How Much Do First Solar Solar Panels Cost in 2026?

Last updated: February 1, 2026

Complete First Solar solar panel pricing guide for 2026. Compare costs per watt, installation prices, and value across all First Solar models.

You've narrowed your solar panel search to First Solar — great choice. But before you sign an installer contract, you need to understand what you'll actually pay. Panel prices are just 25-35% of total system cost; installation, inverters, permitting, and overhead make up the rest. Let's break down the real numbers so you can negotiate with confidence.

First Solar offers 2 solar panel models ranging from 465W to 545W, with efficiencies between 19.2% and 19.8%. Pricing varies by distributor and installer, but First Solar panels are generally considered competitively priced based on their specification tier. The total installed cost of a solar system using First Solar panels depends on system size, inverter choice, installation complexity, and your region.

Key Takeaways

• First Solar sells 2 panel models from 465W to 545W
• Panel pricing varies by model and installer — get 3+ quotes
• Efficiency range: 19.2%–19.8% (industry average ~21%)
• An 8 kW system with First Solar panels needs ~15 panels
• The 30% federal solar tax credit applies to all First Solar panel installations
• Total installed system cost typically runs $2.50–$3.50 per watt including labor

Quick Solar Calculator

Use this reference table to estimate your solar needs based on common home sizes:

Home Size	Est. Usage	System Size	Panels Needed	Est. Cost	After 30% ITC
1,000-1,500 sq ft	7,500 kWh/yr	5 kW	~12	$15,000	$10,500
1,500-2,000 sq ft	10,000 kWh/yr	7 kW	~16	$21,000	$14,700
2,000-2,500 sq ft	12,000 kWh/yr	8 kW	~19	$24,000	$16,800
2,500-3,500 sq ft	15,000 kWh/yr	10 kW	~23	$30,000	$21,000
3,500+ sq ft	20,000 kWh/yr	13 kW	~30	$39,000	$27,300

Formula: Panels needed = Annual kWh ÷ (Panel watts × Sun hours × 365 ÷ 1000). Using 440W avg panel, 4.5 peak sun hours. Costs at $3.00/watt national average. Full sizing guide →

First Solar Solar Panel Models

Model	Power	Efficiency	Cell Type	Warranty	Degradation
Series 7 545W	545W	19.8%	CdTe (Cadmium Telluride)	10/30 yr	0.5%/yr
Series 6 Plus 465W	465W	19.2%	CdTe (Cadmium Telluride)	10/30 yr	0.5%/yr

Sorted by efficiency. Click any model for full specifications.

Estimated System Costs with First Solar Panels

System Size	Panels Needed	Est. Cost (before ITC)	After 30% ITC
5 kW	~10 panels	$12,500–$17,500	$8,750–$12,250
8 kW	~15 panels	$20,000–$28,000	$14,000–$19,600
10 kW	~19 panels	$25,000–$35,000	$17,500–$24,500
12 kW	~23 panels	$30,000–$42,000	$21,000–$29,400

Estimates based on national average installed costs of $2.50–$3.50/watt. Actual prices vary by location, installer, and system configuration. Using Series 7 545W (545W) for panel count estimates.

Frequently Asked Questions

How much does a full First Solar solar system cost?

A complete solar system using First Solar panels typically costs $2.50–$3.50 per watt installed, depending on system size and location. For an 8 kW system (~15 First Solar panels), expect $20,000–$28,000 before the 30% federal tax credit brings the net cost to $14,000–$19,600. This includes panels, inverter, mounting hardware, permitting, and labor.

Are First Solar solar panels worth the price?

First Solar panels offer 19.8% peak efficiency with 10-year product warranties. They deliver solid performance at a competitive price point, making them a reasonable value for most residential installations. The key is comparing the total installed cost per watt — not just the panel price — across multiple installer quotes.

What is the cheapest First Solar solar panel?

The most affordable First Solar panel is typically the lowest-wattage model in their lineup (465W at 19.2% efficiency). However, the cost per watt often decreases with higher-wattage models, so the best value may be a mid-range or higher-wattage option. Always compare the cost per watt rather than the per-panel price.

Does First Solar offer financing or leasing?

First Solar is a panel manufacturer, not an installer, so they don't directly offer financing. However, most solar installers offer multiple financing options including solar loans (typically 4–7% APR for 10–25 years), leases, and power purchase agreements (PPAs). Cash purchases give you the best long-term ROI. The 30% federal tax credit is only available with purchases or loans, not leases.

How do First Solar panels compare on price vs competitors?

First Solar panels compete in the value tier alongside Trina, JA Solar, and similar high-volume manufacturers. Price differences between brands are typically $0.05–$0.20 per watt for panels alone, but this is a small fraction of total system cost. Focus on the installed cost per watt from your specific installer quotes.