Renewable energy stocks are up sharply Thursday as investors speculate that interest rate increases will at least pause for a while after yesterday's Federal Reserve meeting. Short-term rates were kept flat for a second straight meeting at 5.25% to 5.5%. There's speculation that December's meeting will keep rates the same as well as the economy absorbs higher rates.

The big reaction for renewable energy companies comes because many have dropped dramatically as rates have risen. The most notable moves today were Sunnova Energy (NOVA -5.60%) jumping as much as 14.1%, Maxeon Solar (MAXN 11.98%) popping 12.3%, ChargePoint (CHPT 3.33%) gaining 14.3%, FuelCell Energy (FCEL 1.40%) gaining 11.5%, and Plug Power (PLUG 6.63%) up 9.9% at its peak.

Wind and solar in front of a mountain.

Image source: Getty Images.

Why interest rates impact renewable energy stocks

Higher rates have hit renewable energy stocks especially hard because most projects are financed with debt over 10-20 years. Higher rates make the long-term cash flows less valuable and therefore the initial project less valuable, the same way bonds have fallen in value over the past year.

For installation companies like Sunnova, higher rates have directly increased financing costs and therefore they need to either reduce installation costs or raise prices to make money. This impacts suppliers like Maxeon, ChargePoint, FuelCell Energy, and Plug Power who are trying to sell their products to asset owners.

The entire industry is tied together and higher rates have made business more difficult.

What's going on with rates?

Today, the market is speculating that a pause in rate increases will at least make business easier and rate cuts may even be on the horizon. We see that in U.S. government 10-year bonds, which now yield 4.67%, a 6 basis point reduction from yesterday.

But look at the chart below and you can see that rates have been rising for two years and have started to flatten out in 2023. So, the long-term picture is still that rates are up and likely to stay higher for longer than a lot of investors expected a year or two ago.

10 Year Treasury Rate Chart

10 Year Treasury Rate data by YCharts.

I think the pressures that we've seen on the renewable energy industry are going to remain as higher labor costs and interest rates combine to hurt demand. Rates would have to not only stop climbing but actually drop for this to be a bullish trend for renewable energy projects.

The one positive is that electricity prices are expected to rise broadly as utilities face the same challenges I described above. They'll have to increase rates to make money and that will make renewable energy projects more competitive.

I think the long-term picture is positive for renewable energy, but investors will want to focus on companies that can generate positive cash flow when the market recovers. Plug Power, FuelCell Energy, and ChargePoint weren't profitable even when rates were lower, so I see no upside for them today.

PLUG Net Income (TTM) Chart

PLUG Net Income (TTM) data by YCharts

Sunnova and Maxeon have a brighter future, but it may take a year or two for the industry to really adjust to higher rates.