Solar in Modesto: the city that is not on NEM 3.0

Modesto is not on NEM 3.0. It has a more direct, less forgiving trade.

MID is a publicly owned irrigation district established in 1887 and its electric territory covers greater Modesto and nearby communities. It is not a CPUC-jurisdictional investor-owned utility. So the state's Net Billing Tariff does not control a Modesto customer's new solar account. There is no reason to make a homeowner sit through a statewide NEM explainer before stating the local rule. MID's own history and service description is the starting point.

The current program is MID Net Metering 2.0. Energy used at the house offsets load at the retail rate. Residential production and usage are netted on an hourly basis. Any remaining excess generation does not reduce billed usage and does not sit in a bank for later. It becomes a negative dollar line on that billing cycle at $0.0760 per kWh. The MID NEM 2.0 schedule and solar FAQs say this without marketing language.

That makes Modesto a sizing discipline city. A kWh that runs an air conditioner, pool pump, dishwasher or EV load while the sun is out can displace retail energy. A kWh that leaves the property gets seven and a half cents. The panel count that looks heroic on an annual production graph can be an expensive way to create a small monthly credit. This is wrong when it is sold as “100 percent offset” without an hourly load discussion.

The local load profile is not trivial. Modesto City-County Airport has 3,214.7 cooling degree days at base 57, the highest cooling figure among this tranche's three Central and Bay Area cities. That makes a summer daytime load potentially valuable behind the meter. It does not mean every home has it. Retired occupants, work-from-home households, EV charging schedules and thermostat habits are all more useful data than a city average. NOAA's 1991-2020 normals show the climate condition, not the individual bill.

There are two paperwork tracks, and neither is instant.

At City Hall, residential PV uses Modesto's expedited solar path when it fits the checklist. The route covers roof-mounted, utility-interactive systems on one- or two-family dwellings at 10 kW AC CEC rating or less, without battery storage, subject to roof, loading, connection and inverter limits. A project outside those constraints falls out of the expedited lane. The City's submittal requirements are technical because the screen is technical.

Solar is not one of the self-issued online permits listed by the City. Applicants provide three plan copies at the counter or email electronic files under 10 MB to permits@modestogov.com. When a panel change or service upgrade is involved, electrical load calculations are required. The City's current published residential electrical photovoltaic permit fee is $333, effective July 1, 2025 through June 30, 2026. The City had not published a 2026-27 Building Safety fee sheet when the research was completed. Published City fee schedule.

MID is a separate clock. The interconnection fee is $900 for a system below 100 kW AC CSI rating per meter. The application package must be mailed or dropped at MID's downtown office. Electronic submissions are not accepted. The handbook describes one to three weeks for initial paperwork review, then one to three weeks for engineering review. The word “expedited” on the City side does not erase this utility process.

After the City or County inspection passes, the result needs to be less than six months old for MID. MID normally performs its interconnection inspection within 12 working days, then installs the generation meter. A failed MID inspection creates a $250 reinspection fee. The system must interconnect within a year of MID's acknowledgment, subject to a possible six-month extension. The May 2026 MID Solar Interconnection Handbook is worth reading before a contract turns these dates into your problem.

This is not a reason to avoid solar. It is a reason to sequence it correctly. Ask who prepares the physical package, who delivers it, when the $900 is due, who tracks the six-month inspection expiration and whether the price includes a failed-inspection return visit. A contractor who has done MID jobs should answer each one without pausing.

No MID rebate exists. Do not let a proposal imply one.

MID states directly that it does not offer solar rebates. Its residential solar offering is Net Metering 2.0; a separate feed-in tariff applies to systems from 30 kW to 3 MW. The City pages and published fee schedule show the standard permit charge, not a waiver. There is also no community choice aggregator here to add a battery rebate or export bonus. MID solar program is concise on the absence of a rebate.

SGIP is also not an MID option. The CPUC program is administered through the investor-owned utility territories, including PG&E territory, while Modesto is served by a publicly owned utility. There is no point putting a large battery incentive in a Modesto proposal unless the source is something other than SGIP and the installer can name it. The CPUC SGIP participation page explains its utility structure.

Federal incentives do not fill that hole for a homeowner buying in 2026. The residential 25D credit ended December 31, 2025. A lease or PPA provider may claim 48E, which is the provider's tax treatment, not a credit passed automatically to the customer. CRS IN12611 is the short primary-policy reference. In Modesto, the investment case needs to stand up before federal magic is added.

Use this calculator for scale, not for an MID true-up

This tool intentionally starts from MID's first-tier summer energy charge and local production. It still values generated energy like a retail offset, which makes it optimistic for production that is exported. That limitation is prominent because hiding it would be dishonest in Modesto. Use the system-size output as a question for bidders, then ask them to prove the self-consumption percentage.

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Modesto source notebook

These are the documents behind the local rules discussed above, reviewed on August 22, 2026.

• City of Modesto Building Permits, expedited PV requirements, and Building Safety fee schedule
• MID Schedule D residential tariff, MID Net Metering 2.0, and MID solar FAQs
• MID Solar Interconnection Handbook, MID solar program, and MID Who We Are
• CPUC SGIP participation information
• California Department of Finance E-5 housing table, NOAA Modesto normals, and PVGIS
• Congressional Research Service IN12611