How Much Should a 15kW Solar System Cost?

The cost of a 15kW solar system will vary on numerous factors, including your location, equipment quality, installation complexity, and available incentives. However, here is a rough price guide:

Average Price Range (Before Incentives)

$2.00 – $3.00 per watt installed is typical in the U.S.

For a 15kW system:
15,000W × $2.50 = $37,500

Thus, expect to pay around $30,000 to $45,000 for a full 15kW solar installation.

Federal and Local Incentives

You can claim the U.S. federal solar Investment Tax Credit (ITC), which qualifies you for 30% discount on your cost from taxation:

30% of $37,500 = saving of $11,250

Net cost with ITC: around $26,250

There are also rebates and performance-based incentives provided by states and utilities which can lower your overall cost even further.

What's Included in the Price?

A turnkey 15kW solar installation typically includes:

• High-efficiency solar panels (about 38–50 units)
• Inverter(s) – string or microinverters
• Mounting hardware & wiring
• Installation labor
• Permits & inspection fees
• Monitoring system
• Warranty coverage (typically 25 years on panels)

Off-Grid vs. Grid-Tied

If you're designing off-grid, expect an additional cost for:

• Battery storage
• Charge controllers
• Backup generators (optional)

This may add the total cost by $10,000–$20,000 depending on your energy storage needs.

A well-designed 15kW solar array is an investment—but one that can pay substantial long-term savings on electricity, especially with incentives factored in.

Click here to access the latest wholesale prices for LZY solar products!