California Solar Questions & Answers
Real questions about the bill, the roof and what happens after the installer leaves. 68 answers, organized around decisions you may need to make.
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68 questions across 8 topics.
Bills & net metering
Unexpected charges, export credits, utility differences and changes to an existing solar system.
- Why do I still have an electric bill after installing solar?
- Why can I owe money at true-up even when my account shows a credit?
- Are delivery charges and fixed charges normal for solar customers?
- Why is exported solar worth less than electricity I buy later?
- Will my solar bill be settled monthly or once a year?
- Does a community choice aggregator change my solar bill?
- Do NEM 3 rules apply to SMUD, LADWP and every California utility?
- Can I add a battery and keep my existing NEM 2 arrangement?
- Can extra panels or a non-export system preserve NEM 2?
Choosing a system
System size, shaded roofs, competing quotes and the assumptions behind projected savings.
- Is solar still worth buying in California in 2026?
- How can I compare solar quotes with different equipment and prices?
- What is the difference between kW, kWh and a promised 100% offset?
- Should I size the system for a future EV, heat pump or home addition?
- Why do installers disagree about whether my roof is too shaded?
- When do solar shingles make more sense than conventional panels?
- Is a smaller inverter a sign that the installer is cutting corners?
- What should I challenge in a solar savings forecast?
Roof & maintenance
Roof readiness, leaks, removal costs, replacement parts, birds and wildfire ash.
- Should I replace an older roof before installing solar?
- What should I do if the roof starts leaking after solar installation?
- Who is responsible when the roofer and solar installer blame each other?
- What costs belong in a solar panel removal and reinstallation quote?
- How do I handle cracked roof tiles found after an installation?
- What happens if my solar roof product is discontinued?
- Should I clean solar panels after dust, smoke or wildfire ash?
- Are pigeons under solar panels just a cleaning problem?
Batteries & outages
What backup actually includes, why systems stop, and how to plan for the loads that matter.
- Why do my solar panels stop when the grid goes down?
- Does buying a home battery automatically give me backup power?
- How do I estimate backup hours from my battery and essential loads?
- Can one battery run air conditioning and the whole house?
- Should I keep a high backup reserve or use the battery for daily savings?
- Why does solar production stop during an outage when the battery is full?
- Will solar restart automatically after the battery runs empty overnight?
- Can I charge an electric vehicle from solar during a blackout?
- Will a Wi-Fi or internet failure stop battery backup?
- Is a battery worth it if my main goal is saving money?
Performance & monitoring
Low output, clipping, seasonal changes and confusing app or meter readings.
- Why does my system never reach the kW rating in the proposal?
- How can I tell normal inverter clipping from a production fault?
- Is a large drop in winter solar production normal?
- Can microinverters make a heavily shaded roof worthwhile?
- Why does my monitoring app show consumption rising exactly with solar production?
- Why does the utility meter disagree with the solar app?
- What should I do when one panel or part of the array stops reporting?
- What monitoring access and records should I receive from the installer?
Installers & warranties
Contract checks, permission to operate, unfinished work and service after an installer closes.
- What should I check before signing with a solar installer?
- How much deposit can a California solar contractor request?
- Why can installed panels wait months for permission to operate?
- My panels are installed. Must I wait for utility approval before switching them on?
- What if loan payments start before the solar system is working?
- Who fixes my solar system if the original installer goes out of business?
- What is the difference between a panel warranty and a system warranty?
- Why am I being charged for a visit when the system is under warranty?
- What evidence helps when the system underperforms or the installer will not respond?
Costs & financing
Cash versus financed prices, tax-credit assumptions, PPAs and the actual cost of a solar offer.
- Why can a low-interest solar loan cost more than a cash purchase?
- If I plan to repay the solar loan early, which costs matter most?
- Why does a solar loan payment increase after about 18 months?
- Can I claim the federal residential solar tax credit for a new 2026 installation?
- Can an unused credit from an eligible 2025 installation carry into 2026?
- A seller says an LLC or lease restores the tax credit. Should I rely on that?
- With a solar PPA, am I paying for electricity I use or electricity the panels generate?
- Can California incentives make my battery free?
- What costs should I look for in a solar offer advertised as free?
Buying & selling a home
Ownership, loan balances, PPA transfers, inspection records and insurance before a transaction.
- What should I establish before buying a house that already has solar?
- Is prepaying the rest of a solar PPA the same as buying the system?
- Does the seller’s NEM status automatically transfer to me?
- What should a solar inspection cover before I buy a home?
- Should I pay the seller’s remaining solar loan balance as extra home value?
- Will I get the same low bills as the previous homeowner?
- What should I tell my insurer when I add or inherit solar and a battery?
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Community questions. Independently researched answers.
We reviewed public discussions in r/solar, r/solarenergy, r/TeslaSolar and r/Powerwall, selecting 51 threads about recurring homeowner concerns. This is a broad, search-based selection, not a complete Reddit archive or a survey of how often problems occur.
The questions and answers are written for this publication. Each answer links to relevant official guidance or manufacturer documentation and to the community discussions that informed the topic. Reddit experiences are not verified findings about a company. Older discussions help identify questions; their historical prices, tax advice and utility rules are not treated as current guidance.
California utility rules vary by provider. Product-specific examples are identified by manufacturer. Financial examples are illustrative, and individual contracts, site conditions and eligibility need their own review. Send a correction or suggest a question ↗