Solar Panel Power, The Future is Here – Already!

Solar has won. Even if coal were free to burn, power stations couldn’t compete

Solar-Panel-Power,-The-Future-is-Here---Already
In a solar-driven energy democracy, even free coal has no value.

As early as 2018, solar could be economically viable to power big cities. By 2040 over half of all electricity may be generated in the same place it’s used. Centralised, coal-fired power is over

Two weeks ago, for the first time in memory, the wholesale price of electricity in Queensland fell into negative territory – in the middle of the day.

For several days the price, normally around $40-$50 a megawatt hour, hovered in and around zero. Prices were deflated throughout the week, largely because of the influence of one of the newest, biggest power stations in the state – rooftop solar.

“Negative pricing” moves, as they are known, are not uncommon. But they are only supposed to happen at night, when most of the population is mostly asleep, demand is down, and operators of coal fired generators are reluctant to switch off. So they pay others to pick up their output.

That’s not supposed to happen at lunchtime. Daytime prices are supposed to reflect higher demand, when people are awake, office building are in use, factories are in production. That’s when fossil fuel generators would normally be making most of their money.

The influx of rooftop solar has turned this model on its head. There is 1,100MW of it on more than 350,000 buildings in Queensland alone (3,400MW on 1.2m buildings across the country). It is producing electricity just at the time that coal generators used to make hay (while the sun shines).

The impact has been so profound, and wholesale prices pushed down so low, that few coal generators in Australia made a profit last year. Hardly any are making a profit this year. State-owned generators like Stanwell are specifically blaming rooftop solar.

Tony Abbott, the prime minister, likes to say that Australia is a land of cheap energy and he’s half right. It doesn’t cost much to shovel a tonne of coal into a boiler and generate steam and put that into a turbine to generate electricity.

The problem for Australian consumers (and voters) comes in the cost of delivery of those electrons – through the transmission and distribution networks, and from retail costs and taxes.

This is the cost which is driving households to take up rooftop solar, in such proportions that the level of rooftop solar is forecast by the government’s own modellers, and by private groups such as Bloomberg New Energy Finance, to rise sixfold over the next decade. Households are tipped to spend up to $30bn on rooftop modules.

Two weeks ago, the WA Independent market Operator forecast that 75% of detached and semi detached dwellings, and 90% of commercial businesses could have rooftop solar by 2023/24.

The impact on Queensland’s markets two weeks ago is one of the reasons why utilities, generators and electricity retailers in particular want to slow down the rollout of solar.

The gyrations of wholesale power prices are rarely reflected in consumer power bills. But let’s imagine that the wholesale price of electricity fell to zero and stayed there, and that the benefits were passed on to consumers. In effect, that coal-fired energy suddenly became free. Could it then compete with rooftop solar?

The answer is no. Just the network charges and the retailer charges alone add up to more than 19c/kWh, according to estimates by the Australian energy market commissioner. According to industry estimates, solar ranges from 12c/kWh to 18c/kWh, depending on solar resources of the area, Those costs are forecast to come down even further, to around 10c/kWh and lower.

Coal, of course, will never be free. And the rapid uptake of rooftop solar – dubbed the democratisation of energy – is raising the biggest challenge to the centralised model of generation since electricity systems were established more than a century ago.

Network operators in Queensland, realising the pent up demand for rooftop solar, are now allowing customers to install as much as they want, on the condition that they don’t export surplus electricity back to the grid.

Households and businesses have little incentive to export excess power. They don’t get paid much for it anyway. Ergon Energy admits that this will likely encourage households to install battery storage.

The next step, of course, is for those households and businesses to disconnect entirely from the grid. In remote and regional areas, that might make sense, because the cost of delivery is expensive and in states such as Queensland and WA is massively cross-subsidised by city consumers.

The truly scary prospect for coal generators, however, is that this equation will become economically viable in the big cities. Investment bank UBS says this could happen as early as 2018.

The CSIRO, in its Future Grid report, says that more than half of electricity by 2040 may be generated, and stored, by “prosumers” at the point of consumption. But they warn that unless the incumbent utilities can adapt their business models to embrace this change, then 40% of consumers will quit the grid.

Even if the network operators and retailers do learn how to compete – from telecommunication companies, data and software specialists like Google and Apple, and energy management experts – it is not clear how centralised, fossil-fuel generation can adapt. In an energy democracy, even free coal has no value.

Source | TheGuardian

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The views and opinions expressed in this article are those of the authors/source and do not necessarily reflect the position of CSGLOBE or its staff.

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