https://electrek.co/2018/05/11/tesla-giant-battery-australia-reduced-grid-servic...A new report now shows that it reduced the cost of the grid service that it performs by 90% and it has already taken a majority share of the market. ii
When an issue happens or maintenance is required on the power grid in Australia, the Energy Market Operator calls for FCAS (frequency control and ancillary services) which consists of large and costly gas generators and steam turbines kicking in to compensate for the loss of power.
Electricity rates can be seen reaching $14,000 per MW during those FCAS periods.
“In the first four months of operations of the Hornsdale Power Reserve (the official name of the Tesla big battery, owned and operated by Neoen), t
he frequency ancillary services prices went down by 90 per cent, so that’s 9-0 per cent. And the 100MW battery has achieved over 55 per cent of the FCAS revenues in South Australia. So it’s 2 per cent of the capacity in South Australia achieving 55 per cent of the revenues in South Australia.”
Various estimates have put the
cost savings to consumers from the FCAS market alone at around
$35 million, just in the first four months of its operation.
That’s a pretty good bang for the buck for the estimated
$50 million investment by the South Australia government. South Australia is the only state that has experienced a decline in FCAS(frequency control and ancillary services) prices over the past few months.
Wow the battery saved SA consumers 35 million in the first 4 months and only cost them 50 million and it will last at least 10 years and more realistically 15-20 years

we need one in every state, instant top up instead of a slow response from gas turbines and coal plants... looks like its one investment from SA govt that is working