Victoria solar feed in tariffs to vary based on time.

Victoria solar feed in tariffs – the state’s Essential Services Commission has this week released the details of a brand new feed in tariff (FiT) which changes depending on the hour of the day. It will be introduced to Victoria on July 1. Whilst not compulsory to begin with due to their complicated nature, the tariffs will likely be enforced in 2019/20.

Victoria solar feed in tariffs overview

Victoria solar feed in tariffs - Essential Services Commission
Victoria solar feed in tariffs – Essential Services Commission (source:

Changing from a flat FiT to one that is more in life with electricity demand makes sense given that a major problem for solar energy is dealing with supplying power in peak times and during heatwaves. Previously solar feed-in tariffs were calculated on a flat basis, and, although they’ve been raised recently, it’s been neglecting the idea that offering more money for people to feed power back into the grid via a ‘virtual power station’ is likely to help mitigate periods where electricity is unavailable or at a ridiculously high price. 

The idea of a ‘virtual power plant‘ is something being worked at via a supplier level (The AGL Virtual Power Plant‘), a state level (ACT’s Next Generation Energy Storage Program) and a combination of the two (Tesla’s virtual power plant in South Australia). This marks the first time they’ve tried to do this via varying FiTs, however., 

According to RenewEconomy, the regulations will require retailers pay a minimum of 29c per kWh for those who exporting power between 3pm and 9pm, a minimum rate of 10.3c per kWh those feeding power back into the grid between 7am and 3pm, and a minimum rate of 7.1c/kWh (which is actually less than the current price of 7.2c) for those exporting energy during off-peak hours – during 10pm and 7am. So, if people want, for 2018 they can pay an alternative flat rate of 9.9c/kWh, down 1.3c/kWh from the previous flat rate. 

The ESC said that the lower cost for the flat rate from modelling from ACIL Allen. This modelling showed that the “any-time price”of electricity has fallen, but the evening peak price is now higher, and that the constant addition of solar connections will lead to even lower day time prices.



Reposit Power and their Virtual Power Station

Canberra-based renewable energy startup Reposit Power are predicting their client base will double within a year, and hope to have their technology in 5,000 homes by 2020. Their ‘virtual power station’ model is one we’ve seen before (Enova’s community solar, AGL’s virtual power plant which is in advanced stages of trials), but we’re excited to see how Reposit’s system works. Anything that helps improve baseline power is great for Australian energy as a whole. 

Reposit Solar, the Reposit Box, and ‘Grid Credits’

Reposit Power Control Diagram
Reposit Power Operation Diagram (source:

Reposit Power have a ‘smarter, more intuitive way’ to control energy usage. According to their site, it typically costs approximately 4-6% on top of solar + storage, but these batteries will then be paid off in half the time as standard solar + storage. 

The system learns your energy usage patterns to feed back into the grid at optimum times. Every GridCredit you feed back into Reposit’s virtual grid represents a dollar off your bill – and the system automatically trades excess energy for GridCredits when the demand is at its highest. 

The system also uses advanced weather models to predict solar usage, factors in peak/offpeak tariffs, and will even charge your system overnight from the cheaper tariffs if it detects a probably energy shortfall for the next day’s peak hours.  It has an app which will display all information you need to know about the system, how much you’re saving, and how many GridCredits you are earning. 

Reposit Power Compatible Batteries

There are currently eight Reposit compatible batteries – they are available ‘pre-integrated’ from leading vendors or you can 

  • LG Chem Resu 6.4kWh
  • LG Chem Resu
  • LG Chem Resu HV
  • Fronius Solar Battery
  • GCL e-KwBe
  • Pylontech
  • Tesla Powerwall 1
  • Samsung All in One ESS

Reposit Power & Tesla Powerwall 2 Compatibility

Please note that there are no GridCredits on the Tesla Powerwall 2 as they won’t integrate with cloud / Internet only based control systems – given that it wouldn’t be able to function correctly if the Internet was unavailable. Since the Powerwall 2 is tremendously popular, this is a serious blow to Reposit Power’s ‘virtual power station’ – wonder if they’ll figure out a way to rectify this before the Tesla Powerwall 3 announcement

If you want to read more about Reposit’s choice to not integrate with these cloud control systems please click here to read a detailed post on their website. 

If you want to understand Reposit’s system please view the video below!