How we’ve calculated these estimates

With the limited data we've gathered, we've made some high level estimates of your potential costs and benefits of switching to 100% renewables. The below provides an overview of our approach so you know what we've done to provide you with the estimates.

Please remember, this is an early-stage estimate, so it may be a little inaccurate. We'd encourage you to get in touch so we can help firm things up before you act!



Annual energy use

We've taken the monthly/quarterly estimate of your energy spend you provided, and used that to calculate your annual energy use by simply multiplying it out.



GreenPower

To calculate the cost of switching to GreenPower, we've taken this annual consumption value and then multiplied it by the additional cost to purchase GreenPower. We’ve used an estimate of 5c/kWh, which is indicative of offers currently available in the market.



Solar

To calculate the size of your solar, we've assumed that 60% of your energy demand occurs when the sun is shining on an average day. If you told us you operate during the night, we've reduced this to 40%.

We've then sized a solar system to meet this demand, with a base assumption on the average MWh/yr of energy produced per kW of solar installed.

For Victoria, we use a factor of 1.3 MWh/yr/kW.

To cost your solar system, we've used a standard factor of $1,100/kW for an installed solar system (which includes the government rebate STC/VEEC/LGC), and multiplied this by the solar system size calculated above.

To calculate the amount of time to payback the solar system, we've multiplied the amount of energy generated by the solar system we sized by a standard cost for grid electricity based on your state which it is offsetting. We've then divided the capital cost for the system by this value to give the payback in years.

Emissions

To estimate the emissions you could save from shifting to 100% renewable energy through GreenPower and/or solar, we've taken the estimate of your annual electricity use and multiplied this by the emissions intensity of grid electricity in your state, taken from the Australian National Greenhouse Account Factors.

These provide the emissions of electricity purchased in each state on an annual average in tCO2/MWh.



So there you have it, that's the magic inside the box, and hopefully this explanation assists you in understanding how we got to where we got to with your estimates! If you still have questions, just get in touch, we're always happy to chat!