For a company with hundreds or thousands of locations, one of the biggest challenges with solar isn’t deciding whether to invest in it. It’s deciding where to start.

Two seemingly identical restaurants, retail stores, warehouses, or commercial buildings can produce dramatically different financial results from solar. A system that generates an attractive return at one location might make little economic sense at another—even when the buildings have similar energy consumption.

Electricity rates, solar productivity, available space, utility rules, incentives, construction costs, and local requirements can all affect project economics.

That’s why multi-site companies shouldn’t evaluate solar one property at a time. The better approach is to screen the entire portfolio, identify the locations with the strongest potential, and prioritize investment accordingly.

Here are the most important factors to consider when determining which locations in your portfolio are the best candidates for solar.

1. Electricity Costs

One of the strongest predictors of solar economics is the price you’re currently paying for electricity.

Every kilowatt-hour produced by a solar system can potentially replace a kilowatt-hour that would otherwise have been purchased from the utility. As a result, locations with higher electricity rates generally have greater opportunities for savings.

But simply comparing average electricity prices isn’t enough.

Commercial utility tariffs can include:

• Energy charges based on kilowatt-hour consumption
• Demand charges based on peak electrical demand
• Time-of-use rates
• Seasonal rates
• Fixed charges
• Non-bypassable charges
• Other utility-specific fees

Solar may reduce some of these charges significantly while having little or no effect on others.

A sophisticated portfolio analysis should therefore identify the utility and applicable tariff at every location and estimate how solar production will interact with that specific rate structure.

For a company with 500 locations, this can immediately reveal that certain utility territories deserve much greater attention than others.

2. Annual Electricity Consumption

The next question is straightforward: How much electricity does the location actually use?

Commercial buildings with higher electricity consumption generally have more opportunity to consume solar energy on-site.

For multi-site businesses such as restaurants, grocery stores, convenience stores, and retailers, this can be particularly attractive because their electricity consumption often occurs during daylight hours when solar systems are producing power.

Ideally, companies should collect at least 12 months of electricity consumption for each location. Interval data—showing energy usage in 15-minute or hourly increments—is even more valuable because it allows solar production to be compared directly against the building’s load profile.

The goal isn’t necessarily to produce 100% of the building’s annual electricity consumption.

Instead, the system should typically be designed around the combination of available space, utility economics, load profile, export compensation, project cost, and investment objectives that creates the strongest financial result.

3. Solar Productivity

The same solar system will not produce the same amount of electricity everywhere.

A 100 kW solar system in Southern California, for example, will generally produce more electricity than the same system in a less sunny part of the country.

Solar productivity is commonly expressed as annual kilowatt-hours of electricity generated per kilowatt of installed solar capacity:

kWh/kW/year

If one location can generate 1,600 kWh per installed kW while another generates 1,200 kWh, the first location could generate roughly 33% more electricity from an identically sized system.

Factors affecting production include:

• Solar irradiance
• Latitude
• Weather
• System orientation
• Tilt
• Shading
• Equipment efficiency
• Temperature
• System design

When screening a large portfolio, sophisticated solar-production models can estimate expected productivity using the latitude and longitude of each property.

This makes solar productivity another useful data point that can be calculated across hundreds or thousands of locations before detailed engineering begins.

4. Available Space

A location can have high electricity rates and excellent sunlight but still be a poor solar candidate if there isn’t enough suitable space for the system.

For commercial properties, solar can generally be installed in two primary locations: on the building’s roof or over the parking lot using solar canopies.

Rooftop systems may offer lower construction costs, but roof condition, mechanical equipment, shading, structural limitations, landlord restrictions, and future roof replacement plans can limit their feasibility.

Solar canopies can provide significantly more usable area for properties with large parking lots while also creating shaded parking and providing infrastructure that can potentially support EV charging.

Restaurants and retail properties are particularly interesting candidates for solar canopies because they frequently have relatively small buildings but substantial electricity consumption and large parking areas.

For portfolio screening, satellite imagery and building data can increasingly be used to estimate potential solar area before conducting a physical site visit.

5. Utility Territory and Interconnection Rules

The utility serving a location affects much more than its electricity rate.

Utilities can have dramatically different rules governing:

• System interconnection
• Export compensation
• Maximum system size
• Application requirements
• Engineering studies
• Fees
• Approval timelines

This means that two locations with otherwise similar economics could have very different development timelines and financial outcomes simply because they’re located in different utility territories.

Identifying the electric utility serving every property should therefore be one of the first steps in portfolio analysis.

Once utility territories are mapped across the portfolio, companies can identify where favorable rates and interconnection policies overlap with strong solar resources.

6. Federal, State, Utility, and Local Incentives

Incentives can dramatically change the economics of commercial solar.

Depending on the location and project, incentives may include federal tax credits, bonus credit opportunities, accelerated depreciation benefits, state programs, utility rebates, renewable-energy credits, and other local incentives.

The important point for a multi-site company is that incentive eligibility can vary by address.

Two stores located 20 miles apart could potentially have different incentive opportunities.

This makes incentive mapping an important component of portfolio optimization.

Instead of evaluating incentives after deciding where to install solar, companies should incorporate incentive eligibility into the initial site-ranking process.

Doing so can uncover locations that might otherwise have been overlooked.

7. Local Solar Requirements

Sometimes the best location for solar isn’t simply the property with the highest financial return. It’s a property where solar will need to be installed anyway.

California provides an important example.

The state’s building energy standards can require solar photovoltaic systems—and, under certain circumstances, battery storage—on certain newly constructed commercial buildings.

For companies developing restaurants, retail stores, and other commercial properties in California, solar therefore needs to be considered during the building-development process rather than after construction is complete.

Other state and local requirements may also influence whether solar should be incorporated into a project.

For companies operating nationally, tracking these requirements across multiple jurisdictions can become increasingly difficult.

A portfolio strategy should therefore distinguish between discretionary solar opportunities and compliance-driven projects.

8. Building Ownership and Lease Structure

Property ownership can significantly affect project feasibility.

A company that owns its buildings generally has more control over solar installation decisions. For leased properties, the company may need landlord approval before installing equipment on the roof, parking lot, or electrical infrastructure.

Lease duration also matters.

If a company has only a few years remaining on a lease, investing in an asset expected to operate for decades may require additional contractual protections or a different financial structure.

For leased locations, portfolio screening should identify:

• Property owner
• Remaining lease term
• Renewal options
• Roof and parking rights
• Responsibility for electricity costs
• Landlord approval requirements

Resolving these questions early prevents development teams from spending significant resources evaluating projects that ultimately can’t move forward.

9. Construction and Development Costs

Solar isn’t priced identically everywhere.

Labor costs, permitting requirements, engineering standards, equipment needs, structural conditions, prevailing-wage requirements, and site-specific construction complexity can all affect project costs.

Multi-site companies have an important advantage, however: standardization.

When similar systems are deployed across dozens of locations, companies can potentially standardize equipment, engineering, procurement, construction processes, and documentation.

This can reduce costs while also making projects easier to manage.

Portfolio analysis should therefore consider not only the economics of individual projects but also opportunities to group similar projects into regional or programmatic deployments.

10. Put Everything Together Into a Portfolio Score

No single factor determines whether a commercial property is a good solar candidate.

The most effective approach is to combine these variables into a standardized scoring methodology.

For example, a multi-site company could evaluate every property based on:

Factor	Portfolio Data
Electricity Economics	Utility, tariff, annual spend, $/kWh
Energy Consumption	Annual kWh and load profile
Solar Resource	Estimated kWh/kW/year
Physical Feasibility	Roof and parking availability
Incentives	Federal, state, utility and local
Requirements	Solar or battery mandates
Property Control	Owned vs. leased
Development Complexity	Permitting and interconnection
Project Economics	Savings, payback, NPV and IRR

Instead of starting with 500 site visits and 500 individual feasibility studies, a company can first perform a desktop analysis across all 500 properties.

The portfolio might then be divided into tiers.

The highest-ranked locations move immediately into detailed feasibility and development. A second group remains in the future pipeline. Locations with poor economics or significant development constraints can be deprioritized.

The result is a much more efficient allocation of capital and internal resources.

This is why Integrate Solar developed the Solar Profitability Estimator, a tool designed specifically to help multi-site businesses prioritize their locations based on solar profitability. All you have to do is click on this link and paste your California locations into the tool. In seconds, you’ll get a ranked list of your locations and an estimate of how quickly the system will pay for itself.

From Individual Solar Projects to Portfolio Strategy

The traditional commercial solar model evaluates buildings individually.

That approach doesn’t scale particularly well for a company operating hundreds or thousands of locations.

Multi-site companies have something much more valuable: a portfolio of potential energy assets.

The opportunity is to analyze those assets simultaneously and determine where capital will create the greatest return.

At Integrate Solar, we’re building our approach around this portfolio-level challenge—bringing together location data, electricity consumption, utility information, solar productivity, incentives, regulatory requirements, project development, installation, and ongoing system performance.

The objective isn’t simply to answer:

“Can we install solar here?”

It’s to answer a much more valuable question:

“Of all the locations where we could install solar, where should we invest first?”

For companies managing hundreds or thousands of commercial properties, answering that question can be the difference between completing a handful of disconnected solar projects and building a scalable distributed-energy strategy.