How NAZ Solar Electric Supports a Commercial Project
Engineers specify the system, not a catalog. Our solar application engineers do commercial system design as their day job. They'll work from your loads, your service voltage, and your site rather than from a template.
Components confirmed to work together. Equipment that works individually doesn't always communicate correctly in combination. Inverter and battery pairings, comms protocols, and rapid shutdown compatibility get checked before you order, not after something arrives and won't talk to the rest of the system.
Component pricing and a project you can phase. An installed package prices as one number. Buying the equipment separately lets you see what each part costs, keep your own contractor, and split a build across budget years.
Distributing solar equipment since 1979. We've been shipping equipment and answering technical questions since before most of the industry existed, and support doesn't stop when the freight leaves.
Which C&I Category Do You Need?
Category is determined by your service type and what the system has to do. Start here, then filter within a category by manufacturer, output voltage, or budget.
| C&I Grid-Tie Inverters (3 Phase) |
For commercial buildings on three-phase service where the goal is offsetting consumption. Covers 208V, 240V, 277V, and 480V output. A standard grid-tie system shuts down during a utility outage unless backup equipment is added. |
| C&I Battery Solutions (ESS) |
Commercial battery storage for outage backup, critical-load support, and shifting consumption out of high-cost periods. Rackmount and cabinet lithium iron phosphate (LFP) systems that scale by adding modules. |
| C&I Multi-Mode Inverters |
Grid-interactive and off-grid capable inverters for facilities that need to keep operating when the utility drops, or that have no utility connection at all. |
| C&I Grid-Interactive & Off-Grid Kits |
Pre-configured commercial systems where the inverter, storage, and balance of system have already been matched. A starting point rather than a fixed package. |
| C&I Accessories |
Energy meters, rapid shutdown transmitters, three-phase breaker kits, enclosure covers, and the connectors and adapters a commercial install needs. |
Commercial Solar System Design
Most people arriving here have a building and a rough idea of what they want, not a component list. Commercial solar system design is the work of turning the first into the second, and it's what our engineers do before any equipment gets quoted.
Commercial PV system design usually covers:
- Load analysis. What the building actually consumes across a year, what its peak demand is, and which loads have to keep running if the utility doesn't.
- Service and voltage review. Single or three phase, service voltage, main panel capacity, and whether there's room for what you're adding.
- Array layout. Rooftop or ground, orientation, string sizing against the inverter's MPPT range, and shading.
- Component compatibility. Confirming the inverter, storage, monitoring, and rapid shutdown equipment work as a system.
- A specification you can use. An equipment list and technical requirements you can hand to a contractor or put out to competitive bid, so the proposals you get back are comparable.
Design assistance is provided for systems purchased from NAZ Solar Electric. To be clear about scope: we do not install, and we do not analyze utility tariffs or billing data. We supply the equipment, the engineering behind it, and support for the installing contractor through commissioning.
Start With the Building's Load
The most expensive mistake in a commercial project is sizing the array before anyone has measured what the building uses. Peak demand, duty cycles on refrigeration and pumps, and motor starting current all change the answer, and none of them appear on a square-footage estimate. Starting current in particular drives inverter selection more than total kilowatt-hours do.
Twelve months of utility bills is the single most useful thing you can send us. Our load calculator works through the appliance-by-appliance math if you don't have bills to hand, and the Learning Center covers the reasoning behind it.
Solar by Application
If you'd rather start from what the building does than from a product category, these pages cover the applications we see most often.
- Agriculture — irrigation, livestock water, and remote farm and ranch equipment.
- Cold Storage — keeping walk-in coolers and freezers running through an outage.
- Small Business — stores, stations, hotels, and independent storefronts.
- Schools, Co-ops & Community Solar — districts, congregations, and nonprofits.
- Portable & Temporary — gates, job sites, and remote equipment.
Commercial & Industrial Solar Questions
What makes commercial solar equipment different from residential?
Mostly service type and scale. Commercial buildings are frequently on three-phase power at 208V, 277V, or 480V, where homes are single or split phase at 120/240V. That changes the inverter entirely. Commercial equipment also tends to be built for higher continuous output, larger string counts, and monitoring that reports to a facilities team rather than a phone app.
Do you carry three-phase solar inverters?
Yes. Our three-phase grid-tie inverter category covers 208V, 240V, 277V, and 480V output from manufacturers including Fronius, Solis, GoodWe, SMA, and Hoymiles. Tell us your service voltage and array size and we can narrow it down.
Can you design a commercial solar system for my building?
Yes. Our solar application engineers handle load analysis, service and voltage review, array layout, string sizing, and component compatibility, and produce an equipment list and technical specification. Design assistance is provided for systems purchased from NAZ Solar Electric. Send twelve months of utility bills, your service voltage and phase, and photos of the main panel to get started.
Do you install commercial solar systems?
No. NAZ Solar Electric is a solar equipment distributor and system design resource. We supply the equipment and the engineering behind it and support the installing contractor through commissioning. If you don't have one lined up, let us know where you are. We may have installers who work in your area.
Can you provide a specification for a competitive bid?
Yes, and public agencies and districts that have to bid competitively often find this the most useful thing we do. A bid needs a specification before it goes out, and we can help build the equipment list and technical requirements so the proposals you receive back are comparable rather than five different systems.
Will a commercial grid-tie system run my building during an outage?
Not on its own. Grid-tie inverters are required to shut down when the utility goes down so they can't backfeed a line crews may be working on. Keeping a building running takes battery storage, a grid-interactive or multi-mode inverter, and a critical-load panel carrying only the circuits that have to stay on.
Can a commercial system be expanded later?
Often, and it's far easier when it's planned up front, because inverter capacity and battery architecture set the ceiling. If you expect to add capacity or loads, say so during sizing so the initial configuration leaves you room.
Talk to an Application Engineer
Tell us what the facility does, what it runs, and what your service looks like. We'll work through the loads and put together an equipment list you can take to a contractor or out to bid.
Commercial & Industrial Sales
Request a Quote
Or call 800-383-0195
Twelve months of utility bills and your service voltage gets us furthest fastest.
