Closed· Confirmed
OPTIMUM SOLAR & HOT WATER PTY LTD
Location not known
Closed
17 May 2026
Trading since
4 September 2020
Systems installed (est.)
~392
Size
Medium
Why we think this
Closed because OPTIMUM SOLAR & HOT WATER PTY LTD (ACN 644076764) deregistered on 17 May 2026; ABN 40644076764 (OPTIMUM SOLAR & HOT WATER PTY LTD) cancelled on 3 June 2026; https://optimumshw.com.au/ does not answer (URLError). Closure dated 17 May 2026, from ASIC company dataset: OPTIMUM SOLAR & HOT WATER PTY LTD (ACN 644076764) deregistered. Against that: Google still lists Optimum Solar and Hot Water as open (14 reviews). Google and websites often lag a collapse, so the registers win.
The date comes from: ASIC company dataset: OPTIMUM SOLAR & HOT WATER PTY LTD (ACN 644076764) deregistered.
The business has stopped trading: a register, Google or the industry's review sites say so.
What customers said
The 5 star reviews say
Reviewers praise fast response, quick installs of hot water heat pumps and replacement units, fair or cheap pricing, clear communication and professional, friendly workers. Praise centres on the sale and install stages.
Summaries of the reviews, written by us from the public reviews.
The evidence
The legal entities behind it
OPTIMUM SOLAR & HOT WATER PTY LTD
ABN 40644076764 · Australian Private Company · Cancelled · since 3 June 2026
OPTIMUM SOLAR & HOT WATER PTY LTD
ACN 644076764 · Company · Deregistered · since 17 May 2026
Installer gone? We look after orphaned systems.
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