A sunny Sacramento afternoon can produce more electricity from your solar panels than your home needs at that moment. The question is what happens to that extra power. Many property owners ask, “how does net metering solar work?” The short answer is that surplus electricity flows to the utility grid and can earn bill credits. The more useful answer is that the value of those credits, and the best way to use your solar production, depend heavily on California’s current rules, your utility rate plan, and whether your system includes battery storage.
For homeowners, businesses, and developers, net metering is not simply a technical detail. It affects projected savings, system sizing, and the long-term value of a solar investment.
How Does Net Metering Solar Work?
A grid-connected solar system serves your property first. When panels are producing electricity, your home or business uses that solar energy before drawing power from the utility. If your property needs more power than the panels are generating, such as after sunset or during a high-demand period, electricity comes from the grid as usual.
When production exceeds on-site demand, the excess is exported through your electric meter to the grid. Your utility records both the electricity you import and the electricity you export. The exported energy creates a credit that can help offset charges for electricity you use at other times.
Think of the grid as a connection that keeps your property supplied when solar production is low and accepts excess generation when production is high. It is not a battery, however. You are not typically receiving back the exact same kilowatt-hours at the same value later in the day. That distinction matters under California’s current net billing structure.
California’s Current Net Billing Rules
California’s newer solar customers are generally served under a net billing tariff, often referred to as NEM 3.0. Under this approach, electricity you consume from the grid is charged at your normal retail utility rate, including applicable delivery charges and time-of-use pricing. Electricity you export earns a credit based on export values set by the utility program, which are often lower than the retail rate you pay to buy power.
Export values can change by season, time of day, and utility program. In many cases, midday exports are worth less than electricity purchased during expensive evening hours. This is different from the older version of net metering, where exported electricity was commonly credited closer to the retail rate.
The practical takeaway is straightforward: solar still reduces the amount of utility electricity your property needs to buy, but maximizing self-consumption is more valuable than it used to be. Using your solar energy on-site, or storing it for later, can improve the financial performance of a new system.
Customers who were approved under earlier net metering rules may have different treatment for a defined grandfathering period. Because eligibility dates, utility territories, and rate plans can affect the outcome, a solar proposal should use current assumptions rather than a generic savings estimate.
What Your Utility Bill May Look Like
Solar does not usually make a utility bill disappear entirely. Even a high-producing system can leave certain fixed charges, non-bypassable charges, minimum bills, or charges tied to electricity used when your panels are not producing enough. The exact bill format varies among utilities.
Your bill generally reflects two sides of your energy activity: electricity pulled from the grid and solar electricity sent to it. Credits from exported solar can offset eligible charges, while grid imports remain charges you must pay. At the end of a billing period, the utility applies the program’s rules to calculate the amount due or the credit balance carried forward.
For example, imagine your home produces substantial solar power at noon while the household is empty. That excess may be exported at a modest credit value. Later, when the family returns, turns on cooling, cooks dinner, charges an EV, and uses appliances, the home may purchase electricity at a higher evening rate. Solar has still lowered the overall bill, but the timing of production and usage has become central to savings.
Why Batteries Change the Equation
A battery allows your property to keep more of its solar energy instead of exporting it right away. During the day, excess solar can charge the battery. In the evening, the battery can power selected loads or reduce the amount of electricity purchased from the grid when rates are higher.
That capability can be especially valuable under California’s net billing rules. Rather than relying solely on lower-value export credits, a battery helps you use more of the electricity your own panels generated. It can also provide backup power during an outage when it is designed and installed with that purpose in mind.
Battery storage is not automatically the right choice for every property. It adds upfront cost, and the appropriate battery capacity depends on energy usage, solar production, desired backup loads, electrical equipment, and budget. A property seeking bill management may need a different design than a household that wants refrigeration, lighting, internet, medical equipment, and other essential circuits supported during an outage.
For commercial properties, the case may also include demand patterns, operating hours, and whether daytime loads already consume most of the solar production. A business that operates during sunny hours may gain significant value from solar without needing a large battery. One with substantial evening use may benefit from evaluating storage more closely.
System Size Matters More Than Ever
Under older assumptions, homeowners sometimes focused on producing as much annual electricity as possible. Today, oversized systems can export a larger share of production at lower values. That does not mean larger is always wrong. A growing family, a planned EV purchase, electric heating upgrades, a pool, or future business equipment can justify additional capacity.
It does mean the system should be designed around the property’s actual and expected energy profile. A careful design looks at past utility usage, roof orientation, shading, local climate, time-of-use patterns, major equipment, and future electricity needs. It also considers how much energy is likely to be consumed while the solar system is producing.
For a new construction or development project, solar planning works best when it is coordinated early with electrical service, roofing, EV charging, battery placement, and mechanical systems. Decisions made before construction can avoid costly changes later and create a cleaner, more integrated energy plan.
Net Metering Does Not Mean Off-Grid Power
A standard grid-tied solar system usually shuts down during a utility outage, even if the sun is shining. This safety feature prevents solar electricity from feeding into power lines while utility crews may be working on them. Net metering or net billing does not, by itself, provide backup power.
To keep selected equipment operating during an outage, a system generally needs battery storage and properly configured backup equipment. An off-grid system is a separate design approach that relies on solar, batteries, and often additional generation capacity without depending on the utility grid. Each option serves a different goal: grid-tied solar supports bill reduction, battery-backed solar can add resilience, and off-grid solar is designed for properties without practical utility access.
Getting an Accurate Savings Projection
The most reliable way to evaluate solar is to look beyond a single advertised savings number. Ask how the proposal accounts for your utility territory, current rate schedule, expected export credits, annual production, system degradation, financing terms, and future energy changes. If a battery is included, ask what loads it will support and how long it may support them under realistic conditions.
A quality solar contractor should make these trade-offs clear. Universal Solar Inc. designs systems around the way each Sacramento-area property uses energy, rather than treating every roof and utility bill the same. That approach helps align solar capacity, battery options, and backup priorities with the outcome you want: lower operating costs, greater energy independence, dependable backup power, or a combination of all three.
Your energy bill is a record of when your property needs power. Bring that information to a solar consultation, along with plans for EV charging, home additions, new appliances, or business growth. A tailored design can turn those plans into a solar system that keeps working for your property long after installation day.
