen
Friendly staff with competitive pricing
Excellent service, friendly staff and competitive prices. Would recommend this company and its new management. (Julie and Keith)
Julie Ede
Fantastic service, nothing was too much
Fantastic service where nothing was too much trouble. Would highly recommend them.
Trevor Webb
Arrived on time with no fuss
Turned up on time and got the job done with no fuss. Great work.
Bruce Lea
Very professional but friendly service
Service that was very professional yet friendly.
Jerry Burian
Great service, installation and product
Great product, installation and service!
Greg O'Shea
Prompt, friendly and helpful service
Great service that was prompt, friendly and helpful.
Karenne Goerg
Well organised and helpful
Helpful and well organised.
Kelly McGuire
Good job by the whole team
A good job done by all.
Basil Eremenco
Very helpful, even during busy times
Very helpful even when things were busy.
Randall Holliday
Very prompt and professional
Very professional and prompt.
Ron Rogers
Very helpful and very informative
Very informative and very helpful.
Susan Cadger
A very professional experience
A very professional job.
Greg Marbach
Would recommend
Would happily recommend.
Josh Kirkman
Great to deal with and a perfect installation
Absolutely great to deal with, with a perfect installation and great customer service too.
Blair William
Caring, helpful and always finds the answer
I've dealt with Anakee from Solahart Gladstone and would highly recommend her. Whenever she didn't have the answer, she'd find it promptly or point me in the right direction. A very caring and helpful person.
Lacy McDonald
Why Choose Us
Why Central Queensland Sticks With Solahart
Locally Owned
The Gladstone Central dealership is owned and run by Ken and Viktoria Geissmann, which means every conversation is with locals who genuinely know the Gladstone region.
70+ Years Of Heritage
Australians have trusted the Solahart name since 1953, and more than a million of our hot water systems now sit on roofs in over 70 countries.
Canstar Blue Number One
In 2024, and for the second year straight, Solahart took out the number one spot for Hot Water Systems in Australia, earning five stars for satisfaction, value and performance.
Approved Seller
As a New Energy Tech Approved Seller, we hold ourselves to strict consumer-protection standards across solar, battery storage and EV chargers.
Premium Brand Partners
Your system is built with components from Tesla, SolarEdge and GoodWe — gear with a proven track record in Australian conditions.
Free On-Site Assessments
Anywhere across the Gladstone region, we'll visit your home or business at no cost and work out the right system size for your needs.
Warranty And Accreditation
Genuine Australian Warranty Cover
Every L Series install is backed by the Solahart Australian Product Warranty and fitted by our SAA certified local team. Solahart was ranked Canstar Blue number one for Hot Water Systems, and we are a New Energy Tech Approved Seller. With 70 plus years of heritage, we will be here to service it for the long haul.
Local Proof
Trusted On Gladstone Roofs For Decades
Take a drive around Gladstone and you will spot Solahart roof-mounted systems still going strong after twenty years or more. We have installed hot water for thousands of households across Gladstone, Boyne Island and Tannum Sands, with more than 15,000 reviews behind us. Local after-sales care comes from the same team that installed your system.
Price And Rebates
Clear Quotes With Rebates And Finance
Federal Small-scale Technology Certificates take a solid chunk off the upfront cost, and we take care of all the paperwork. You get a fixed written quote covering the unit, install and warranty before we start. Interest free Zip finance is on offer to spread the cost.
Ready to Make a Start?
Local Solar Service Right Across Central Queensland
We take our services to customers throughout every region we look after.
Every region has its own conditions. We look at your local setup, design around it and deliver a service made to suit your property.
Your city not listed? Call (07) 4972 9249 or browse all locations. If you sit inside our service area, we'll get back to you.
Next Step
Ready to Take the First Step?
Book a free, no-obligation in-home assessment and your local Solahart team will design the right solar, battery or hot water system to suit your home.