Solar Panel Cost in Mountain View, CA (2026): $4.51/W Reported
By Chad SimpsonUpdated 9 sources citedMountain View, Santa Clara County
Mountain View homeowners who bought their own solar systems reported a median of $4.51 per watt between January 2025 and May 2026, across 132 systems. The middle half paid $2.98 to $6.26 per watt.
A 6.06 kW system, the median size connected in Mountain View in 2025, comes to about $27,300 at that median, or $18,100 to $37,900 across the middle half.
Those are reported costs, not a quote, and no federal credit comes off a Mountain View system finished in 2026: 26 U.S.C. §25D does not cover one whose installation is completed after December 31, 2025 (state and federal rules).
- Median reported cost
- $4.51/W
- Mountain View addresses, 132 systems
- Middle half
- $2.98 to $6.26/W
- 25th to 75th percentile
- Typical 6.06 kW system
- $27,300
- 6.06 kW × $4.51/W, before any incentive
- Same system, middle half
- $18,100 to $37,900
- size: Mountain View addresses, 2025 median
Source: California Distributed Generation Statistics (CPUC), Interconnected Project Sites data set, data through May 31, 2026, checked September 24, 2026. Homeowner-owned, solar-only systems of 1 to 25 kW; leases, PPAs and battery systems are left out (method). The CPUC notes these costs are not verified by the government.
California Rate Relief is a referral service. We are not a licensed contractor.
What a solar permit costs in Mountain View
Mountain View does not publish a dollar figure for a residential solar permit. Whatever it charges, Government Code §66015 limits a city to $450 for a home system up to 15 kW, plus $15 per kW above that, unless it adopts a written finding that its cost is higher.
- What Mountain View publishes: Mountain View's Solar Permits page does not state a dollar figure, and the City's Building Permit Fees page refers to that page for solar. For systems filed through ePermitsMV, the City collects the fee online before the permit issues.
- How to file: Yes. Contractors registered with SolarAPP+ can file roof-mounted or building-integrated solar on a single-family home, with or without battery storage or a service panel upgrade, and the permit issues automatically; it is still a City of Mountain View building permit. A City building inspector then checks the installation at a site inspection the contractor schedules at least one business day after approval. Multifamily, commercial and other single-family systems go through ePermitsMV with plans.
- Automated permit platform: SolarAPP+
Sources: City of Mountain View, Solar Permits, checked September 23, 2026; City of Mountain View, Building Permit Fees (Solar Permits (Photovoltaic): see the Solar Permits page), checked September 23, 2026; California Energy Commission, Residential Solar Permitting Program data (SB 379 platform status as self-reported by each jurisdiction; data last updated August 3, 2026), checked September 23, 2026; Gov. Code §66015, checked September 24, 2026. Mountain View in the California Solar Cost Index sets this fee beside every other city's.
Solar in Mountain View: installs, leases and batteries
Home solar systems connected at Mountain View addresses: 196 in 2021, 226 in 2022, 372 in 2023, 236 in 2024 and 215 in 2025. So connections peaked in 2023 and 2025 ran 42% below that peak. Another 100 were connected from January to May 2026.
Of the 215 systems connected in Mountain View in 2025, 22% were leased or on a PPA, so a solar company owns them, and 78% belonged to the homeowner. 40% had a battery, less often than the 55% statewide. The median Mountain View system was 6.06 kW, and 66 companies connected at least one.
| Mountain View | Santa Clara County | Statewide | |
|---|---|---|---|
| Systems connected in 2025 | 215 | 6,416 | 145,404 |
| Leased or on a PPA | 22% | 30% | 45% |
| With a battery | 40% | 54% | 55% |
| Median system size | 6.06 kW | 6.48 kW | 6.15 kW |
| Median reported cost | $4.51/W (132) | $4.58/W (3,143) | $4.14/W (58,628) |
| Companies connecting systems | 66 | 310 | 2,475 |
Source: CPUC DG Stats, data through May 31, 2026. Counts are home systems given permission to operate each year; a city means the service city on the application.
Your utility: PG&E
Mountain View is billed by Pacific Gas and Electric Company (PG&E). PG&E's average residential rate is 33.7¢/kWh (June 2026 (unchanged since March 2026); rate tracker).
Silicon Valley Clean Energy supplies generation for many Mountain View addresses while PG&E delivers and bills; your bill shows which. Source: Silicon Valley Clean Energy, About (communities served).
Before you compare proposals
The Mountain View project checks that change the decision
Mountain View's SolarAPP+ route covers a single-family rooftop system even when a battery or a service panel upgrade is part of the job, so most home projects get an automatic permit.
Ask the same three questions
- Is the system roof-mounted or building-integrated on a single-family home, so it qualifies for SolarAPP+ instead of a full plan submittal in ePermitsMV?
- What is the City's permit fee in the quote? Mountain View does not publish the amount.
- Does the savings estimate follow Silicon Valley Clean Energy’s monthly settlement for generation and PG&E’s annual true-up for delivery?
Local checks
Batteries and panel work included
Registered contractors can take roof-mounted or building-integrated single-family solar through SolarAPP+ with or without energy storage or an electrical service panel upgrade. The permit issues automatically and is a City of Mountain View building permit.
Inspection a business day out
The contractor schedules the site inspection for at least one business day after approval, and a City building inspector checks the design and installation then.
Everything else through ePermitsMV
Multifamily, commercial and any single-family system outside SolarAPP+ are filed through ePermitsMV with building plans, and the fee is collected before the permit issues.
SVCE's payouts
Silicon Valley Clean Energy values each exported kWh at the grid price at the moment it leaves the house. Balances of at least $100 are paid out by check, capped at $5,000, and anything smaller stays on the bill as credit.
Related decisions
Local sources and limits
- City of Mountain View — Solar Permits — verified 2026-09-23. SolarAPP+ for roof-mounted or building-integrated PV on single-family homes, with or without energy storage or a service panel upgrade; permit issued automatically and still a City building permit; site inspection scheduled by the contractor at least one business day after approval; all other solar through ePermitsMV with plans and fee paid before issuance. No fee amount stated.
- City of Mountain View — Building Permit Fees — verified 2026-09-23. Lists “Solar Permits (Photovoltaic)” with no amount, pointing to the Solar Permits page.
- Silicon Valley Clean Energy — Solar Billing Plan — verified 2026-09-23. Export credits reflect the grid value at the time of export; GreenPrime customers get an extra $0.017 per kWh on monthly excess; SVCE generation settled monthly, PG&E delivery at PG&E’s annual true-up; cashout of $100 or more by check up to $5,000, smaller as bill credit; SVCE pays PG&E’s NSC rate on cumulative kWh.
- California Energy Commission — Residential Solar Permitting Program data (SB 379) — verified 2026-09-23. Self-reported platform status per jurisdiction, data last updated August 3, 2026; the CEC says it does not certify compliance. Rows used: Chico (deadline Sept 2023) and Arcata (deadline Sept 2024), both without a platform; Pasadena, Anaheim, San Jose and Tracy (custom platform); Santa Clarita, Vallejo, Corona and Ontario (Symbium); Escondido, Monterey, Modesto, Mountain View and Huntington Beach (SolarAPP+).
Before you sign
In Mountain View the middle half of reported costs spans $2.98 to $6.26 per watt, and roof, panel work, equipment and contract terms explain most of that gap. California Solar Tax and Permit Rules for 2026 covers them, and the tax, lease and disclosure rules a Mountain View contract follows.
Frequently asked questions
How much does solar cost in Mountain View?
About $27,300 for a 6.06 kW system, at the $4.51 per watt median that Mountain View owners reported (132 systems, January 2025 to May 2026; middle half $2.98 to $6.26). Source: CPUC DG Stats. No federal credit applies to a Mountain View system finished in 2026.
What does a solar permit cost in Mountain View?
Mountain View states no single current figure (no figure published, checked September 23, 2026); Gov. Code §66015 caps it at $450 up to 15 kW unless the city adopts a written finding.
Which utility serves Mountain View?
Pacific Gas and Electric Company (PG&E). Its average residential rate is 33.7¢/kWh, as of June 2026 (unchanged since March 2026).
Sources
- California Distributed Generation Statistics (CPUC), Interconnected Project Sites data set, data through May 31, 2026 — checked September 24, 2026
- CPUC, California Solar Consumer Protection Guide — checked September 24, 2026
- 26 U.S.C. §25D(h) and (e)(8)(A), residential clean energy credit — checked September 24, 2026
- Mountain View solar permitting — City of Mountain View, Solar Permits — checked September 23, 2026
- City of Mountain View, Building Permit Fees (Solar Permits (Photovoltaic): see the Solar Permits page) — checked September 23, 2026
- California Energy Commission, Residential Solar Permitting Program data (SB 379 platform status as self-reported by each jurisdiction; data last updated August 3, 2026) — checked September 23, 2026
- California Government Code §66015(a), residential solar permit fees — checked September 24, 2026
- Silicon Valley Clean Energy, About (communities served) — checked September 23, 2026
- PG&E average residential rate — CPUC Public Advocates Office, Q2 2026 Electric Rates Report, p.8, 20 — checked September 24, 2026
The tax, contract and permit rules every California city shares, with their statutes: California Solar Tax and Permit Rules for 2026.
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