Based on his Stucco experience Bjorn suggested to us that we initially aim to limit our system to solar collection and delivery to our units, probably in a 9 unit or fewer structure to avoid being treated as a Registrable Applicant by the AER. This will still require that we seek approval to have a D2 Deemed retail license to sell electricity. Thus, the Strata would own all the meters and bill the connected units/consumers. Every couple of years the Strata might then go to the market to seek bids for cheaper electricity provision. [I’m not sure that I have got this right]. This would mean leaving the Battery Storage phase until later after we have refined our collection and charging system.
To prepare for this we need to collect data about current electricity usage over the past 12 months from each of the households so we can establish our ‘before’ costs across the complex. We also need to commission a contractor to examine our roof spaces and what they could generate given different degrees of access to the sun over the four seasons.
Our next steps
- Obtaining the household electricity bills. At this stage we think most if not all owners will be likely to assist with this data collection. There may be only one owner whose property is an investment and he retains an active interest in the Strata.
- Bjorn stressed that most of the emissions reduction in Australia over the past couple of decades has been due to much increased efficiency of energy usage rather than the advent of renewables. This, logically, raises the potential for our households to benefit from reduced waste and/or greater efficiency of usage. Therefore, we agreed we should offer to undertake an energy audit for each unit.
- We need to choose a Contractor to undertake the analysis of our rooftop solar collection potential. The staff at the SCC are likely to be able to suggest possible contractors from which we could seek quotes. Bjorn thought that Energy Smart Strata could be a possibility and that Green Strata are very good on legal and regulatory issues. It could also be worth contacting Ausgrid to see what their intentions might be given the research they have been doing on community attitudes to future energy possibilities.
We can pursue all of the above while we are awaiting the outcome of our Innovation Grant Application to SCC.
Post workshop note from Bjorn
My notes from our discussion on next steps were:
1) Get bills (great/crucial engagement opportunity).
2) Do energy efficiency audit – possibly DIY by members with interest in teaching themselves the basics (another great/crucial engagement opportunity).
3) Decide on how tackle embedded network issue. (My advice remains looking at non-embedded network solutions, favouring engineering challenges/solutions to regulatory ones!)
4) Decide on engineering solution for solar system.
Lastly, I had an interesting surprise visit from a law lecturer from the ANU today who suggested that one really needs to prepare a rule change proposal to the AEMC to take down the barriers for exactly the regulatory barriers we discussed this morning. I’m not holding my breath, but it’s encouraging to hear that legal types are engaging with these challenges.
As noted above, we initiated this workshop following the recommendation of the SCC group that advised us on our Grant Application. Bjorn is a Physicist whose PhD was focused on Solar Panel technology and he played a major role in the success of the Stucco Student Housing Cooperative’s installation of an AER-approved embedded solar collection and storage network. He was an ideal person for us to learn from since this has been the kind of network we have been thinking of.
There are 40 tenants in the Stucco Co-op. Perhaps the most outstanding figures arising from this experience are as follows: the design and planning for the network took about 3-4 months and the installation 8 days; dealing with the Australian Energy Regulator (AER) took 9 months and cost $130K in pro bono legal fees. The network of solar panels and battery storage feed a parent meter connected to the grid. This meter connects to individual meters for each unit so that the Co-op is the seller of electricity to the 40 consumers.
In addition to the technical questions of the types of panels, batteries and meters and their configuration the design phase had to address the important issue of pricing covering such things as differences in time of use and the different rates for local (system) provision versus grid provision. All of these things involved tricky decisions which the eventual beneficiaries (the occupants) needed to engage with if they were to support the shift to the network.
It would be easy to conclude that these technical, economic and social issues would be the really difficult ones to overcome before there would be sufficient support to make the transition. Indeed, later in the discussion, Bjorn affirmed very strongly that if we do proceed to an embedded network we MUST keep control and ownership of the meters. But, the Stucco experience demonstrated that the really difficult issues are the bureaucratic and legal ones that arise in dealing with the AER.
It appears that the primary emphases of the AER when dealing with small to medium-sized network applications are to ensure competition between providers and power for consumers. It seems that minimising the cost to consumers via a cooperative provider is of no account to the AER. Thus, when it dealt with Stucco it demanded exhaustive contract provisions in granting the license for Stucco to sell electricity and in the service commitments to its consumers the 40 student occupants.
It is instructive to learn that the relative costs of this whole process from go to woe were $95K for the design, provision and installation of the technical system including building modification costs (including fire-proofing the battery installation) so that the Co-op covered the full cost of connection to the grid. This compared with $130K for the legal services required to deal with the AER. This extreme difference would have torpedoed the project were it not for the provision of pro bono legal work by former tenants of the Co-op.
Despite this tale of struggle, the outcomes since the commencement of the embedded network show that the Co-op as a whole is paying 90% less for its electricity and the student consumers are paying 50% less, the difference covering the amortisation of the $95K capital cost of connecting to the grid.