Business solar: costs, incentives, and ROI in 2026

Italian companies not yet generating their own solar energy are losing a competitive edge. With energy costs still high, the active 220% super-depreciation, and payback periods under 3 years for well-planned projects, 2026 is the right year to invest in corporate photovoltaics.

In this guide, we analyze costs, incentives, ROI, and an alternative that doesn't even require a construction site. Whether you have a warehouse or a rented office, there's a solution for your business.

Why corporate photovoltaics are more advantageous than ever in 2026

Three factors align in 2026 to make corporate photovoltaics particularly cost-effective:

• Electricity costs still high for businesses (0.25-0.35 euro/kWh for medium-to-high consumption profiles)
• 220% Super-Depreciation (Transition 5.0) which halves payback periods
• Stabilized module prices at historical lows (0.11-0.13 euro/Wp)

The result: an average business system pays for itself in 3-5 years, compared to 5-7 years for the residential sector. The main reason is self-consumption: businesses consume during the day, when the system produces. Typical business self-consumption is 70-90%, compared to 30-40% for residential.

Costs of a corporate photovoltaic system

Costs vary based on system size and installation type. Here are the price ranges for the most common sizes in 2026:

• 20 kW (small businesses, medium warehouse): 35,000-50,000 euros
• 50 kW (medium businesses): 80,000-120,000 euros
• 100 kW (large enterprises): 140,000-200,000 euros
• 200 kW+ (industry): 250,000+ euros (decreasing price per kW)

The cost per installed kW decreases with size: a 200 kW system can cost 1,000-1,200 euros/kW, while a 20 kW system can reach 1,800-2,500 euros/kW. This makes corporate solar particularly attractive for medium and large enterprises, where economies of scale are significant.

Hyper-depreciation 2026: the tax benefit

Hyper-depreciation 2026 allows businesses to deduct up to 220% of the system cost. With a corporate tax rate (IRES) of 24%, the net tax benefit can cover over 50% of the investment cost. For the complete guide, read our article onHyper-depreciation 2026.

Key requirements

• Photovoltaic modules produced in the EU or with top-tier efficiency certification
• Energy monitoring system (Industry 4.0)
• Technical appraisal for investments above 300,000 euros
• Reservation: pay at least 20% by December 31, 2026, installation by June 30, 2027

Hyper-depreciation can be combined with other incentives, but not with the feed-in tariff scheme. It is important to check compatibility with any other regional incentives before proceeding.

ROI: how much you really save

Here is a practical example for a company with an annual consumption of 80,000 kWh that installs a 50 kW system:

• System: 50 kW, cost 100,000 euros
• Estimated production: 65,000 kWh/year
• Self-consumption: 85% (55,250 kWh directly consumed)
• Electricity bill savings: €16,500/year (at €0.30/kWh)
• Hyper-depreciation benefit: €52,800 (220% x 100,000 x 24% corporate tax)
• Net payback: 2.8 years
• Total savings over 25 years: €412,500 + residual value of the system

The calculation is conservative: it does not account for any potential increases in energy prices, which would accelerate the payback. Also consider that storage can increase self-consumption up to 95%, but it comes with an additional cost that needs to be evaluated on a case-by-case basis.

The construction-free alternative: B2B shared solar farms

Not all companies have a suitable roof, an owned warehouse, or the desire to undertake a construction project. For these businesses, an alternative exists: investing in shares of shared solar farms without installing anything on their own properties.

How it works for businesses

1. You purchase shares of an operational or under-construction solar farm
2. You receive revenue from the sale of the energy produced
3. 30% IRES tax credit as an innovative startup (GridShare is a registered innovative startup)
4. No structural constraints, no construction, no maintenance

Advantages over owning your own system

• Zero installation costs and maintenance
• Systems located where solar yield is highest (Sicily, Southern Italy)
• Immediate tax benefit (30% IRES as an innovative startup)
• Scalable investment: start small and scale up over time
• No technical risk or permitting risk: everything is managed by GridShare

For companies that want to start small and validate the model before investing in their own system, the shared park is the ideal solution.

Business solar vs. shared park: when to choose which

The choice depends on the company's situation. Here's a practical summary:

• Available roof/warehouse and high daytime consumption: own system + accelerated depreciation
• No roof or rented space: shared solar park (GridShare)
• Limited budget but wants to start: shared park (starting from 500 euros)
• ESG and sustainability reporting: both, but the shared park is faster to implement

In many cases, the best solution is a mixed approach: a proprietary system on the main warehouse + shares in shared parks to cover the consumption of secondary sites or rented offices.

Do you want to reduce your company's energy costs?

GridShare helps Italian businesses invest in solar, with or without a rooftop. Use our simulator to calculate ROI, or contact us for personalized advice on GridShare.it.