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Who They're For and What They Solve
Solar system design is the engineering phase that happens before installation. It maps your roof or ground space, measures sun exposure hour by hour, analyzes your actual electricity consumption, and produces a specification: how many panels, what wattage, which inverter, what mounting, and exactly where every component sits.
Anyone considering solar needs this done properly. That includes homeowners replacing a roof, business owners watching demand charges climb, property investors adding value, and people holding three installer quotes that disagree wildly. It also includes owners whose existing array underproduces and nobody can explain why.
Good design solves the gap between promised production and delivered production. Skip it and you get systems sized on guesswork, shading nobody modeled, inverters that clip output, and permit rejections that stall projects for weeks. A bad design underperforms for twenty-five years, and no installation quality fixes it.
Is It Time?
Most people arrive here after something specific happened.
Our Services
Our solar system design work spans four engineering disciplines, and every project receives all four.
We map obstructions, measure azimuth and tilt, and model irradiance across the full solar year. Trees, chimneys, and neighboring structures all get quantified. You receive hour-by-hour shading data showing exactly which roof planes earn their panels.
We pull twelve months of consumption data rather than estimating from one bill. Seasonal swings, EV charging, and planned additions all factor in. The result is a system sized to your real usage and your chosen offset target, not a sales template.
Single-line diagrams, conductor and overcurrent sizing to NEC Article 690, rapid shutdown compliance, and rafter load calculations. Every plan set arrives permit-ready for submission, which is why 98% of ours clear on first review.
String inverters, microinverters, or hybrid systems each suit different roofs and goals. We specify the architecture, size storage against your critical loads, and diagram which circuits stay live during an outage.
Not sure which approach your situation needs? We assess first and recommend only what’s necessary, no upsells.
Why Homeowners Choose Mr. Local Services
Our designers hold NABCEP PV Design Specialist certification and we are a licensed electrical contractor. Engineering stays in house, so nobody outsources your plan set to a template mill.
Our modeled production estimate lands within 5% of actual first-year output or we redesign at no charge. Very few will put that in writing.
Complete diagrams, load calculations, and equipment cut sheets formatted for submission. A 98% first-submission approval rate keeps projects from stalling in review queues.
No brand quotas and no distributor pressure. Equipment gets specified because it fits your roof and your budget, not because a rep needed the volume.
How It Works
Call 951-458-6466 and we gather your utility history, roof details, and energy goals. Typically 30 minutes.
A designer measures the site, documents obstructions, and verifies structural condition. Usually completed within one week of your call.
We build the layout, run production modeling, size the electrical, and produce the plan set. Five to ten business days.
We walk you through the design line by line, revise as needed, and deliver documents you own outright.
Pricing
I will give you real numbers instead of a form. Residential solar system design typically runs $500 to $1,500 depending on roof complexity, and commercial projects range from $2,000 to $8,000 based on square footage and electrical scope.
Four factors move the price: number of roof planes or array sections, whether structural engineering stamps are required, battery and backup circuit inclusion, and utility interconnection complexity.
Every design fee is quoted flat before work starts, and it is credited in full toward installation if you proceed with us. Nothing gets added mid-project.
Shade analysis, load profiling, system sizing, single-line electrical diagrams, structural calculations, equipment specifications, and a permit-ready plan set you own.
Most residential designs finish in five to ten business days after the site assessment. Commercial projects typically take two to three weeks.
Yes. You own the documents outright. Many clients use our plan set to competitively bid the installation.
No. Call 951-458-6466 and we discuss your goals, roof, and usage at no cost before any fee is quoted.
Twelve months of actual consumption data, your target offset percentage, and modeled production per panel given your specific shading and orientation.
No, design is a separate engineering deliverable. When you are ready to build, our solar panel installation team executes the plan set exactly as engineered, which is why the two services work best together.
Yes. Licensed electrical contractor, NABCEP PV Design Specialist certified, carrying $2M general liability and workers' compensation.
A design done right pays back for twenty-five years. Book your consultation and get numbers you can actually verify.
