Three key areas to check before buying solar (Part 1 – The Supplier)

How to achieve value for money with your solar investment while meeting your business needs.

If you are considering installing solar, a competitive process for procuring your solar system, installation and associated services is essential for achieving the best value for money while meeting your business needs.

Apart from price, there are three key areas to consider when comparing offers for your solar project. They are:

  1. The Supplier
  2. The Solution
  3. The Contract

In this blog, we look at what to consider regarding the first – The Supplier.

CEC Accreditations

There are three Clean Energy Council (CEC) accreditations which are a must for every solar project (without them, your project can’t generate STCs or LGCs):

  • CEC Approved Solar Retailer is awarded to businesses to show their commitment to responsible sales and marketing activities and industry best practice (the supplier you sign up with for your solar project must be a CEC Approved Solar Retailer).
  • CEC Accredited Designers and Installers recognises people who have undertaken the necessary training to design and install solar, batteries and other renewable energy systems (your chosen solar supplier may subcontract the design and/or installation so you may also need to check their subcontractors).
  • CEC Approved Product is awarded to solar modules, inverters and batteries that meet Australian Standards (we will cover products in our upcoming blog on The Solution).


The supplier you choose should have demonstrated extensive experience and capability in design, contracting and delivering solar projects. Preferably this will be in projects with similar features to your own, as highlighted below:

  • Geographical coverage: Relevant to your project locality and electricity network authority
  • Solar array type: Roof mounted, ground mounted, car park, floating solar
  • System size: Small (~10 to 100 kW), medium (100 to 1000 kW), large (>1 MW)
  • System type: Grid-connected, off-grid, embedded network, microgrid
  • Additional features: Battery energy storage, power factor correction, EV charging
  • Contract type: Outright purchase, power purchase agreement, lease, rental

Additional Services

Depending on the size, nature and complexity of your solar project and the ongoing services you require, you may need a supplier who has additional capabilities. These may include:

  • project management
  • local planning and development approvals
  • system performance monitoring
  • fault or underperformance detection and reactive maintenance
  • planned maintenance and cleaning


Choose a supplier that has the capacity to deliver your solar project on time. Compare the size of your project to the volume of annual solar installs for a given supplier. If the size of your solar project makes up a significant portion of the supplier’s annual volume of solar installs, they may struggle to deliver your project on time and with the quality and customer service you require, particularly if they have other ongoing projects in their pipeline.


Suppliers that have a healthy balance sheet and cashflow are more likely to be around for the long term. This means they can continue to honour warranty periods associated with your solar system and any other contractual obligations such as performance guarantees. Completing a credit check is easy to do and helps you to assess the risk of a supplier entering receivership or external administration.


It goes without saying, you need to check insurances. This includes public liability, professional indemnity, and workers compensation. Make sure insurance certificates are current, the insurance policies have acceptable caps and do not have unacceptable exclusions.


There are two items to check when it comes to a supplier’s experience:

Year of first solar install:

Suppliers that have been around for a long time are more likely to have an effective senior management team, have people who are experienced in delivering solar projects, and have developed organisational experience and competitive advantage overtime.

Customer experience:

Out of all the things to check with a supplier, customer experience trumps all others as it cuts through the glossy marketing brochures and sales pitches.

Always ask suppliers for details and customer contacts for their most recent solar projects completed. If possible, don't let suppliers cherry-pick as they will always choose projects where they know they have performed well.

Try to obtain a recent project example where the head contractor (i.e. the supplier's subcontractor that is responsible for managing the solar installation for a site) is the same head contractor proposed for your solar project.

For all solar projects contracted through Beam Solar, we obtain the following customer feedback regarding the project and the supplier once the system is installed:

  • Contract negotiation process
  • Project management
  • Installation process
  • Quality of installation
  • Customer service
  • Value for money

We also offer our customers a free post installation inspection to assess the workmanship quality of their solar installation and to identify any defects. Further, we offer 12 months of free savings measurement and verification.

Our customer feedback process and post-installation services provide us with insights into the quality and performance of individual suppliers and their subcontractors. This information is invaluable to our customers when evaluating supplier offers for their own solar project.


There are two key items to check when it comes to a supplier’s safety management:

Safety management system:

Your chosen supplier should have a safety management system that is certified against one of the following occupational health and safety management systems standards:

  • AS 4804:2001
  • ISO 45001:2018

They should also have the following safety documentation:

  • Workplace Health and Safety (WHS) policy or equivalent
  • WHS manual or equivalent that contains the following:
    • Safety procedures
    • Job Safety Assessment (JSA) requirements
    • Safe Work Method Statements (SWMS) for all high-risk construction activities

Safety record:

A Loss Time Injury (LTI) is a single incident that results in a fatality, permanent disability or time lost from work. It could be as little as one day or shift. The severity of injury is not considered in the number. Ask suppliers for company-wide LTIs and total hours worked covering all their solar projects for the past couple of years.

The Lost Time Injury Frequency Rate (LTIFR) can then be calculated by dividing the LTI by the total hours worked. As most suppliers use subcontractors for the solar installation, it’s essential the LTIFR includes the LTIs and hours worked by all subcontractors that have been engaged by the supplier.

A supplier with a relatively high LTIFR compared to the industry average is a red flag and should be investigated further.

If a supplier cannot produce the numbers to report their LTIFR, then this is an even bigger red flag as it may mean they aren’t even monitoring and recording their safety incidents which indicates a general lack of safety management.

Safe Work Australia has a tool on their website to help you calculate the LTIFR and provides a comparison to the industry average.

Quality and Environmental Management

The last thing to check for a supplier is whether their quality and environmental management systems are certified as per the ISO standards below:

  • ISO 9001:2015 – Quality Management System
  • ISO 14001:2015 – Environment Management System

While ISO certification is not critical, it is preferred.

About Beam Solar

While the above items are not exhaustive, they are the minimum checks we recommend before you sign a contract with a supplier for your solar project.

When you engage Beam Solar for your solar procurement, you get access to the best suppliers in the industry, rigorously vetted by us across all items covered above plus others. We can also tailor our process to meet your needs. This includes incorporating additional supplier assessment criteria set by you or inviting new suppliers onto our platform and vetting them under our supplier assessment and registration process.

Stay tuned for our upcoming blog covering the next key area to consider before buying solar – The Solution.

In the meantime, if you are wondering what solar can do for your sites, start a Beam Solar assessment by clicking the button below.


Start a Solar Assessment


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