With average Southern California Edison (SCE) bills in Altadena climbing to around $291, many homeowners are looking for relief. But the rules for solar have changed. Exporting surplus solar power to the grid no longer provides the same 1-for-1 credit it once did, making it crucial to understand how to get the most value from a system installed in 2026. The key is maximizing the amount of solar energy you use directly in your home.
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2026 Solar & Battery Costs in Altadena
Here are the estimated costs for a typical 7.2 kW system designed to offset a significant portion of an average Altadena household's electricity usage. These figures are based on early 2026 pricing and do not include the federal tax credits that have expired for new residential systems.
- Solar-Only System (7.2 kW): The estimated gross cost is around $18,360.
- Solar + Battery System (7.2 kW panels with a 10 kWh battery): The estimated gross cost is approximately $33,360.
Adding a battery increases the upfront cost, but as you'll see, it plays a critical role in boosting your long-term savings under current SCE rules.
Incentives & Tax Credits
California Solar Incentives for 2026
While the 30% federal investment tax credit is no longer available for most homeowners installing systems in 2026, California still offers a significant financial benefit:
- Property Tax Exclusion: In California, adding a solar system does not increase your property taxes. The value added to your home by the solar installation is excluded from your property's assessed value, a benefit currently in place for systems installed through at least mid-2026.
An owned solar system can also be an attractive feature for potential buyers, potentially supporting your home's resale appeal down the road. The primary financial driver, however, remains the direct savings achieved by offsetting SCE's high electricity rates.
Net Metering: Southern California Edison Co
Net Billing (low export)
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Understanding Export Rates with Southern California Edison
The structure governing solar compensation in Altadena is a net billing tariff. This isn't the old 1-for-1 net metering. Here’s the simple breakdown: the power you pull from the grid is expensive, but the excess power you send back is bought by the utility for a much lower, wholesale-based rate. This is why self-consumption is so important. Using your solar power directly—or storing it in a battery for later—provides far more value than selling it back to SCE for pennies on the dollar.
Projected Savings
How Solar Savings Work with SCE's Net Billing
Under SCE's current net billing tariff, the electricity you export to the grid is valued at a much lower rate (modeled here at around $0.11/kWh) than the retail rate you pay for electricity (around $0.32/kWh). This difference makes a battery a powerful financial tool.
- A solar-only system is modeled to save an Altadena homeowner around $2,216 annually, with an estimated payback period of 7.6 years. It achieves this by offsetting your energy use during the day.
- A solar and battery system significantly increases those savings to an estimated $3,308 annually. Instead of exporting cheap power, the battery stores your excess solar energy. You can then use that stored power in the evening, avoiding SCE's high peak rates entirely. While the payback period is slightly longer at 8.3 years, the total savings over the system's life are substantially higher.
Furthermore, generating your own power offers a hedge against rising utility costs. If grid electricity becomes more expensive over time, your rooftop generation becomes even more valuable.