Solar Panel Manufacturing Plant Costs: 6 Crucial Insights

Planning to start a solar panel manufacturing factory and need a detailed cost breakdown? This article outlines the key expenses involved:

• Machinery and equipment (investment)
• Building and construction (investment)
• Infrastructure (investment)
• Materials in stock (working capital)
• Production cost per watt (material + operating costs)

Working capital is essential for solar panel production, as it covers the cost of materials purchased before you can manufacture and sell the panels. The figures here are rough estimates for material working capital, representing cash flow requirements rather than final production costs.

Different Sizes for PV Production Plants

Solar (PV) production machinery comes in a wide range of sizes, so you can start with a very small line (e.g., 25 MW) using refurbished equipment or opt for brand new machines.

Brand new machines range from 50 MW (the smallest size) to fully automated lines with a capacity of 1 GW or more.

While a smaller 25 MW plant requires less initial investment, a capacity of 100 MW or more is a good starting point for new equipment.

This analysis covers three common scenarios:

• A 25 MW line with refurbished equipment
• A 100 MW line with new machines
• A new, fully automated 600-800 MW line

We offer customized solar module production lines to fit all sizes and demands. For a personalized quote, please send a request through our contact form >>

Machinery Investment for a Solar Module Production Line

The investment required depends on three main factors:

• Whether you choose refurbished machines (cheaper) or new equipment (more options)
• The size of the solar module manufacturing line
• The level of automation in the production process

Refurbished Machines 

Opting for refurbished machines can significantly lower your initial investment. For example, a 25 MW line might require only €250,000.00 (two hundred fifty thousand euros) for the equipment. The trade-off, however, is a limitation on the panel types you can produce and an inability to use the latest technology.

On the other hand, this is a good opportunity to start production, test the market, and begin sales without taking on the significant risk of a large investment.

We recommend refurbished equipment for those looking to enter the market and learn the process while minimizing financial risk. This approach can be an excellent starting point, especially in areas with lower labor costs or in markets where demand is for smaller-sized panels.

New Machines for Solar Module Production

To start with the latest technology and a high degree of automation, you should opt for new solar production machines. This equipment is capable of manufacturing panels with the latest features, such as:

• 650+ watt panel designs (210 mm wafer)
• 550+ watt panel designs (182 mm wafer)
• Half-cut designs
• Third-cut designs
• All technologies like PERC, PERCT, TopCon, and HJT
• Multi-busbar technology

Automation will be significantly higher with new equipment compared to refurbished units, but the cost will also be substantially greater.

You can start with a new line from about 50 MW, but 100 MW is often more effective.

For example, a medium-automated 100 MW line costs approximately €1.5–2 million, with prices varying based on the level of automation and specific technology. If you are interested in a quote for a new line, please send us a request with your desired size, and we will provide a personalized offer: Contact >>

Building Investment for a Solar Panel Factory

In addition to machinery, you’ll also need to invest in a building to house the following:

• The production area for your machinery
• Storage for incoming materials
• Storage for outgoing materials (finished panels)
• Infrastructure (air conditioning, compressed air, electrical power supply)

Below are some examples for three typical solar module production line sizes:

20-25 MW Refurbished Equipment Solar Factory

For a small, refurbished production line, we believe it doesn’t make financial sense to construct a new building for two main reasons:

1. Only a small space is needed, typically around 500-800 sqm.
2. You will likely expand your factory in the future, at which point the building may be too small for a new line.

Therefore, assuming you rent a building, you would only need to invest in infrastructure, which would cost approximately €100,000 (one hundred thousand euros).

100 MW New Solar Factory

Finding an existing building suitable for a 100 MW line can be challenging. While renting is an option, our experience shows that most investors prefer to construct a new facility for a 100 MW solar production line.

A 100 MW line, including storage and office space, requires a building of about 1,000 sqm. While prices vary by country, a reasonable cost estimate is approximately €1.5 million.

600-800 MW New Solar Factory

A factory with a capacity of up to 800 MW requires a building of about 5,500 sqm, which could cost around €6 million. As with smaller facilities, this price will vary depending on the country of construction.

Working Capital and Initial Costs

Like any manufacturing business, you will need sufficient initial capital to cover:

• Working capital (materials for solar module production)
• Initial salaries (e.g., during the construction phase)
• Initial losses (as you ramp up the factory)

The estimates below correspond to the three factory sizes discussed throughout this article.

20-25 MW

For a small production line, our rough estimate for working capital is €100,000 (one hundred thousand euros).

100 MW Line

For a 100 MW line, we recommend holding more stock to mitigate the risk of production stoppages. You should therefore budget approximately €800,000 (eight hundred thousand euros) for working capital.

800 MW Production Line

To ensure you have enough stock to avoid halting production due to material shortages, you should budget approximately €6.5 million for working capital and materials.

Manufacturing Cost: Materials

Material Costs vs. Total Production Costs

The bill of materials for solar panels makes up over 95% of total production costs, making it the single most dominant factor in solar module manufacturing.

Manufacturing costs of solar module production

Materials for Solar Panel Manufacturing

The following materials are needed for a solar module production factory:

• Front glass
• Encapsulant foil (layer 1)
• Solar cells
• Ribbons (cell connectors)
• Interconnection ribbons (busbars to connect cell strings)
• Encapsulant foil (layer 2)
• Backsheet (or backside glass for glass-glass panels)
• Junction box, diodes, and connectors
• Aluminum frame set

The primary material costs are driven by solar cells (over 40%), front glass (around 20%), and the aluminum frame (14%). The chart below illustrates the cost percentage for each key component.

Solar panel manufacturing plant cost breakdown of the total material costs

Manufacturing Cost: Overheads

Overhead Cost Definition

Overhead costs are the ongoing operating expenses of a factory, which consist mainly of:

• Human resources
• Depreciation of CAPEX (machinery, building, other investments)
• Factory running costs (maintenance, energy, financing, etc.)

While material costs are dominant, overheads still represent 3% to 12% of total manufacturing costs, depending on the factory’s scale of production.

Overhead Costs by Factory Size

Below are rough estimates for overhead costs in U.S. dollar cents per watt for different factory sizes:

• 25 MW factory: 1–2 dollar cents per watt
• 100 MW factory: ~1 dollar cent per watt
• 400 MW factory: 0.5–0.9 dollar cents per watt
• 800+ MW factory: ~0.5 dollar cents per watt or lower

Please note: The quality of the equipment you purchase accounts for only a small portion of the total production costs. When calculated per watt, the difference between a high-quality 500+ MW production line from Germany and a cheaper, lower-quality alternative is almost negligible for the finished solar panels.

Get all 6 crucial insights on solar panel manufacturing costs in one handy PDF.