How much of my summer bill comes from air conditioning?

HVAC use typically makes up 40 to 50 percent of a household's electric bill during summer, depending on usage. Because your AC works hardest in the afternoon, it lines up closely with peak solar production.

How often should I check my solar monitoring app?

Checking at least twice a month is a good habit. It lets you spot production drops or connection issues early and helps you understand how your daily habits affect your usage.

What temperature should I set my smart thermostat to in summer?

A common range is 73 to 78 degrees when you are home and around 85 degrees when away. Each degree you raise the setting saves roughly 1 to 3 percent on cooling costs.

What are time-of-use rates and why do they matter?

Many Southern California Edison customers are on time-of-use (TOU) plans, where electricity costs more in the late afternoon and evening. Shifting high-energy tasks outside of those peak hours can meaningfully lower your bill.

Will a battery help with summer bills, not just outages?

Yes. A battery can store solar power generated during the day and release it during expensive peak hours or, if the grid goes down, during an outage.

How much of my summer bill comes from air conditioning?

HVAC use typically makes up 40 to 50 percent of a household's electric bill during summer, depending on usage. Because your AC works hardest in the afternoon, it lines up closely with peak solar production.

How often should I check my solar monitoring app?

Checking at least twice a month is a good habit. It lets you spot production drops or connection issues early and helps you understand how your daily habits affect your usage.

What temperature should I set my smart thermostat to in summer?

A common range is 73 to 78 degrees when you are home and around 85 degrees when away. Each degree you raise the setting saves roughly 1 to 3 percent on cooling costs.

What are time-of-use rates and why do they matter?

Many Southern California Edison customers are on time-of-use (TOU) plans, where electricity costs more in the late afternoon and evening. Shifting high-energy tasks outside of those peak hours can meaningfully lower your bill.

Will a battery help with summer bills, not just outages?

Yes. A battery can store solar power generated during the day and release it during expensive peak hours or, if the grid goes down, during an outage. See our guide on solar battery backup for details.

Summer Home Energy Efficiency Tips for Southern California Solar Homeowners

Practical cooling, scheduling, and monitoring habits that lower summer electricity bills for homes with solar in Southern California.

July 15, 2025 7 min read Xero Solar

Southern California homeowners have some of the best conditions in the country for solar energy, long sunny days, mild winters, and utility rates that keep climbing. They also know the pain of a summer electric bill. When the marine layer burns off and temperatures climb, cooling costs can spike even for homes with home solar panels. The good news is that pairing solar with a few deliberate habits can meaningfully lower your summer bill.

Why Solar and Summer Cooling Are a Natural Match

Keeping a house cool during the summer is expensive. Your HVAC system is typically the single largest consumer of electricity in the home, and it works hardest during the afternoon, exactly when the sun is strongest and solar production peaks. That overlap means your panels are generating the most electricity right when your air conditioner needs it most, offsetting usage and lowering the amount you draw from the grid.

Top Cooling and Efficiency Strategies to Pair With Solar

Having solar does not mean your savings are maxed out. A handful of habits can stretch those savings further.

1. Check your solar monitoring app regularly

Checking your monitoring app at least twice a month helps you understand how much energy you are producing versus using. It also helps you catch connection issues or production drops early, keeping your system running at peak efficiency.

2. Install a smart thermostat and keep up with HVAC maintenance

Program the thermostat for 73 to 78 degrees when home and around 85 degrees when away
Each degree you raise the setting saves roughly 1 to 3 percent on cooling costs
Check and replace air filters regularly
Schedule annual tune-ups to clean coils and check refrigerant levels

3. Time your energy use around peak hours

Homeowners on Southern California Edison's time-of-use (TOU) plans often pay more for electricity in the late afternoon and evening. Running high-energy tasks before or after those windows can lead to real savings. It is also worth paying attention to plug loads, the electricity used by anything plugged into a wall outlet. Grouping devices on power strips makes it easier to shut them off when they are not in use.

4. Upgrade to energy-efficient appliances and LED lighting

Switching to LED bulbs, using an air fryer instead of a stove for quick meals, and choosing rechargeable cordless tools over corded ones all chip away at daily consumption. It also helps to deep clean large appliances at least once a year; a clogged refrigerator vent or dryer exhaust forces motors to work harder and draw more power.

5. Add a home battery backup system

For homeowners who want to go further, adding a battery to a home solar system stores excess solar power for use during expensive peak hours or during an outage. In Southern California, this is especially valuable: high summer demand, extreme heat, and wildfire risk can all contribute to rolling blackouts, making energy reliability as important as savings.

Just because you have solar does not mean your savings have maxed out. A few simple adjustments can cut costs, reduce grid reliance, and keep the house comfortable all summer.

Building a Summer Energy Routine

Combining solar production with efficient habits is less about any single change and more about consistency: checking your app, adjusting the thermostat, being mindful of when you run big appliances, and periodically auditing what is plugged in around the house. Together, these habits keep your electricity bill predictable even during the hottest months.

If you are ready to take the next step, whether that means adding a battery or getting help proactively monitoring your system, reach out to schedule a consultation and we can help find the right approach for your home.

Frequently asked questions

How much of my summer bill comes from air conditioning?: HVAC use typically makes up 40 to 50 percent of a household's electric bill during summer, depending on usage. Because your AC works hardest in the afternoon, it lines up closely with peak solar production.
How often should I check my solar monitoring app?: Checking at least twice a month is a good habit. It lets you spot production drops or connection issues early and helps you understand how your daily habits affect your usage.
What temperature should I set my smart thermostat to in summer?: A common range is 73 to 78 degrees when you are home and around 85 degrees when away. Each degree you raise the setting saves roughly 1 to 3 percent on cooling costs.
What are time-of-use rates and why do they matter?: Many Southern California Edison customers are on time-of-use (TOU) plans, where electricity costs more in the late afternoon and evening. Shifting high-energy tasks outside of those peak hours can meaningfully lower your bill.
Will a battery help with summer bills, not just outages?: Yes. A battery can store solar power generated during the day and release it during expensive peak hours or, if the grid goes down, during an outage. See our guide on solar battery backup for details.