Energia
Kosta shows up in person when competitors email quotes — and customers say it made all the difference.
That in-home assessment matters practically: reviews describe systems being customised to the home's actual energy needs and roof layout rather than a one-size package. The 30-year workmanship warranty is worth asking about in writing before you sign, as several customers named it as a meaningful differentiator, and it is worth confirming exactly what it covers. At under two years old as a business, Energia's track record is still short, but every one of its 21 reviews is five stars — if you are comparing them against longer-established operators, asking for references from installs completed 12-plus months ago is a reasonable step.
Their work
What it's like working with them
Based on a sample of Google reviews (21 total)
What they help with
Based on what their customers hired them for
Credentials & background
Sourced from 5 public records so you don't have to look them up yourself
About Energia
Kosta leads consultations at Energia, and his name appears in more reviews than anyone else on the team — customers specifically credit him with in-home assessments, honest advice, and a no-pressure approach that made them feel confident rather than sold to. The installation side is headed by Oscar (also referred to as Oska), whose crew is praised for punctuality, minimal disruption, and cleaning up after the job, including removing old panels. What distinguishes Energia from typical solar installers in the Parramatta area is their focus on solar-plus-battery systems — the Sungrow 20kW and ESY 30kW batteries appear in reviews — rather than panels-only work, and they offer a 30-year workmanship warranty that customers specifically called out as a differentiator when comparing quotes. Reviews suggest the business actively caters to first-timers and older homeowners who felt confused or pressured by other companies, with several customers noting that Energia was the only operator who showed up in person rather than emailing a quote. They serve both residential homes and at least one commercial property (a tourist motel appears in the reviews), primarily across Greater Sydney. Post-installation support — including app setup, a follow-up check-in, and ongoing monitoring assistance — is mentioned often enough that it appears to be a deliberate part of their process, not just a one-off gesture.
Best for: homeowners comparing multiple solar-plus-battery quotes and wanting an in-person assessment, first-time solar buyers who need clear explanations without sales pressure, and households wanting a battery storage system paired with their existing or new panels.
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Claim This Profile — Free →Common questions about Energia
Does Energia come out to assess your home before quoting, or is it all done remotely?+
Based on multiple customer reviews, Kosta from Energia conducts in-person home visits as the standard first step — not just for large jobs. Several customers specifically switched from other companies who only offered phone or email quotes without seeing the property. This in-person assessment is used to review your energy bills, evaluate your roof, and design a system tailored to your actual usage. If a fully remote quote is what you need, it is worth confirming with them directly whether that option exists.
What battery brands and sizes does Energia install?+
Reviews mention at least two battery systems by name: the Sungrow 20kW and the ESY 30kW, both installed in residential properties in Greater Sydney. Customers report that batteries are matched to their energy usage rather than a standard package being pushed. One reviewer noted that Energia's quote for a battery was more than $2,000 less than two competing quotes for the same product, though pricing will vary by system size and property. Confirm current brand availability and sizing options directly, as product ranges can change.
What does Energia's 30-year workmanship warranty actually cover?+
Multiple customers mention a 30-year workmanship warranty as a reason they chose Energia over competitors, and it appears to be a genuine differentiator in their sales process. However, the reviews do not detail the specific terms, exclusions, or what is covered versus the manufacturer's product warranty on the panels and batteries themselves. This is worth asking Kosta to explain in writing before signing — specifically what constitutes a workmanship defect, whether the warranty is transferable if you sell the home, and what the claims process looks like.
What happens after the solar system is installed — is there any ongoing support?+
Post-installation support appears to be a structured part of Energia's process rather than an afterthought. Reviews describe Oscar's installation crew walking customers through the system on the day, setting up the monitoring app before leaving, and a follow-up contact approximately one week after installation to check performance and help optimise energy usage. One customer with a Sungrow battery noted that the system was remotely monitored and that Energia helped them interpret the app data. Reviews don't mention any ongoing maintenance contracts, so confirm whether scheduled servicing is offered separately.
Does Energia work on commercial properties, or only residential homes?+
The majority of reviews are from residential homeowners across Greater Sydney, but at least one review comes from a commercial customer — Almare Tourist Motel — who described the service as professional and the tradesman as informative. The business is categorised as a sole trader operating from Parramatta, so it is worth having a conversation about project scale before assuming they can handle larger commercial installs. For standard residential properties, the review record is consistent and detailed.