Best Solar Companies in Colorado: How to Choose the Right Installer

Choosing the right solar installer is one of the most important decisions you will make in your solar journey. The equipment matters, but even the best panels and inverters underperform when poorly designed or installed. A quality installer ensures your system is optimally designed for your roof, properly installed to code, correctly connected to the grid, and supported for decades to come.

Colorado has dozens of solar installation companies ranging from national chains to local specialists. This guide helps you evaluate and compare them so you can make a confident choice.

What Makes a Good Solar Installer

NABCEP Certification

The North American Board of Certified Energy Practitioners (NABCEP) is the gold standard certification for solar professionals. A NABCEP-certified installer has passed rigorous exams covering system design, installation, electrical codes, and safety. They must also complete continuing education to maintain their certification.

Not every installer at a company needs to be NABCEP-certified, but the company should have at least one certified designer and one certified installer on staff. Ask specifically about NABCEP credentials during your consultations.

Years in Business

The solar industry has seen many companies come and go. A company that has been operating in Colorado for five or more years has demonstrated financial stability, customer satisfaction, and the ability to weather market fluctuations.

This matters for warranty support. If your installer goes out of business five years after installation, their workmanship warranty is worthless. Equipment manufacturer warranties survive (they are from the manufacturer, not the installer), but having a local company available for troubleshooting, maintenance, and warranty coordination is invaluable.

Local vs. National Companies

Both local and national companies can do excellent work, but there are important differences:

Local companies tend to offer:

• Direct access to the owner and management
• Faster response times for service and maintenance
• Deep knowledge of local codes, utilities, and conditions
• More flexible scheduling and customization
• Accountability to the local community

National companies tend to offer:

• Larger marketing budgets (which means more name recognition, not necessarily better work)
• Sometimes lower prices through volume purchasing
• Standardized processes and training
• Less flexibility in equipment choices and system design

Many homeowners find that local Colorado companies provide a better overall experience. The relationship does not end at installation — it continues for 25+ years of system operation.

In-House vs. Subcontracted Installation

Ask whether the company uses its own employees for installation or subcontracts the work. In-house installation crews provide:

• Consistent quality control
• Direct accountability
• Better communication between designers and installers
• Lower risk of scheduling delays

Companies that subcontract may have less control over installation quality and timelines. This is not a deal-breaker — some subcontractors do excellent work — but it is worth knowing.

Manufacturer Certifications

Leading equipment manufacturers certify installers who meet their training and quality standards:

• Enphase Platinum/Gold Installer: Demonstrates high-volume Enphase installation experience and training
• Tesla Certified Installer: Trained and authorized to install Tesla solar and Powerwall products
• SolarEdge Certified Installer: Trained on SolarEdge inverter and optimizer systems
• LG Pro Dealer / QCell Certified: Panel manufacturer training and preferred pricing

These certifications indicate that the installer has invested in training and maintains a relationship with the equipment manufacturers. This can matter for warranty support and access to the latest products.

Red Flags to Watch For

High-Pressure Sales Tactics

A quality solar company does not pressure you to sign today. Be wary of:

• "This price is only good today" — Legitimate pricing does not expire overnight
• Door-to-door salespeople insisting on an immediate decision
• Claims that incentives are "about to expire" (the federal tax credit is available through 2032)
• Refusal to provide a written proposal for your review

Solar is a major investment. Any reputable company will give you time to review proposals, compare quotes, and make an informed decision.

Unrealistic Savings Claims

If a company promises your electric bill will be zero, that your system will pay for itself in three years, or that you will make money selling electricity back to the grid, be skeptical. While solar provides excellent savings, honest projections show:

• Electric bills reduced by 70 to 90 percent for most systems (not always 100 percent)
• Payback periods of 7 to 10 years in Colorado (not 3 to 4)
• Net metering credits that offset consumption but rarely generate income

For realistic savings analysis, see our article Is Solar Worth It? and use our solar calculator for personalized estimates.

No Workmanship Warranty

Equipment manufacturers warranty their products (panels for 25 years, inverters for 12 to 25 years). But who warranties the installation work — the roof penetrations, the wiring, the racking attachment? That is the installer's workmanship warranty.

A reputable installer offers a workmanship warranty of at least 10 years, and the best companies offer 25 years. This covers issues caused by installation quality rather than equipment defects — roof leaks from poorly sealed mounts, wiring problems, racking failures, and similar issues.

No Physical Office

A company operating out of a PO Box or with no local presence is a risk. Verify that your installer has a physical office location in Colorado that you could visit if needed.

Extremely Low Prices

While competitive pricing is great, be cautious of quotes significantly below the market range. Extremely low prices often indicate:

• Cheaper, lower-quality equipment
• Inadequate engineering and design work
• Cut corners on installation (fewer attachment points, cheaper wiring, etc.)
• Underpaid or inexperienced crews
• A company that may not survive long-term

The current market rate for quality residential solar in Colorado is $2.50 to $3.25 per watt. Quotes significantly below $2.50/W deserve scrutiny about what is being compromised.

Evaluating Proposals

When you have proposals from two or three installers, compare them on these key factors:

Equipment Quality

Not all panels and inverters are equal. Compare:

• Panel brand and model: Premium brands like REC, QCell, and Panasonic offer better performance and warranties than budget brands. See our QCell vs. REC comparison and best solar panels guide.
• Inverter type: Microinverters vs. string inverters — different approaches with different trade-offs
• Battery storage: If included, compare brands and specifications. See our home battery storage guide.

System Design

A well-designed system maximizes production on your specific roof. Look for:

• Production estimate methodology: Does the proposal include a shade analysis? Is the production estimate based on satellite imagery of your actual roof?
• Panel placement: Are panels placed optimally, avoiding vents, chimneys, and shaded areas?
• System size justification: Is the system sized to match your electricity consumption, or is the company trying to sell the largest possible system?

For help understanding proposals, see our guide on how to read a solar proposal.

Warranty Coverage

Compare warranty terms:

Warranty Type	Good	Better	Best
Panel product	12 years	25 years	25-30 years
Panel performance	80% at 25 yr	86% at 25 yr	92% at 25 yr
Inverter	12 years	15 years	25 years
Workmanship	10 years	15 years	25 years

Financing Terms

If you are financing, compare:

• Interest rate: Currently 4-8% for solar loans
• Loan term: 10 to 25 years
• Dealer fees: Some "low rate" loans include dealer fees that inflate the system cost by 15 to 30 percent
• Prepayment penalties: Ensure you can pay off the loan early without penalty

See our solar financing guide for complete details.

Price (After Adjusting for Differences)

Compare total cost for equivalent systems. A lower price on a proposal using budget panels and a basic string inverter is not a fair comparison to a proposal using premium panels and microinverters. Adjust for equipment differences before comparing prices.

The federal tax credit applies equally to all installers, so compare pre-credit prices.

Questions to Ask Every Installer

Before signing with any company, ask these questions:

1. How long have you been installing solar in Colorado?
2. Do you have NABCEP-certified designers and installers on staff?
3. Do you use your own employees or subcontractors for installation?
4. What is your workmanship warranty, and what does it cover?
5. Can you provide references from customers with systems at least two years old?
6. How do you handle warranty claims — do you work directly with manufacturers?
7. What monitoring system is included, and how do I track my system's performance?
8. What happens if your company goes out of business? (Not a rude question — it is practical)
9. Do you handle permitting, utility interconnection, and HOA approval?
10. What is your projected timeline from contract signing to system activation?

How to Get and Compare Quotes

Get Multiple Quotes

We strongly recommend getting at least three quotes from different installers. This gives you a baseline for pricing, helps you evaluate different equipment options, and lets you compare the quality of each company's consultation process.

Use the Consultation Process

The sales consultation itself is a good indicator of the company's quality. A good consultant will:

• Ask about your energy goals, not just try to sell the biggest system
• Review your electricity bills and usage patterns
• Explain their equipment choices and why they recommend them
• Provide a detailed, written proposal (not just a verbal estimate)
• Answer your questions patiently and without pressure
• Be transparent about costs, timeline, and realistic savings

Check Reviews and References

• Google Reviews: Look for 4.5+ stars with a significant number of reviews
• BBB Rating: Check the Better Business Bureau for complaints and resolution
• EnergySage Reviews: EnergySage is a major solar marketplace with verified reviews
• SolarReviews: Another review platform specific to solar companies
• Ask for references: Contact two or three past customers directly

ProGreen Solar's Approach

At ProGreen Solar, we believe in transparency, quality, and long-term relationships. Here is what differentiates us:

• Locally owned and operated in Colorado — we live in the communities we serve
• NABCEP-certified design and installation teams
• In-house installation crews — no subcontractors
• Enphase Platinum Installer and Tesla Certified Installer
• 25-year workmanship warranty — one of the strongest in Colorado
• Transparent pricing — no hidden dealer fees, no inflated costs, no pressure
• Free, no-obligation consultations — we provide detailed proposals and give you time to decide
• Equipment choices from Enphase, Tesla, REC, QCell, and other premium brands

We install both microinverter and string inverter systems and recommend the best solution for each customer's specific situation — not the product with the highest margin.

Take the Next Step

Choosing the right solar installer is worth the effort. A quality installation from a reputable company will produce clean energy for your home for decades with minimal issues. A poor installation from a fly-by-night company can cause roof damage, underperformance, and years of frustration.

Use our solar calculator to start exploring your solar options, and call (303) 484-1410 to schedule a free consultation with ProGreen Solar. We will give you an honest assessment of your solar potential and a detailed proposal you can compare with confidence.