San Marcos Homeowners
Have Built Everything.
Why Is SDG&E Still Running the Budget?
San Marcos homeowners pay $300 or more per month to SDG&E — and rates have been approved to keep rising through 2027. At a median home value of $868,000, you've made every other smart financial move. Solar with battery storage is the one that takes SDG&E out of the equation for good.
We'd been meaning to look into solar for three years. Our SDG&E bill hit $340 last August and that was it. Ed had a proposal in front of us in 48 hours — real numbers, no fluff. We're on a lease, nothing out of pocket, and our bill is under $40. I wish we hadn't waited.
Why Are SDG&E Bills in San Marcos So High — and What Can You Actually Do About It?
San Marcos homeowners pay $300 or more per month to SDG&E depending on home size and usage — with the average 6.65 kW system household running well above the county average. SDG&E's bundled residential rate hit 45.7¢ per kilowatt-hour in January 2026 — the highest of any major investor-owned utility in the continental United States. The California Public Utilities Commission has already approved rate increases through 2027, with wildfire cost recovery hearings still pending. For San Marcos homeowners at a median property value of $868,000, this is the one recurring cost that hasn't been brought under control.
SDG&E Rate Escalation — What San Marcos Homeowners Have Paid & Will Pay
| Year | Avg. Monthly Bill (San Marcos) | Approx. Rate (¢/kWh) | Annual Cost | vs. 2020 |
|---|---|---|---|---|
| 2020 | ~$185 | ~28¢ | ~$2,220 | — |
| 2022 | ~$235 | ~33¢ | ~$2,820 | +$600/yr |
| 2024 | ~$285 | ~41¢ | ~$3,420 | +$1,200/yr |
| 2026 (now) | ~$310 | 45.7¢ | ~$3,720 | +$1,500/yr |
| 2028 (projected) | ~$360+ | ~53¢+ | ~$4,320+ | +$2,100+/yr |
Sources: EnergySage San Marcos electricity data · SDG&E Total Electric Rates · CPUC GRC Decision 24-12-074. 2028 figure projected at CPUC-authorized 3% annual base increase plus wildfire recovery costs.
Staying with SDG&E vs. Going Solar in San Marcos — 10-Year Comparison
| Factor | SDG&E (No Solar) | Solar + Battery (Lease) |
|---|---|---|
| Monthly energy cost | $300+ — rising annually | $85–$125 fixed lease |
| Rate control | None — CPUC sets increases | Locked for lease term |
| 10-year energy spend | $44,000+ (with escalation) | ~$12,000–$15,000 |
| Outage protection | None | Powerwall backup included |
| ITC / 30% savings | Not applicable | Passed through on lease (48E) |
| Home value impact | Neutral | +$15,000–$25,000 typical |
| Upfront cost | $0 | $0 down available |
Lease savings based on current SDG&E DR-SES rate schedule. ITC pass-through available under IRC §48E through 2027 — system owner (leasing company) claims the credit and passes 30% savings to homeowner upfront. No personal tax liability required. Verify current incentives at energy.ca.gov.
The calculation is straightforward: At $310 per month, San Marcos homeowners are sending $3,720 per year to SDG&E with approved increases locked in through 2027. A solar lease fixes your energy cost today — and at a median home value of $868,000, it also adds a documented asset to the property you've already invested in.
How Does Solar Work for San Marcos SDG&E Customers in 2026?
Solar replaces electricity you buy from SDG&E with power your roof generates for free. San Marcos sits in one of the strongest solar corridors in North County San Diego — strong year-round sun, warm inland temperatures, and minimal coastal overcast. The average San Marcos home needs a 6.65 kW system to offset annual usage. In 2026, pairing that system with a battery is what makes the numbers decisively better under NEM 3.0.
What NEM 3.0 Means for San Marcos Homeowners
California's NEM 3.0 net metering rule reduced the export credit SDG&E pays for excess solar sent back to the grid — down roughly 75% from NEM 2.0 rates. Solar-only systems that export excess power earn far less credit than before. The solution is storage: a Powerwall captures excess energy during the day and discharges it during the 4–9 PM peak window when SDG&E charges up to 65.87¢/kWh. San Marcos homeowners who lock into a prepaid lease in 2026 get the 30% commercial ITC passed through upfront — no personal tax liability required — under IRC §48E, available through 2027. The full 25-year projected savings for a typical San Marcos home: over $102,000.
How a Solar Installation Works in San Marcos — Start to Finish
Energy Review — We Analyze Your SDG&E Bills
We pull 12 months of usage data from your SDG&E account to size your system correctly. San Marcos homes average a 6.65 kW system — but your number depends on your actual usage, roof orientation, and whether you have or plan to add an EV. No guesswork, no oversizing to inflate the sale.
Custom System Design + Savings Estimate
You receive a full proposal showing panel count, battery size, projected monthly savings, and all three financing options — prepaid lease, monthly lease, and loan. We model NEM 3.0 export rates and SDG&E's TOU schedule so the numbers are accurate, not optimistic projections.
Permitting — City of San Marcos + SDG&E Interconnection
San Marcos requires both a building permit and an electrical permit for rooftop solar, with a typical 3 business day approval window and $250–$500 in fees. Our installation partner files all permits directly with the city and handles SDG&E interconnection paperwork — nothing lands on your plate.
Professional Installation — 1 to 3 Days
A certified crew installs your panels, inverter, and Powerwall battery. All work is completed CSLB-licensed under Mars Home Solutions (CSLB #1065773). San Marcos's mix of newer tile-roof construction and older ranch homes are both accommodated — we assess roof condition before any proposal.
PTO — Permission to Operate from SDG&E
Once SDG&E grants Permission to Operate, your system goes live. Your roof starts generating power and your bill drops. Most San Marcos customers see their first significantly reduced SDG&E statement within 30 days of PTO.
Why San Marcos Homeowners Need a Battery — Not Just Panels
SDG&E's time-of-use rates charge up to 65.87¢ per kWh during the 4–9 PM peak window — right when panels stop producing at sunset. A Powerwall charges during peak solar hours and discharges during the expensive evening window, cutting your bill at its highest point. San Marcos's warm inland climate also means higher summer AC loads — a battery ensures you're running on stored solar rather than full-price grid power during those peak cooling hours. Under NEM 3.0, solar without storage leaves an estimated 40% of potential savings unrealized.
Night Coverage
Power your home after dark on stored solar — no peak-rate SDG&E electricity needed.
Outage Protection
Santa Ana wind events and planned outages happen in North County. A Powerwall keeps critical loads running automatically.
Summer AC Coverage
San Marcos's warm inland climate drives high summer AC loads. Store solar during the day, run AC on stored power at night.
ITC Pass-Through
On a prepaid lease, the 30% commercial ITC is passed to you upfront — no personal tax liability required.
No Solar vs. Solar Only vs. Solar + Battery in San Marcos — 2026
| Factor | No Solar | Solar Only | Solar + Battery ✓ |
|---|---|---|---|
| Monthly SDG&E bill | $310 avg. | $90–$150 | $25–$70 |
| NEM 3.0 export value | N/A | Low (~5¢/kWh credit) | Maximized — store & self-consume |
| Peak-hour protection (4–9 PM) | None — pay 65.87¢/kWh | None after sunset | Full — Powerwall discharges |
| Summer AC load coverage | Full grid rate all season | Partial — daytime only | Stored solar covers evening cooling |
| Outage backup | None | None (grid-tied only) | Yes — automatic islanding |
| ITC savings (lease) | None | Partial | Full 30% passed through |
| 25-year projected savings | $0 — paying full rate | ~$60,000–$75,000 | $102,000+ (EnergySage data) |
NEM 3.0 export rates per CPUC NEM 3.0 decision. SDG&E peak-hour rate per SDG&E DR-SES TOU rate schedule. 25-year savings per EnergySage San Marcos data. ITC pass-through under IRC §48E through 2027.
See Exactly How Much a Solar System Would Save You in San Marcos
Enter your SDG&E bill and get a real savings estimate based on your home and usage — no salesperson, no pressure.
📋 Get My Free EstimateWhat San Marcos Homeowners Ask Before Going Solar
San Marcos buyers do their research — and they should. Here are the questions we hear most, answered directly with no sales spin.
"I want to research this more before committing to anything."
That's a reasonable instinct — solar is a 25-year decision and you should understand what you're signing. Here's what the research actually shows: EnergySage data puts the 25-year savings for a typical San Marcos home at $102,226, based on real quote data from local installers. The CPUC has approved SDG&E rate increases through 2027, with wildfire cost recovery still pending. The longer the research window, the more months of full-price SDG&E retail accrue. A free consultation gives you the specific numbers for your home — no commitment required, no pressure to decide on the call.
✅ The numbers are real — a free consultation shows you exactly what your home qualifies for"My HOA has rules about solar. Will I be able to install panels?"
California's Solar Rights Act (Civil Code §714) significantly limits what an HOA can restrict regarding solar installations. An HOA cannot outright prohibit solar panels — it can only impose reasonable restrictions that don't increase system cost by more than $1,000 or reduce energy production by more than 10%. In practice, most San Marcos HOAs permit solar with standard placement on the main roof facing the street side or rear. Our installation partner handles HOA coordination and architectural review submissions as part of the process — we've navigated this successfully across dozens of planned communities in San Diego County.
✅ California law protects your right to install solar — HOAs cannot block it outright"NEM 3.0 changed everything. Is solar still a smart financial decision in San Marcos?"
NEM 3.0 reduced what SDG&E pays for excess solar exported to the grid. But it did not change the math for solar paired with battery storage. A Powerwall captures that excess energy instead of exporting it, then discharges during the 4–9 PM peak window when SDG&E charges up to 65.87¢/kWh. The prepaid lease also passes the 30% commercial ITC through to you upfront under IRC §48E, available through 2027 — no personal tax liability required. EnergySage's own modeling puts the San Marcos solar payback period at approximately 4 years on a cash purchase, with 25-year savings over $102,000.
✅ Solar + battery remains a strong financial decision in San Marcos under NEM 3.0"What if I sell my house in a few years? Does the solar system complicate the sale?"
In San Marcos's market — with a median property value of $868,000 and rising — a solar system with a Powerwall is a documented financial asset, not a liability. Studies consistently show homes with solar sell faster and for more than comparable non-solar homes, with premiums of $15,000–$25,000 in San Diego County. On a prepaid lease, the system transfers to the buyer with no assumption required — it's paid up, like any other home improvement. On a monthly lease or loan, the buyer assumes the agreement or it can be paid off at closing. Our installation partner has completed hundreds of San Diego County transfers without a deal falling through over solar.
✅ Solar is a documented asset in a $868K market — not a complication"My roof is only 10–12 years old. Do I need to replace it before going solar?"
A 10–12 year old roof in good condition is typically fine for a 25-year solar system. The key question is remaining useful life — if your roof has 15+ years left, panels go on as-is. If it's closer to replacement, combining a re-roof with the solar install is the smartest move because it eliminates future removal and reinstallation labor costs. Solar With Watts works with licensed roofing contractors and can bundle a roof assessment into the same site visit at no additional charge. San Marcos's mix of newer tile-roof construction (92078) and older builds (92069) means we assess every roof individually — no assumptions, no surprises at install.
✅ We assess your roof honestly before any proposal — no surprises at installNot in San Marcos? We Serve All of San Diego County and Beyond.
Solar With Watts installs across SDG&E, PG&E, SCE, and SMUD territories throughout California. Find your city and see local savings data.
Frequently Asked Questions About Solar in San Marcos, CA
Detailed answers to the questions San Marcos SDG&E customers ask most before going solar. Everything you need to make a confident, informed decision.
According to EnergySage's San Marcos data, the average San Marcos homeowner saves $102,226 over 25 years by going solar. On a monthly basis, a properly sized solar and battery system typically reduces a $310/month SDG&E bill to $25–$70 per month on a prepaid lease — saving $240–$285 per month from day one. Your exact savings depend on your SDG&E usage, roof orientation, and system size.
As of early 2026, the average San Marcos solar system costs $16,055 before incentives for a 6.65 kW system at $2.42 per watt — the typical size to offset a San Marcos home's annual usage. On a prepaid lease, the upfront cost is $0 and the 30% commercial ITC under IRC §48E is passed directly to you by the leasing company. Use our solar savings calculator to get a number specific to your home and SDG&E bill.
Yes. California's Solar Rights Act (Civil Code §714) limits HOA restrictions on solar — an HOA cannot prohibit solar outright, and can only impose conditions that don't increase system cost by more than $1,000 or reduce output by more than 10%. Most San Marcos HOAs permit standard rooftop solar installations. Our installation partner handles HOA architectural review submissions as part of the installation process at no additional charge to you.
San Marcos solar customers are on NEM 3.0, California's current net billing policy. Under NEM 3.0, SDG&E credits excess solar exported to the grid at roughly 75% less than under NEM 2.0. A Powerwall battery is the solution: store that excess energy during the day and discharge it during the 4–9 PM peak window when SDG&E's rates are highest. Solar plus storage maximizes savings under NEM 3.0 — solar-only systems still save money but leave significant savings on the table.
The City of San Marcos requires both a building permit and an electrical permit for rooftop solar installations. Permit fees typically run $250–$500, and approval typically takes around 3 business days for standard residential systems under 10 kW. Systems 10 kW and above require a PE stamp and standard plan review, which takes longer. Our installation partner files all permits directly with the City of San Marcos and coordinates the SDG&E interconnection request — you don't need to chase a single signature.
From signed contract to Permission to Operate, most San Marcos solar installations take 6 to 10 weeks. The physical installation is completed in one to three days. The majority of the timeline is permitting with the City of San Marcos and SDG&E interconnection review — both handled entirely by our installation partner. You won't need to take time off work or manage any part of the paperwork process.
The primary 2026 incentive for San Marcos homeowners on a prepaid or monthly lease is the 30% commercial ITC under IRC §48E — the leasing company claims it and passes the savings to you upfront with no personal tax liability required, available through 2027. For cash or loan purchases, the 25D residential ITC expired December 31, 2025 — consult a tax advisor. SDG&E customers may also qualify for California's SGIP battery rebate program. Verify current incentive availability during your free consultation.
San Marcos is one of the strongest solar markets in North County San Diego. The city's warm inland climate and minimal coastal cloud cover produce strong year-round solar output — significantly more than coastal communities like Oceanside. South and west-facing roof sections perform best. San Marcos's newer tile-roof construction in areas like San Elijo Hills and Twin Oaks is well-suited for solar. Older ranch-style homes in the 92069 corridor are assessed individually for structural compatibility. We conduct a full site assessment before any proposal.
No. California's active solar energy system property tax exclusion means rooftop solar does not trigger a property tax reassessment in San Marcos or anywhere in California. Your taxes stay the same even though a solar system typically adds $15,000–$25,000 in appraised market value. At San Marcos's median property value of $868,000, that's a meaningful equity gain with zero tax consequence. Verify the current exclusion at the California State Board of Equalization.
Start with our solar savings calculator — enter your SDG&E bill and get a San Marcos-specific savings estimate in under two minutes. No personal information required. If the numbers make sense, book a free 30-minute energy consultation directly on our calendar. No sales pressure, no obligation, no door-to-door follow-up. We serve all of San Diego County — see our San Diego County solar hub for every city we cover.
More Solar Resources for North County San Diego Homeowners
San Marcos: You've Built Everything. This Is the Last Piece.
$102,000 in projected 25-year savings. $0 down. SDG&E locked out of your budget for good. The decision that takes two minutes to start has been waiting long enough.