WEM Market
1 min read

Western Australia lets the tires down on rooftop solar

Yesterday, WA’s government announced a change to the regulated feed-in-tariff that’s offered to residential owners of solar PV. From November 2020, rather than receiving a flat 7c/kWh for excess solar exported to the grid, the new scheme will incorporate a Time-of-Export element. It includes some other interesting tweaks too but the solar time of export stuff is what caught my eye.

Export between 3pm and 9pm and you’ll receive 10c per unit, so a little better than the current scheme. Export outside of those hours and you’ll receive just 3c per unit. The idea of course is to discourage export during the middle of the day when the grid is often already awash with renewables.

One claim that’s been made a few times in the 24 hours since the announcement is that the new tariff will incentivise west facing solar. Interested to know if this might actually be true, we ran some crude analysis to explore the claim. The attached graphics compare yield and max possible feed-in earnings (under the current and new scheme) for two solar systems, one facing due North and one due West. To help focus on the question of ToE feed-in rates we’ve assumed the systems export 100% of their generated energy to the grid and collect the relevant tariff rate.

Pete Tickler
Chief Product Officer & Co-Founder
view aLl articles
Non Co-Optimized Essential System Services in the WEM

An introduction Non Co-Optmized Essential System Services (NCESS) in the Western Australian Wholesale Energy Market (WEM) and a summary of the new WEM Reliability Service to manage peak demand and minimum demand risks.

DER Orchestration in the WEM

Western Australia is a global hotspot for high-penetration of distributed generation in the electricity system, and the Government proactively defined a roadmap for DER integration and orchestration in early 2020.

New Price Floor Milestone for Western Australian Wholesale Energy Market

Today the Western Australian Wholesale Energy Market hit the price floor of -$1000/MWh for the first time on a weekday.

Subscribe to our newsletter
Thank you for subscribing to the Gridcog blog.
Oops! Something went wrong while submitting the form.
Related Articles