The NSW Emergency Backstop Mechanism is a regulation that will enable the government to temporarily cut or halt the flow of solar energy into the power grid during times when there is too much. It will only be applied to new or upgraded solar systems from Spring 2025, so if you already have solar panels installed, this will not make any difference to you.

This system is required because excess solar power in the grid can cause electricity companies to struggle with keeping things operating smoothly. The power grid uses conventional power plants to regulate key things such as voltage and frequency. If solar energy overloads the system without regulation, it can cause problems.

Why Is the Backstop Needed?

Australia boasts one of the highest percentages of solar panel homes in the world, with more than 3.5 million homes powered by solar energy. This is significant, as on bright days, a great deal of additional electricity is fed into the grid.

When there’s excess electricity, voltage levels become too high. This can ruin electrical equipment at homes and businesses. Moreover, the power grid must remain constant at 50Hz frequency, and abrupt alterations due to excess solar power would result in blackouts. Additionally, excess solar power would bring electricity prices so low that the power stations could be forced out of operation. This would prove to be a serious issue in the future as power stations will still be required during nighttime hours and on overcast days.

To prevent these issues, the government and the Australian Energy Market Operator (AEMO) are seeking options to have more control over electricity in the grid.

What’s Going On with Electricity Demand?

On 26th October 2024, the demand for electricity in NSW and the ACT reached a record low of 3,121 MW due to so much solar power consumption. Solar panels were generating 61% of the power required in NSW during that period.

Each year, the least amount of electricity being consumed has been decreasing by around 500 MW, and this is likely to continue. To maintain the electricity system safe, at least 1.5 to 2 GW (gigawatts) of electricity demand must be maintained to keep vital power stations operational. In case something goes wrong, such as a power station breakdown, then additional demand may be required to maintain the system stable. This translates to the fact that by October 2025, there may be a requirement for around 400 MW of emergency backstop power to ensure that everything is going just fine.

How Will the Emergency Backstop Operate?

The backstop regulation will only be applied in desperate cases when other alternatives, such as utilizing batteries or requesting people to consume more power at specific times, are not possible. The government is also establishing a Consumer Energy Resources (CER) Installer Portal to ensure that new solar systems comply with the rules. New and updated solar panels must have smart inverters that enable electricity companies to cap how much solar power they push onto the grid when it is needed.

Existing solar panel owners don’t need to panic—this rule does not apply to solar systems that already exist.

What Do People Think About This Plan?

The NSW government is seeking public input until March 7, 2025, as part of its Consumer Energy Strategy. They are looking for comments from energy companies, solar businesses, and ordinary people about the backstop plan.

Others find that this is a good policy to maintain stability in the power grid. Some believe that the government should pay more attention to encouraging individuals to install home batteries or come up with better energy management before interrupting solar energy from entering the grid.

How Much Extra Power Can Be Controlled?

Currently, there is no regulation that dictates solar panel systems need remote controls in NSW or the ACT. However, the Australian Energy Market Operator (AEMO) is consulting with the government and Network Service Providers (NSPs) to develop a method of controlling additional solar power if necessary.

Electricity providers (DNSPs) predict they can prevent up to 120 MW of additional solar power from entering the grid if necessary. Some businesses also believe that they can change hot water heating schedules to release about 72 MW of electricity demand. These businesses have indicated, though, that they don’t have a lot of methods at the moment to implement AEMO’s direction to raise demand when it is needed. Without better tools being implemented, some regions could need to switch off some of the electricity lines to maintain the system in safety.

Are Other States Doing This Too?

NSW will not be the sole state to implement this regulation. Rules similar to this have already been established in Victoria, Queensland, and South Australia. These states are also attempting to find ways to manage the level of solar energy flowing into the grid in order to balance the system of electricity.

For instance, Victoria now mandates all new solar panel systems to include emergency controls so that they can be regulated if necessary. In Queensland, the electricity companies are developing improved means to manage solar power, and in South Australia, they are researching how to advance electricity flow during off-peak times.