Replace your outdated electric or gas hot water system with a high-efficiency heat pump and start saving immediately.
*Savings vary based on household usage and system replaced.
Check if you qualify for Victorian Government rebates.

Transparent pricing with no hidden costs, delivering real value after rebates.

Experienced, fully certified installers you can trust.

Transform your entire home with modern, eco-friendly energy solutions that make a difference.
We’re focused on long-term customer satisfaction — not short-term wins. If you have questions after installation, our team is easy to reach and ready to assist. From system settings to performance advice, we’re here to support you well beyond install day.
11+ Years in Business | 5000+ Happy Clients
albert lauTrustindex verifies that the original source of the review is Google. Appreciate dealing with Opt Energy for a 40kw solar battery storage system with a 12kw inverter as the service is excellent and the staffs are friendly and courteous. Highly recommended collee chappellTrustindex verifies that the original source of the review is Google. Ash & the Crew from Opt Energy delivered a Four 4️⃣ room Rinnai split system that works well beyond expectations. The installation crew from electricians to plumber & Split system specialists did an amazing job & completed ground floor & upstairs work in a single day. The Master units were installed to perfection in the side house driveway, awesome finish. The Opt Energy Team are terrific to deal with from the initial contact through to completion of the installation. Absolutely 💯 brilliant workmanship & communications @ HQ from Ash. Will definitely be utilising Opt Energy for our battery 🔋 installation ! Ironically enough most of the family have ‘Opt Energy’ installations. Daniel CorpuzTrustindex verifies that the original source of the review is Google. Sales person was direct and responds quick to inquiries and concerns. The scheduling was quick and the team that installed were very knowledgeable and even cleaned up after the job. A+ experience Manal PanditaTrustindex verifies that the original source of the review is Google. Very happy with my new solar panels. The installation was quick, and my power bills have already gone down. Great service and friendly team. Dave StewartTrustindex verifies that the original source of the review is Google. Thank you very much. OPT supplied and had their contractor installed our battery system. I was let down by another company, but OPT took on tje the job and completed it in a very timely fashion despite it being a large and complex system ( 50kwh with 2x 8kw inverters) And the price was better than anyone else had quoted. And adding a bonus was the contractor they used was excellent. Very knowledgeable, good workmanship and reliable. I know that im a hard customer to please but these guys and girls have restored a little of my faith in companies and trades people. Thank you again :-) Dilhara WeerakkodyTrustindex verifies that the original source of the review is Google. The solar battery works perfectly. It stores enough power for the night, and I can see the savings every week. Highly recommend their service. Senith FernandoTrustindex verifies that the original source of the review is Google. The entire team, from sales to installers, was amazing. They were polite, punctual, and clearly knew what they were doing. We installed three indoor units and everything was seamless. David WalkerTrustindex verifies that the original source of the review is Google. Very happy with the post-installation experience as well. I had a few minor doubts after a week, and their team was quick to respond and resolve everything. OPT Energy doesn’t disappear after installation, which is rareGoogle rating score: 4.0 of 5, based on 258 reviews
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290L Heat Pump System
320L Heat Pump System
270L Heat Pump System
A powerful and efficient hot water system built for comfort, savings, and reliability.
Not sure what size you need?
Book a free assessment and we will calculate the ideal capacity for your household.
Our Process

Quick call to see what rebates you qualify for

We assess your current system and usage

We process rebate claims on your behalf

Licensed technicians complete the upgrade

Energy-efficient hot water with long-term savings
Replace your old gas or electric hot water system with a modern energy-efficient heat pump and take advantage of generous government rebates.
Make the switch to all-electric living and enjoy lower energy bills, improved efficiency, and reduced carbon emissions — fully managed by Opt Energy.
Comprehensive system assessment and tailored recommendation.
Complete supply & professional installation included (after eligible rebates).
Whole-home comfort with high-efficiency performance.
We supply and install trusted brands including Emerald, EcoNova, Rinnai, NeoPower, Rheem and more.
Affordable finance solutions available. No upfront cost option available.