Sunrun stock is trading around US$9.47 after a very steep 82.3% decline over the past 5 years, and the valuation checks send a mixed message about whether that reset has gone far enough.

• Over 5 years, Sunrun shareholders have seen the share price fall 82.3%. This puts the current valuation in the context of a long and painful reset rather than a short term swing.
• Future demand for residential solar and Sunrun's ability to turn that demand into steady cash flows can support the current price. At the same time, ongoing capital needs and execution risk on long dated customer contracts may weigh on what investors are willing to pay.
• On Simply Wall St's broader checks Sunrun screens as undervalued on some measures but not others. This results in a mixed valuation score of 3 out of 6 that stops short of a clear bargain or clear overvaluation.

For investors, the debate is whether Sunrun's sharp multi year share price decline already reflects the key risks, or if the current level still leaves limited margin of safety.

Is Sunrun a Bargain on Earnings?

The P/E ratio is a useful cross check for Sunrun because it anchors the current share price to the earnings the business is already reporting. On this measure, Sunrun trades on a P/E of about 4.0x, compared with an Electrical industry average of roughly 35.0x and a broader peer group around 42.6x.

Simply Wall St's fair P/E ratio for Sunrun is 16.7x, which reflects what investors might typically pay given its sector, size and risk profile. The gap between this fair multiple and the current 4.0x suggests the stock trades at a sizable discount to where this framework would usually place it, even after accounting for the risks that drive that fair ratio.

On the P/E multiple alone, Sunrun stock screens as undervalued compared with both its tailored fair ratio and the wider industry group.

The Sunrun Narrative: What Would Justify Today's Price?

Simply Wall St Narratives pick up where Sunrun's valuation puzzle leaves off by spelling out which combinations of future growth, margins and earnings would need to play out for the stock to be worth materially more or less than today. Each scenario links its number to a clear view of how Sunrun's growth, profitability and risks might evolve, which you can then revisit on the Community page as fresh information comes through.

One of the top community narratives on Sunrun: 50% undervalued

"Sunrun embodies the tension at the heart of the energy transition, massive long-term demand constrained by short-term financial realities..."

Do you think there's more to the story for Sunrun? Head over to our Community to see what others are saying!

The Bottom Line

Sunrun looks undervalued on the P/E multiple, although the broader checks are only mixed rather than strongly supportive. That leaves the current discount as a question rather than an answer. The key issue is whether Sunrun can translate demand for residential solar into reliable earnings and cash flows without eroding that margin of safety through funding needs or contract execution problems. The crux for investors is whether the market is being too harsh on those risks or is correctly pricing a potential value trap.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.