Power Plant Valuation and LCOE Analysis

One of the most common mistakes energy CEOs make is conflating "cost to build" with "value created." A solar farm that costs $30M to build might generate $40M of value if financed correctly. Or it might generate $20M of value if the off-taker credit is weak or the debt is expensive. The cost is the same. The value is wildly different.

Understanding how to value a power generation asset - and more specifically, understanding the difference between what something costs to build and what it's worth once built - is the foundation of capital allocation discipline.

LCOE is a Starting Point, Not an Answer

Levelized Cost of Energy (LCOE) is an industry standard metric: the all-in cost to generate one MWh of electricity. You take total capex plus total operating costs over the life of the plant, discount them back to present value, and divide by total MWh generated. Out comes a cost per MWh - say, $35/MWh for a solar project or $45/MWh for an onshore wind farm.

LCOE is useful for comparing technology costs across projects. A 2024 solar project with $1.2M/MW capex and $15/kW/year operating costs has a different LCOE than a 2020 solar project with $1.5M/MW capex and $12/kW/year operating costs. The trend in LCOE tells you about technology learning curves and cost inflation.

But LCOE is not the value of the project. LCOE is not the price you'd pay to buy an existing plant. LCOE is certainly not the return you'll earn as an equity investor. It's a single input to valuation - useful, but incomplete.

From Cost to Value: Three Valuation Perspectives

1. The Buyer's Perspective (What Would You Pay?)

Imagine you're considering buying an existing 100 MW solar plant. The seller is asking $65M. How do you decide if that's a good price?

You look at the cash flows. The plant generates 200,000 MWh annually at $50/MWh under contract = $10M annual gross revenue. Operating costs are $2M annually. That leaves $8M for capex reserve, debt service, and equity return. If debt is $40M at 4%, that's $1.6M annually. After debt service, you have $6.4M for capex reserve (assume $0.5M) and equity ($5.9M). That's a 9% equity IRR on your $65M investment.

Is 9% good? That depends on your cost of capital and the risk profile. If you can borrow at 4% and equity investors demand 10%, then 9% is cheap - the plant is overpriced. If equity investors are willing to accept 8% for low-risk contracted assets, then 9% is attractive. The LCOE of that plant tells you something about whether it's cost-competitive (is $50/MWh competitive with new builds at $35-40/MWh LCOE?). But the valuation tells you whether it's a good investment for you specifically.

2. The Developer's Perspective (What Should I Build?)

Now flip the lens. You're a developer deciding whether to build a 100 MW solar plant. Your capex cost is $100M. Operating costs are $1.5M/year. You can secure a 25-year PPA at $50/MWh.

What's the value of that plant to you? You model it with $60M of debt at 4% and $40M of equity. Annual revenue is $10M, operating costs are $1.5M, debt service is $2.4M, reserve is $0.5M. Equity gets $5.6M annually, which on a $40M investment is a 14% IRR.

But wait - that's before-tax and before-tax-equity. Add in the 30% ITC, and suddenly you're capturing $30M of tax credits. If you structure tax equity optimally, you might reduce your net cash equity investment to $25M. Now the 14% IRR becomes 22%+.

Is that a good deal? Depends on your hurdle rate. If you're comparing to other projects with similar risk, yes. If you're a large utility with a 8-10% cost of capital, maybe not. But the point is: the value to you depends on your capital structure, your cost of capital, your ability to monetize tax credits, and your debt cost. The LCOE tells you something about technology cost. Valuation tells you whether you should build it.

3. The Refinancer's Perspective (What Cash Flows Matter in Year 15?)

Now imagine you developed that solar plant 15 years ago. The PPA has 10 years remaining at $50/MWh. After that, the plant goes merchant. The original debt has been paid down, but you need to refinance some of the remaining balance. A new lender is looking at the project.

The lender cares about cash flows for the next 10 years (the remaining PPA term). In the 10 years after that (years 25-35), the cash flows are uncertain - the project is merchant. The lender might apply a much lower value to those years or ignore them entirely.

That changes valuation. Even though the project's full 35-year LCOE might be $40/MWh, the refinancing valuation depends heavily on PPA certainty. The value in years 1-10 might be worth 80% of a comparable new PPA project. The value in years 11-35 might be worth 20-30% of the same project with a new PPA.

The LCOE-to-Valuation Bridge

Here's how to think about it:

LCOE tells you: Is this technology cost-competitive? A solar farm with LCOE of $35/MWh is more efficient than one with $50/MWh.

Valuation tells you: Can I make an acceptable return on capital if I build/buy this project? Even if solar LCOE is $50/MWh and wind LCOE is $40/MWh, a solar project might be more attractive to you if it can be financed at better rates or if you have existing solar operational expertise.

The bridge is your capital structure and the specific offtake terms:

LCOE ($35/MWh) + Financing advantage (low-cost debt from a utility) + Contract certainty (25-year utility PPA) + Tax arbitrage (tax equity at favorable terms) = Valuation ($50/MWh offtake price generates 12% equity IRR).

What This Means for Your Capital Allocation

Calculate LCOE for your projects, but don't stop there. LCOE is a useful technology benchmark. But it's not the decision variable for whether to build or buy.

Always model valuation from three perspectives: What is this project worth to a buyer today (corporate valuation)? What will it be worth to me as a developer (equity IRR under my capital structure)? What will it be worth to a refinancer in 10 years (based on remaining contract certainty)?

Separate physical engineering from financial engineering. The LCOE depends on panel efficiency, equipment cost, installation labor, and O&M hours. The valuation depends on financing costs, tax structure, and offtake contract quality. Both matter. They're different. Confusing them leaves money on the table.

Track both metrics as your company grows. Your LCOE relative to competitors tells you about operational excellence. Your valuation spread (the premium you can generate over blended cost of capital) tells you about financial leadership. You need both.