So having said that Tiger, what do you say if any new building regardless of its class has to have both types of solar. Would that help?
I view solar as one simple type but the storage options are more complex.
I suppose I view it like this:-
Legacy:- mostly coal power with gas peakers to help because coal power plants cannot increase or decrease electricity production easily. It's expensive and bad for the environment and monolithic.
Modern:- solar and wind to generate electricity but mostly solar. The questions becomes how do we store energy that is variable. That storage has to be able to ramp up and down quickly in relation to production of electricity.
Batteries will handle a fair bit of storage but they aren't good at longer term storage - so multiple days and across seasons.
Hydro power is really good at storing electricity for multi-day lower energy production but not good enough for seasonal storage. The build of Snowy 2.0 was meant to be 6 billion dollars but it has blown out to 12 billion dollars. Personally I think this is cheap and a good deal. For some context the Subs we are buying and we may not even get are set to cost $360 billion.
There is basically a gap for seasonal storage. This is where gas peakers come in and why we are allowing gas production to remain. Gas peakers are cheap to build but they produce carbon and they are expensive to run.
The other issue is building transmission lines.
I basically think we have to build a tonne of solar and it's the backbone to the system but I don't really see how this is an issue. It's just a project execution issue. We can build solar panels all over the place. I think already it's something like 40% of households have rooftop solar. So adding it to buildings is more about making those buildings have lower electricity costs.