Trentham Energy

At risk· Confirmed

SIS Solar

Wyong, NSW

Sign seen

20 August 2026

Trading since

14 April 2023

Systems installed (est.)

~716

Size

Medium

Why we think this

Under threat because Business name SIS SOLAR cancelled on 20 August 2026; SIS SOLAR PTY LTD (ACN 679225613) has strike-off action in progress; http://www.sis.solar/ is a parked or for-sale domain. Also: Google lists SIS Solar as temporarily closed. Still trading signs: ABN 70679225613 (SIS SOLAR PTY LTD) is still active. One more independent source would confirm it as closed.

The date comes from: ASIC business names: Business name SIS SOLAR cancelled.

One sign of trouble (a cancelled name or ABN, a dead website, a run of one star reviews) but not enough to call it closed.

What customers said

The 5 star reviews say

Reviewers praise the sales process (quick quotes, clear system recommendations from John and Simon), the professional and efficient installation by SIS's own installers, and good follow-up service and communication after the install.

Summaries of the reviews, written by us from the public reviews.

The evidence

  • 20 August 2026Business name SIS SOLAR cancelledASIC business names register · check it
  • Seen recentlySIS SOLAR PTY LTD (ACN 679225613) has strike-off action in progressASIC company register · check it
  • Seen recentlyhttp://www.sis.solar/ is a parked or for-sale domainThe company's website · check it
  • Seen recentlyGoogle lists SIS Solar as temporarily closedGoogle business listing · check it

The legal entities behind it

  • SIS SOLAR PTY LTD

    ABN 70679225613 · Australian Private Company · Active · since 17 July 2024

    Trading names: SIS SOLAR

  • SIS SOLAR PTY LTD

    ACN 679225613 · Company · Strike-off in progress

  • SIS SOLAR

    Business name · Cancelled · since 20 August 2026

Installer gone? We look after orphaned systems.

If the company that put in your solar or battery has closed, we can check the system, chase the manufacturer's warranty and keep it running.

SIS Solar: At risk (Wyong, NSW) | Trentham Energy