Net Metering 3.0: What You Need to Know About the Latest Changes

The last decade or so has witnessed a boom in the number of people going solar, especially in the state of California.

This didn’t happen by chance.

Behind the abnormal rise of solar in the state were several factors, with one key driver being the financial incentives introduced by the government. It is thanks to these incentives that solar went from being an expensive investment to one that’s more affordable and lucrative. One can get compensated for investing in solar in a lot of ways (Click here to know more about different financial incentives available).

Among them is a concept called Net Metering!

The idea behind net metering is simple: property owners whose PV systems are tied to the power grid can export the excess energy they produce back to the grid and get compensated for it.

Generally, the higher the amount of energy sent to the grid, the greater the compensation is. While this has more or less remained the same, the criteria for compensation has not. Revisions have been made in the past to the structure of compensation solar owners stand to receive from it.

For instance, net metering 1.0 gave way to what is known as net metering 2.0, and here the rate for each kwh of energy exported fell.

But despite this reduction, net metering, as a scheme, remained a potent avenue for property owners looking to cash in on their solar PV systems.

Until now!

On December 15, 2022, the California Public Utilities Commission (CPUC) unanimously voted on and passed net metering 3.0, which threatens to devalue the present net metering rate structure within the state.

Let’s delve a little deeper into the forthcoming changes and what to do about it.

What is Net Metering 3.0?

As we saw earlier, net metering 3.0 is the latest update on California’s net metering policy voted and passed by the CPUC recently.

As of now, NEM 3.0 applies to the customers of the state’s three major utilities:

* Pacific Gas & Electric (PG&E)

* Southern California Edison (SCE)

* San Diego Gas & Electric (SDG&E)

What are the Forthcoming Changes under Net Metering 3.0?

Export rates take the biggest hit under NEM 3.0, and here’s why:

Earlier (i.e., under NEM 2.0) on average, the rate for a kwh of electricity exported back to the grid was $0.30. This is set to go down drastically once NEM 3.0 is in effect. The revised rate will come down to roughly $0.08/kwh, which is a whopping 75% less than the average export rate under the previous scheme.

Such a reduction in export rates also means longer payback periods and lower cost savings, when compared to NEM 2.0.

All these may spell an end to the state’s favorable net metering plans and set off a new trend, wherein prospective solar owners find pairing their solar PV systems to battery storage units to be more lucrative than sending excess energy back to the grid.

So, in all probability, NEM 3.0, with its reduced energy export rates, can have a detrimental effect on what has otherwise been a booming market for solar in California.

That said, not all is lost, especially for property owners who already own a solar PV system.

This is because NEM 3.0 is retroactive, meaning it won’t apply to existing solar owners whose PV systems are already tied down to NEM 2.0. They are free to enjoy the benefits of NEM 2.0.

Meanwhile, those who are looking to go solar can also leverage NEM 2.0, but only if they act in time.

Note that although the bill has been passed in December 2022, NEM 3.0 won’t be put into effect until April 13, 2023.

So prospective owners can take heart from the fact that there is still time (albeit little) for them to tie down their PV systems to NEM 2.0.

This… brings us to our next concern.

How to Grandfather a Solar PV System into NEM 2.0?

For a solar system to be grandfathered into NEM 2.0, one is required to follow the following steps:

* Apply for solar interconnection before April 13, 2023.

* Ensure that the PV system is installed and permission to operate (PTO) is received within three years of submitting interconnection application.

Do this, and prospective solar owners will be immune to the imminent changes in net metering policy.

The only constraint here is time, so one would do well to remember that at the end of the day, it’s the proverbial early bird that goes on to catch the worm.

So, if ever there’s a good time to go solar it is now!

Worried about securing solar permit in time? We, at Illumine, can fix you up with bespoke solar permit packages that make the often drawn out process of acquiring a permit a breeze.

Frequently Asked Questions

1. What is solar curtailment in Australia?

Solar curtailment occurs when generators are required to reduce output due to grid constraints, despite available solar resource. In the National Electricity Market, this is typically driven by congestion, voltage limits, and system security requirements set by Australian Energy Market Operator.

2. Why is solar curtailment increasing in the NEM?

Renewable capacity is growing faster than transmission infrastructure. Many regional networks were designed to serve demand, not export generation, creating bottlenecks as new solar connects.

3. Can battery storage reduce solar curtailment?

Yes, but only when properly designed. Co-located BESS can reduce curtailment by absorbing excess generation and reshaping exports, provided it is engineered around local network constraints rather than generic assumptions.

4. What is Hybrid Energy Yield Assessment (Hybrid EYA)?

Hybrid EYA models solar, battery storage, load, and grid constraints as a single integrated system. It captures real-time interactions that conventional, sequential energy modelling misses.

5. Which regions in Australia experience the highest curtailment?

Curtailment is most severe in constrained regional zones, particularly western New South Wales, north-west Victoria, and parts of South Australia, where congestion and voltage limits are already binding.

6. How can battery charging contribute to curtailment?

During peak solar periods, high battery charging can increase local voltage, reducing allowable export capacity. If the battery fills too early, it may be unavailable when curtailment risk is highest.

7. What is the difference between structural and recoverable curtailment?

Structural curtailment is driven by persistent transmission limits and requires network upgrades. Recoverable curtailment arises from operational constraints and can often be mitigated through storage design and control strategy.

8. How accurate is Hybrid EYA compared to traditional modelling?

Hybrid EYA provides materially higher accuracy in constrained networks by explicitly modelling voltage limits, export constraints, and battery state-of-charge dynamics that standard yield assessments ignore.

9. When should Hybrid EYA be used?

Hybrid EYA is essential when export limits are below peak generation, networks are voltage-constrained, or battery sizing and control materially affect curtailment and revenue.

10. Will transmission upgrades eliminate curtailment in Australia?

Transmission upgrades will help in the medium term, but they won’t arrive fast enough for projects being developed today. Curtailment risk must be managed through intelligent system design in the interim.