Net Energy Metering (NEM) has been a cornerstone in the advancement of solar energy in California and across the United States. This billing arrangement allows solar panel owners to earn credits for the excess electricity their solar systems generate, which is then fed back into the grid. Over the years, the California Public Utilities Commission (CPUC) has introduced various iterations of NEM, each with its own rules and benefits. This article aims to dissect the key differences between NEM 2.0 and the newly introduced NEM 3.0, helping you make an informed decision about your solar project.

Key Takeaways

  • NEM 3.0 introduces significant changes to solar billing, reducing compensation rates for new solar customers by about 75%, making it essential to understand these new policies.
  • If you’re already under NEM 2.0, you’re “grandfathered” into this rate structure for 20 years, allowing you to enjoy its more favorable benefits.
  • Pairing your solar system with battery storage has become increasingly important under NEM 3.0, allowing you to maximize your solar power and savings.
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What is NEM 2.0?

Key Features of NEM 2.0

NEM 2.0 was a significant update from its predecessor, NEM 1.0. It continued encouraging California homeowners to go solar by offering credits for excess electricity sent back to the grid. However, NEM 2.0 introduced some changes, such as slightly reduced rates and non-bypassable charges, which are small fees that support public-benefit programs. These charges were introduced to balance the benefits of solar power with the need to maintain the electrical grid.

How to Get Grandfathered into NEM 2.0

If you installed your solar panel system under NEM 2.0, you’re “grandfathered” into this rate structure for 20 years from the date of your system’s interconnection. This grandfathering allows you to enjoy the benefits of NEM 2.0 even as new net metering policies come into play. It’s a significant advantage, especially considering the changes introduced in NEM 3.0.

Solar Savings Under NEM 2.0

Under NEM 2.0, solar customers could expect substantial savings on their electricity bills. The value of solar was high, and the payback periods were relatively short, making it an attractive option for those looking to invest in clean energy. These savings were a driving force behind the surge in solar installations under NEM 2.0.

Introducing NEM 3.0: The New Era

What Changed in NEM 3.0 Solar Billing

NEM 3.0, approved by the California Public Utilities Commission on December 15, 2022, brought about significant changes. The most notable is the reduction in net metering compensation rates for new solar customers by about 75%. This shift has a considerable impact on the economics of going solar, making it essential for potential solar customers to understand these changes fully.

Impact on Home Solar Projects

The introduction of NEM 3.0 has made it more challenging for new solar customers to achieve the same level of savings as those under NEM 2.0. However, the payback period for solar projects in California is still favorable due to recent increases in electricity rates and decreases in solar prices. This complex landscape makes it crucial for homeowners to consider their options carefully.

Storage Under NEM 3.0

One of the game-changing aspects of NEM 3.0 is the increased importance of battery storage. Pairing your solar system with a battery allows you to store excess energy for later use, maximizing your solar power and minimizing what you export to the grid. This strategy is particularly beneficial under NEM 3.0, where the value of exported energy has decreased significantly.

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Difference Between NEM 2.0 and NEM 3.0

NEM 2.0 Rates vs. NEM 3.0 Rates

While NEM 2.0 offered credits close to retail electricity rates, NEM 3.0 has shifted to “avoided cost” rates. These rates are significantly lower, affecting the value of solar credits and your solar savings. This shift represents a fundamental change in how solar energy is valued, and new solar customers must understand this difference.

Grandfathered into NEM 2.0 vs. New NEM 3.0 Policies

If you’re already grandfathered into NEM 2.0, you’ll continue to enjoy its benefits for 20 years from your system’s interconnection date. New customers must adapt to the current NEM 3.0 policies offering less lucrative incentives. Understanding the nuances between being grandfathered into NEM 2.0 and adapting to NEM 3.0 can significantly impact your long-term solar savings.

Why You Should Go Solar Now

Benefits of Going Solar Under NEM 2.0

Doing so under NEM 2.0 could offer better financial benefits if you’re considering going solar. You’ll be locked into a more favorable rate structure, allowing you to maximize your solar savings. Given the changes in NEM 3.0, the benefits of locking into the NEM 2.0 structure cannot be overstated.

How to Maximize Solar Savings

Whether under NEM 2.0 or NEM 3.0, there are ways to maximize your solar savings. One effective strategy is to pair your solar system with battery storage, especially under the new NEM 3.0 rules. This approach allows you to store excess energy and use it during peak demand, increasing your savings.

Solar with Battery Storage: A Game Changer in NEM 3.0

Advantages of Pairing Solar with Battery Storage

Adding a battery to your solar system allows you to store excess energy during peak hours or when the sun isn’t shining. This strategy is particularly beneficial under NEM 3.0, where the value of exported energy has decreased. Battery storage maximizes your solar power and provides a backup during power outages.

How Battery Storage Affects Solar Project Economics

Under NEM 3.0, solar-plus-storage economics are more favorable than a solar-only system. The payback period for a solar-plus-storage system is now shorter, making it a wise investment for maximizing your clean energy benefits and contributing to a more sustainable future.

Frequently Asked Questions

What’s the difference between NEM 2.0 and NEM 3.0?

NEM stands for Net Energy Metering in California. NEM 2.0, in effect since 2016, credits homeowners at retail rates for excess solar power sent to the grid. A kilowatt-hour exported is worth a kilowatt-hour imported at night. NEM 3.0, effective April 2023, cuts export credits to wholesale rates, typically 50 to 75 percent less than retail. This dramatically changes solar ROI calculations.

How much less is my credit under NEM 3.0?

Export credits dropped from retail rates (15 to 25 cents per kWh) to wholesale rates (5 to 10 cents per kWh in many areas). You still get full credit for power your home uses immediately. The penalty applies only to excess power sent to the grid. This means larger systems designed to produce surplus are less profitable under NEM 3.0.

Does NEM 3.0 apply to all California households?

It applies to new solar customers and those who opt in. Customers who installed solar before April 14, 2023, can usually stay on NEM 2.0 for 20 years. This grandfathering is critical. Existing NEM 2.0 customers have vastly better economics. If you’re on NEM 2.0, don’t switch willingly. Check your utility bill to confirm which NEM version you’re on.

How does NEM 3.0 affect system sizing?

Under NEM 3.0, larger systems designed for excess export are less attractive. Systems sized to meet your own usage year-round still work, but generating and exporting surplus power doesn’t pay like it used to. The payback period extends by 3 to 5 years. Installers now prioritize consuming your own power rather than exporting it, sometimes recommending batteries for time-shifting.

Should I install solar before NEM 3.0 deadlines?

If you’re in California, NEM 2.0 grandfathering already ended on April 14, 2023. You’re on NEM 3.0. Historical deadlines matter only if you missed them. Going forward, focus on your own ROI under NEM 3.0 economics. Loans are cheaper than ever, and panels are less expensive than they were during NEM 2.0. Calculate ROI under NEM 3.0 rates before deciding.

Do other states have similar policies?

Net metering rules vary by state. Hawaii, Arizona, and New Mexico have reduced export credits. Most other states maintain retail-rate net metering. Check your state’s public utilities commission website for the rules in your area. California was the first to shift to wholesale credits, but others may follow. This is important to understand before going solar anywhere.

Is solar still worth it under NEM 3.0?

Yes, but payback periods are longer. ROI typically extends from 7 to 9 years under NEM 2.0 to 10 to 13 years under NEM 3.0. You still save money, reduce grid dependence, and lock in energy costs. Federal tax credits (30 percent) and state incentives still apply. If you plan to stay in your home 12+ years, solar still makes financial sense under NEM 3.0.

Summing Up

California’s shift from NEM 2.0 to NEM 3.0 fundamentally changed solar economics. Credits for excess power dropped from retail to wholesale rates, extending payback periods by several years. New customers face NEM 3.0, while those who installed solar before April 2023 can remain on the more favorable NEM 2.0 for 20 years. This creates a clear divide in solar ROI across California.

Despite less attractive credits, solar remains a solid long-term investment. Lower equipment costs and federal tax credits offset reduced export credits. The key is realistic expectations: expect 10 to 13 year payback periods instead of 7 to 9 years. Batteries become more attractive as tools for shifting production to evening hours when electricity is more valuable. Consult your utility for the specific rules in your service area before making decisions.

For professional solar installation and NEM 3.0 system design in your area, call us free on (855) 427-0058 or get a free quote at us.solarpanelsnetwork.com.

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