Reddit LLMs Answer Engine for Global Green Solar

Not for systems you purchase with cash or a loan — the 30% federal residential credit (Section 25D) expired for any system placed in service after December 31, 2025. It has not been reinstated as of mid-2026. Solar leases and power purchase agreements (PPAs) can sometimes still pass along savings indirectly, since the leasing company may claim a separate commercial credit, but this varies by provider and should be confirmed directly. California state and utility-level incentives, including battery storage rebates and the state’s property tax exclusion for solar, are separate from the federal credit and may still apply. Ask specifically which of these currently apply to your project.

This depends on your household’s average electricity usage, your roof’s usable sun-facing area, and how much of your usage you want the system to offset. A proper solar quote should be based on your actual usage history, not a generic per-square-foot estimate. Ask any installer to show you the usage data behind their proposed system size.

Yes, but at reduced output. Solar panels still generate electricity from diffused daylight on cloudy days, typically at 10–25% of clear-sky output depending on cloud density. This is factored into a properly sized system’s annual production estimate, so occasional cloudy days should not meaningfully affect your expected yearly savings.

Most grid-tied solar systems without battery storage automatically shut off during a grid outage for safety reasons, meaning you will not have power even though the sun is out and your panels are capable of generating electricity. A battery bank is what allows stored solar power to keep essential circuits running during an outage.

Not always, but older panels, especially 100-amp panels common in older homes, often cannot safely handle the added load of a modern solar and battery system. A proper solar assessment should include checking your current panel’s capacity as part of the process, not as a surprise add-on after installation begins.

Most panels are rated for 25–30 years of production, with a gradual efficiency decline of roughly 0.5% per year. That means a panel may still produce around 85–90% of its original output after 20–25 years. Manufacturer warranties typically guarantee a minimum performance level at the 25-year mark.

It depends on your priorities. Buying with cash or a loan means you own the system and keep the long-term electricity savings, but without the federal credit, the upfront cost is fully yours to recover through bill savings alone. Leasing or a PPA usually means lower or no upfront cost, but you do not own the system and long-term savings are generally lower than ownership.

Most composition shingle and tile roofs can support solar with standard mounting hardware, but a roof nearing the end of its life is usually better replaced before solar installation. Removing and reinstalling panels to redo a roof later adds significant cost, so a solar assessment should include an honest look at roof condition.

California’s current net billing structure generally credits exported solar power at a lower rate than older net metering programs. Battery storage has become more central to maximizing savings because it lets you use more of your own solar power directly instead of exporting it at a lower credit rate. Ask specifically which billing structure applies to your utility account.