Solar PV and EV Charging – Power Equipment

Bridgeford Group was engaged to provide advisory services to determine the optimum solar system sizing for a large diesel engine distributor in Melbourne, Power Equipment. This distributor had set targets to “go green”, but wanted external expertise as the solar industry is saturated with many low-cost and low quality suppliers, many of which will just recommend the maximum size based on roof area, not suited to electrical load.

The client was also interested in funding options including direct purchase, on-bill finance and power purchase agreements.

Bridgeford Group performed on-site investigations, utility analysis and design calculations, providing optimal sizing to reduce peak load and best payback. Bridgeford Group’s engineers carried out the concept design including location, sizing and technical requirements for the solar, new switchboard and EV charging infrastructure. In addition, funding mechanisms were analysed and compared to arm the client to make an informed decision when engaging with solar installers.

Following the original advice, various government incentives and changes to electricity prices, feed in tariffs, technology and solar system prices necessitated an update to the design. Bridgeford Group assisted Power Equipment by re-assessing the original advice and resizing the system, optimizing the inverter design to reduce cost while providing required performance, reviewing the fee proposals from suppliers the client had engaged for pricing, and then reviewing the installed system for quality and defects after installation.

Due to this close working relationship as the owner’s engineer, the client then re-engaged Bridgeford Group to advise and assist with the installation of Electric Vehicle Charging infrastructure, vet and engage suitable subcontractor and manage these works.

The solar system and EV charging combined has reduced the client’s carbon footprint by over 131,000 kg of CO2 per annum for the solar system, and 4,000kg CO2 and 2000L fuel per annum due to the electric vehicle charging point, when compared to a similar sized petrol vehicle. This is equivalent to 2000 trees, or 37 households worth of carbon. The system payback is now under 4 years due to increasing electricity rates, with an annual benefit of $32,000 per year.


Pre and post solar average daily electricity profile. Excess energy is now being used for EV and some energy is being exported to the grid