The problem is that the power isn't produced close to where it's used - house top solar typically produces peak output in the middle of the day when most houses are drawing very little power, so there is an excess of solar input through housing areas. Who is using the power at that time of day? Industry, offices, shops - which aren't located in the middle of the housing estates, so the power has to be sent some distance through the grid to get to them. But that solar output also needs to be balanced against the base load generation from the large power stations.Isn’t producing the power close to where it is used more efficient?
Does the grid need a redesign?
Will batteries end up catering for the design deficiencies of the current grid?
Yes, the grid needs a redesign and significant structural changes.
Batteries will be useful in the long run, especially for balancing out the peaks and troughs in solar generation that plague the system at the moment.
See my answer above - during the day when solar is producing its peak, most houses are using minimal power and the majority of grid is being used to power industry and commerce. And yes, your solar generation may essentially be powering a load a hundred kilometres away, not next door. Take a long hard look at just how many houses have roof top solar now - not just in your street, not just in your suburb, but across the entire city. And then at night when domestic power use peaks (and industry and commerce use troughs) where is the power coming from? Not your rooftop solar, or the rooftop solar across the street - it has to come from centralised power generation point.So if my street is drawing 100 amps from the power company on the existing network infrastructure why would it need upgrading when it's drawing 75 amps from a supplier and 25 amps from local solar produced power. It's not that solar produced power is going from my place to a place on the other side of the city. And it's not that every house in my street have solar on the roofs. Would say that of 20 houses around me 3 would have solar and 1 is only 1.5 kw. So would think that anything produced from them nothing would leave the street. So is there more not being told or is it convenient to blame the grid?
And then who pays for that centralised power generation and supply system? You don't want to pay - because you figure you're earning your keep because you think you should be able to sell your solar generation for top dollar - enough of a top dollar to get your night time power needs essentially for free.
Everyone wants to blame the government, or the greedy power companies, but this is a problem in every state, every large city and town across Australia - regardless of who is in charge and how their electricity market is set up. It is a problem because governments across the country, without thinking, gave the public a false expectation that they should be subsidised for reducing their power bill by installing solar.
Governments, state and federal, failed to appreciate the long term grid problems with this fundamentally flawed approach. And they failed to appreciate that their subsidies on solar were socially flawed in that low income earners, renters, people in public housing were unable to benefit from these government subsidies, so the "poor" (who couldn't install roof-top solar) wound up subsidising the "rich" who could install roof-top solar.
All we are seeing now is the market returning to where it should always have been, where people with roof top solar pay their share of being connected to the grid.