458 reviews
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Very Happy with the Team all the way through from ordering to finish product. The installation team were fantastic neat and prompt and the follow up has been beyond expectations
A very big thank you to James Vickery and all the aftercare people they took the time to assess my problem then fix it with the greatest of care I could not be happier I would recommend them 100% great people
Avoid them if you want a new Fronius setup or upgrading an existing one. 1Komma5 took over my previous good installer and got rid of their Fronius experts. The contractor who came to install the battery did not have Fronius experience and could not teach me how to use the much more complicated Fronius setup with a battery. Worse still, I had… Read more
an issue with the distributor and received no help from the support center. It was clear that the arrogant person did not know Fronius and was giving silly answers such as "my distributor was controlling my battery!" It took me many months to work out what the issues were and have the setup working optimally.
It looks like I am not alone in having issues post install. 1Komma5 support is bad.
Reviews with attachments
- +6
The battery system I purchased in September 2025 was a 1KOMMA5 1K5-BAT-4660-L6-27.96 kW modular battery combined with a 1KOMMA5 1K5-1P-HI-10-10000W inverter, which was the system recommended. We have had no technical issues with the system in the 12 months of its operation. A couple of settings needed to be reset over the months to achieve optimal… Read more
performance which is now tweaked. I have attached a couple of screen shots of the system's performance - one for an October day which was sunny and warm, and another for an October day which was rainy and cold. My running expenses (bills) over the last year have totaled -$343.49 (that is, $343 in credit). I would sincerely like to thank Blake Hurrell from 1KOMMA5 for the help he has provided since I installed my solar battery. I have a steep learning curve and he has always been there to help, going far beyond what I thought possible. Thanks so much Blake for your assistance.
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Matt from 1Komma5 has been amazing to deal with. He was able to ensure a seamless install and the local company that came to install on our remote town was wonderful, knowledgeable, polite and clean. We are very much enjoying checking the app to see what our solar is producing and love not needing to buy back power from the grid anymore. We… Read more
produced 70KW yesterday so gave back 50 to the grid. I’m now excited to see our energy bill lol
I did a lot of shopping around, getting quotes (local and online) but 1K5 had the best warranties and I love that their German engineered batteries will be working for years to come. Matt was never a pushy salesman like some other companies I dealt with and took care of me when things took longer than originally anticipated. Do you offer referral code because I’m sending a lot of friends your way! Haha
Cannot speak highly enough of 1Komma5. I had a couple of very negative experiences with 2 other solar suppliers before I spoke to 1Komma5 and it was a night and day difference. The team at 1Komma5 was so professional, they communicated and kept me in the loop throughout the whole process, went above and beyond on their promises and overall made me… Read more
feel like they actually cared. Not only that, the installation day was outstanding! The Team that came out explained everything in detail, they worked quickly and did an excellent job, tidying everything up nicely before they left.
Amazing experience... the Solar Consultant was excellent... broke the ice, made a quick friend, then really listened to us. Asked great questions and really listened to what we wanted to achieve which was $0 Bill to pay, protect us from the rising cost of electricity, be free to use our power the way we want with no stress, and deal with a… Read more
company that will be around for many years to take care off us! He really analyzed our bills properly across the year and then designed the proper battery to add on to our current 6.6kw solar system! By the end he'd covered everything we wanted and it felt natural and not pushy. So we signed up on the spot using the $0 Deposit repayment plan. It really is just a trade-off we stopped paying AGL and used that same money to simply pay off the Solar Battery. The pre-install team was great keeping us updated along the way we were installed 6 weeks later. Installers were prompt and professional and after good discussion we decided to put the battery on the outside wall instead of inside the garage. I love how they included a Cover the inverter and battery at no charge! We did need to use a brick to keep the battery level because our house is on slant. But that doesn't bother me. Got setup with Heartbeat AI which also set me up with Amber Electricity and now its been about a month and I'm already have no electricity cost and earning about $1-$3/day on top of no bills to pay! At this pace I'll be at $500/yr earnings!
It was a straight forward process with timeline point along the way that were clearly understood Show details
Updated: I believe in their product hence the reason I had selected them to be my solar and battery provider. There has been challenges along the way but they were able to redeem their shortcomings. Much appreciate to Graeme we had a great chat! He has put back my confidence with the company, 1Komma5. Thank you for the service! Show details
The initial sales rep was helpful and shared a lot of information. We ended up getting it installed a few weeks earlier than planned. The guys that installed the battery were just amazing. Informative and polite and shared along the way what they were doing and very respectful of our house, kids sand puppies. Also left no mess behind at all. It has been a week and so far all is going well. Show details
***WARNING: DO NOT GO WITH THIS COMPANY*** 1KOMMA5’s post-contract service has been the worst customer service experience I have ever had. What makes this particularly disappointing is the stark contrast between the attention and reassurance I received before signing and the lack of service afterwards. Two of the main reasons I chose 1KOMMA5… Read more
were their “5 YEAR MONEY BACK GUARANTEE” and the assurance that the battery could be relocated to our new property once it was built.
Before signing, I specifically asked the salesperson several times about the terms and limitations of the money-back guarantee. I was told: “There aren’t any… it applies if you’re not 100% satisfied; all you need to do is keep the panels reasonably clean.” I understood this to mean that if I was not satisfied with the system or service within the first five years, I could get my money back and 1KOMMA5 would remove the system.
== Before signing vs after signing ==
Before signing, the sales attention was relentless. The salesperson even arrived at our house unannounced to “help answer my questions” and encourage me to sign. Verbally, he was great at telling me what I wanted to hear, but I often had to ask several times before he would send written confirmation of his claims. I insisted that his verbal promises and guarantees be put in writing. They had appeared in my initial proposal and emails but disappeared from the formal contract. When I raised this, he assured me it was simply a mistake, added them back, and then applied further urgency to sign quickly or miss out.
After considerable reassurance, I signed. This is when the service dramatically changed. When I experienced problems with the system after installation, getting meaningful assistance was extremely difficult. My calls were repeatedly passed off between people with no follow-up, and generalised promises were made with no follow-through. This continued for several weeks without resolution and I discovered that my complaint had been closed.
Eventually, out of frustration, I posted an online review here.
Only then did 1KOMMA5 suddenly contact me and offer to resolve the issues. I was offered remedial work at no cost on the condition that I remove the review. I agreed, as I was worried it was my only option. However, being offered a resolution in exchange for removing a negative review left me extremely uncomfortable.
== The battery relocation ==
Around 11 months after signing the initial contract, I needed to organise relocating the existing battery to our new build, and installing a new solar system there. I found myself effectively locked into 1KOMMA5 because of the battery warranty and thus reluctantly requested a quote from them to carry out the new works.
Between 18 May and 15 July 2026, we repeatedly tried to obtain this quote. We supplied the salesperson with the construction plans, photos, roof pitch and other relevant information multiple times. He confirmed he had everything he needed and would send the quote that afternoon - days later I called to chase it up as I hadn’t received the quote, at which point he asked us to resend the same information because he “could not find it”. After that, he then insisted a site visit was necessary. My partner rearranged her workday to meet him at the agreed date and time.
He didn't show up.
When my partner called him, his response was: “Oh s**t, I forgot, I’ve been busy.” He then asked again for the same information we’d already supplied several times. At that point, I told the salesperson I had completely lost trust in 1KOMMA5 and wanted to invoke the “5 YEAR MONEY BACK GUARANTEE.” He said he understood and would stop making excuses.
== The “5 YEAR MONEY BACK GUARANTEE” ==
Approximately 90 minutes later, we suddenly received a quote. As a side note - it contained multiple errors and did not accurately reflect what we had requested. I emailed the salesman to reiterate that I have requested to invoke the guarantee. I also formally submitted a complaint to 1KOMMA5 via the channels specified in my contract and requested that the guarantee be honoured.
What followed was considerable pressure from the salesman to accept the quote proposal, including calls, texts and repeated emails, with references to a “stock-take sale”, a “matter of emergency” and deadlines for accepting the offer. At the same time, 1KOMMA5’s Head of Aftercare responded to my formal complaint stating that 1KOMMA5 would not “assess eligibility” until “after the fifth anniversary of installation" — in my case, 2030 — and that the guarantee was subject to the additional “full terms”.
After a few emails back and forth, I was then provided with a link and PDF containing additional terms and limitations that had never been disclosed to me before signing. These terms are fundamentally different from how the guarantee was represented to me when I made the decision to purchase.
This is now the main issue in my dispute with 1KOMMA5.
The “5 YEAR MONEY BACK GUARANTEE” was prominently promoted on my quotation and their website. I have repeatedly asked 1KOMMA5 to show me where these significant limitations were disclosed before I signed the contract and where they formed part of my signed agreement. I have not been provided with evidence showing that they were. They have however stated, “I do not want to speculate about the sales process”.
My attempts to resolve this directly with 1KOMMA5 have remained at an impasse, so I am proceeding with formal complaints to the Office of Fair Trading and the New Energy Tech Consumer Code (NETCC). I am posting this review because I wish I had known about these experiences before signing.
Hi Des, We’re truly sorry to hear this has been your… Read more (+2 replies)
Latest follow-ups
Alex, From 1Komma5 Gold Coast, Patiently Guided me thru The Procedure to Reconnect My App To Phone/I-Pad. Thankyou For All Your Help, Couldn’t be Happier With the Service. Regards Marion Tomlinson. Show details
Follow-up · I know, Should Any further Situations Arise, I Can Ring 1Komma5, Their Technical Support Team are More than Willing To Help ,Was Patiently Guided thru the Process to ,Reconnect,My Inverter/ Internet and Now My App, Is Working . Plus I Received Confirmation From 1 Komma5 that Everything Was Operating Fine, From Their Remote, Monitoring System. … Read more
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After quite a few install problems Allen Lui at Customer Care took time to listen and help us rectify the problems,it was a pleasure to have such fantastic help in getting our system up and running.No question or problem was treated badly,he was always ready to listen to our concerns Show details
Follow-up · One of our install problem still exists only started after panels were installed ,we have a leaking roof when it rains this was pointed out when we had the solar installed.We created a ticket to address this issue and with the constant rain we are experiencing at the moment the roof is still leaking.We thought it had been fixed but no it is still a problem.I have been back in contact with 1Komma and am now waiting for how it will be fixed,
I had my solar system installed in the second week of August, and at this stage I cannot fault the product. Everything has operated exactly as expected, with no issues in performance, monitoring, or reliability. Before committing to the… Read more
installation, I did extensive research on Google and found consistent feedback about the system being robust, well‑designed, and suited to Australian conditions. My experience so far matches that research. The system has been stable, responsive, and producing energy in line with what was promised.
While it’s still early days, the results are already noticeable. My predicted electricity bill dropped significantly after the system was switched on, confirming that the product is delivering real savings.
Based on my experience to date, the product appears to be high‑quality, reliable, and built to perform. I’ll continue monitoring it over the coming months, but so far it has met every expectation.
Follow-up · I’ve been absolutely over the moon with my 1KOMMA5° system since the install. The system is more than adequate for our needs, and my first electricity bill already shows a credit. Even on overcast days it still produces plenty of power and sends excess back to the grid. I can run the air conditioner without worrying about the power bill, which… Read more
Positive reviews
Very happy with our Solar & battery system from 1Komma5. The whole team has been very helpful from initial consultation to final install. A few teething problems after install but the team sorted it all out without a fuss. Highly recommended.
Very happy with my purchase of a Tesla Powerwall 3. They were very attentive to detail before and after the installation. Only one slight issue, which they quickly addressed. Thank you. Show details
Fantastic project. Very professional from the salesperson to the installer and beyond. Well done to all. I highly recommend others to contact 1Komma5 for all your solar needs. Show details
Negative reviews
We purchased a premium Tesla and Enphase solar package specifically to ensure we had reliable backup power during blackouts. During a recent outage, the system completely failed to charge the battery from our solar panels, leaving us entirely stranded. We have been trying to get a response regarding this major performance issue for over a month.… Read more
When 1KOMMA5° finally replied, they attempted to charge us a $350+ call-out fee to inspect an off-grid integration fault that should clearly be handled under warranty. We sent a formal response invoking our rights under the Australian Consumer Law (ACL), but they have completely ignored our 48-hour deadline. Their customer service is non-existent once they have your money. We have now lodged an official complaint with NSW Fair Trading to force a resolution. Avoid this company if you expect reliable after-sales care or a system that actually functions when the grid goes down.
The product seems fine but they damaged my property at the time of installation and didn't advise us, even when someone was home at the time. If you choose this small business just make sure you're there to watch them.
Hi Ahoo H, We’re truly sorry to hear this has been your… Read more
Very disappointing after-sales service We inherited our off-grid solar system when 1KOMMA5 took over from Arkana. When our system failed in May, displaying an internal Solar Charger Error #200 and leaving us without reliable power, we contacted 1KOMMA5 for assistance. We were told that no technician was available and were instructed in writing… Read more
to engage an emergency electrician. We did exactly that, in good faith, because we are off-grid and simply needed our electricity restored.
The electrician we organised attended and replaced the failed equipment with one they had in stock so we could get our system operating again. We subsequently submitted the invoice to 1KOMMA5 and then spent months chasing reimbursement and trying to have the persistent error code addressed.
During that time, emails went unanswered and repeated phone calls resulted in promises that someone would call us back, which did not happen.
More recently, 1KOMMA5 initially disputed the reimbursement, despite their employee's written instruction to engage an emergency electrician. They have now agreed to reimburse the $589 technician costs, which we appreciate however the rest of the invoice we paid remains outstanding with is approx $2800 for the replacement inverter.
There is also a separate issue that remains unresolved, the original Solar Charger Error #200 has still not been reset despite us raising this repeatedly following the repair as only 1Komma5 has the back end access to reset this.
Our biggest concern is the lack of communication and after-sales support when something actually goes wrong. Buying an off-grid system means relying on the provider when the system fails. Our experience has been that getting assistance when we needed it was extremely difficult.
The initial reimbursement is welcome, but after months of chasing a resolution, we are left questioning the level of after-sales support we can expect from 1KOMMA5 in the future. I would not recommend this company after our experience.
Recent reviews
This review is in reference to after sales service. I purchased my 32kw Battery and 10Kw Inverter back in March and I had a battery fault occur over the weekend. I was able to disconnect then battery by turning it off and the Inverter and PV’s worked great. I rang their service support line at 10:00am and the system was fixed and in service again… Read more
just after midday. It was a Firmware error which was fixed on line and the techy was a great young guy that knew his stuff! Great effort 1Komma5!
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Very professional, responsive and helpful. Aaron in support has been fantastic assisting me with some support matters. They are experts in Solar, and sell the best products/brands on the market. Very happy with the overall service, experience and results.
Alex Welch from the 1Komma5 tech team gave me some seriously good advice and support in how to configure the PV-Hub app. This will help a user better control their battery, whether you are subscribed to Amber or even an energy retailer. Legend, mate! Show details
The installation was very professional and through - fixed up issues with the previous installer and all systems are now working as planned. This is the 2nd installation from this company and after wait - Approval process - things went smoothly and quickly.
We couldn’t be happier with the customer service that 1Komma5 provided. We had a large and complex job with 34 solar panels, 4 Tesla batteries and 2 EV chargers run underground to an external sunken garage. Each time an obstacle appeared the team were able to adapt and accommodate to our needs. We had many quotes and I am confident that no other… Read more
installer would have provided the level of professionalism and customer service we had received. We are so happy we made the right choice!
I had an issue with my app controlling my solar and battery system called PvHub2.0. The issue was that the app stopped updating the status of the system and consequently I had to resort to exiting the app and restarting the app. After approximately 10 days of frustration I reached out to the 1komma5 team and within a day Alex Weltch fixed it up.… Read more
I’m super impressed with the fix and the speed of the resolution of the issue. Shout out to Alex Weltch cheers Eddie
The team has been exceptionally helpful and responsive. Alex and Jessica have provided excellent service. I would recommend 1komma5 to anyone serious about going to solar Show details
I had a seamless experience with 1Komma5. From quote, installation and final inspection I was kept informed all the way through, fantastic customer service and tradesmen. I would highly recommend 1Komma5 for solar and battery installation.
**Very disappointing experience** I have been very disappointed with my experience with 1KOMMA5. Powerwall 3 installation Following the installation of my Powerwall 3, there were problems with the firmware and wiring at the Tesla Gateway. It took about two weeks, repeated calls and numerous emails before a further visit was arranged. I had to… Read more
do much of the troubleshooting myself, including taking screenshots, monitoring my electricity meter and providing data from my solar system. Tesla Support confirmed that the firmware needed updating to support my combined Powerwall 2 and Powerwall 3 system, despite me repeatedly raising this with 1KOMMA5 support and the project manager.
Tesla Support also identified that the Powerwall 3 had been wired incorrectly at the Gateway. This caused grid exports after solar generation had stopped and prevented the Powerwall from properly powering my home. It is staggering that these problems were not identified through testing on the installation day.
Communication was very poor. The salesperson was initially the only person I could contact by phone, while the project manager did not respond to my emails. To his credit, the salesperson was sympathetic and helpful, which was the only positive part of the experience.
Meter-box upgrade
1KOMMA5 advised that my meter box required upgrading because it had a wooden backing and contained asbestos. I was told this was necessary for safety and compliance, and it was included in the quote. However, the installers arrived with no knowledge that this work had been quoted.
A Level 2 electrician was booked for a Saturday almost two weeks later, but nobody arrived. I received no phone call, email or SMS, leaving me waiting around all day.
Given the other installation problems, I no longer trusted 1KOMMA5 to complete this work properly and cancelled it. I will now engage my own electrician.
Overall, the experience involved poor communication, incomplete work, a missed appointment and far too much effort on my part to get the problems fixed. For an installation of this cost, I expected much better and could not recommend 1KOMMA5.
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Hi CSC, We’re truly sorry to hear this has been your… Read more (+1 reply)