Solar — Sep 21 – Sep 25, 2026 (Wk 39): Solar Stocks Decline Amid High Borrowing Costs; Swelect Energy Invests in Captive Projects

September 25, 2026 · · 6 min read
Weekly theme roundup · Sep 21 – Sep 25, 2026
Covering the 14 Solar stocks in our database — browse every Solar name →

TL;DR — Solar stocks generally saw declines this week, with high borrowing costs identified as a factor impacting project financing. Despite this, some companies like Swelect Energy Systems announced new investments in solar projects, indicating continued development within the sector.

Median price / model value
1.70×
the typical stock trades above our model value · 14 stocks
Insider tape (CMP-filtered)
0 buys
open-market, routine & 10b5-1 stripped

What moved

  • First Solar's stock experienced a significant decline, reaching a 52-week low and falling by 8%, with other solar companies like Enphase Energy and SolarEdge also seeing drops of 4% and 5% respectively. This movement was attributed to high borrowing costs, which can increase the expense of financing new solar projects, and a shift in a patent case for First Solar. [The Globe and Mail] [24/7 Wall St.] [Quiver Quantitative] [Investing.com]
  • Canadian Solar stock was noted as not being a strong consideration by one source, suggesting a lack of positive sentiment or compelling factors for this specific company during the week. [Seeking Alpha]
  • Swelect Energy Systems approved investments totaling approximately ₹20.87 Crore (or ₹20.77 Crore in another report) for 37.6 MWp captive solar projects and a subsidiary acquisition. This indicates continued investment and expansion within the solar energy sector, particularly for self-consumption projects. [Trade Brains] [scanx.trade]
  • Some solar stocks are facing tariff risks, which could impact their profitability by increasing the cost of imported components or reducing the competitiveness of their products in certain markets. [simplywall.st]
  • Lake Energy launched a solar project investment model for individual investors in the U.S., potentially broadening access to solar project financing and investment opportunities beyond institutional players. [markets.businessinsider.com]
  • Norway's Fund increased its support for Northern Solar's renewable energy growth, which can provide capital for expansion and development of solar projects in that region. [SolarQuarter]

The why behind the week

  • High borrowing costs, reflected in the macro backdrop's 10-yr Treasury yield of 5.11% and high-yield credit spread of 2.8%, directly impact the financing of large-scale solar projects. Higher interest rates make it more expensive for developers to secure loans, which can reduce project viability and slow down development, thereby affecting the revenue and growth prospects of solar companies. [24/7 Wall St.] [macro data]
  • The approval of significant investments by Swelect Energy Systems for captive solar projects highlights a continued demand for solar energy, particularly for businesses seeking to generate their own power. This type of investment can provide a stable revenue stream for solar developers and equipment providers, even amidst broader market pressures. [Trade Brains] [scanx.trade]
  • Tariff risks are a significant concern for solar stocks because tariffs can increase the cost of solar components or finished products, potentially reducing profit margins for manufacturers and installers, or making solar energy less competitive compared to other energy sources. [simplywall.st]

The macro backdrop

10-yr Treasury 5.11%Expected inflation 2.3%VIX 15.1High-yield spread 2.80%Yield curve (10y–2y) 0.31%
How to read it
  • Credit Spread: tight — credit markets are relaxed, no stress being priced
  • Yield Curve: flat — the recession-warning zone; a rapid steepening from here has often preceded the actual downturn
  • Vix: calm — the market is complacent, which cuts both ways (little cushion if news turns)

Every theme swims in this tide — judge the week’s moves against it.

📅 On the calendar — and why it matters here

  • Fri Sep 25 — FOMC (Fed rate decision / minutes). the single biggest scheduled market mover — a rate surprise in either direction repriced everything, hardest on rate-sensitive names (growth, REITs, utilities, homebuilders). Watch for a surprise vs expectations — that gap, not the number itself, is what moves markets.
  • Tue Sep 29 — JOLTS (job openings). labor-market tightness — a cooling read eases wage-inflation fears. Watch for a surprise vs expectations — that gap, not the number itself, is what moves markets.
  • Wed Sep 30 — GDP. the broadest growth read — confirms or breaks the soft-landing thesis. Watch for a surprise vs expectations — that gap, not the number itself, is what moves markets.
  • Wed Sep 30 — PCE inflation (the Fed's gauge). a hot print pushes rate-cut odds out (pressuring long-duration assets); a soft print does the reverse — one of the highest-impact releases. Watch for a surprise vs expectations — that gap, not the number itself, is what moves markets.
  • Fri Oct 2 — Jobs report (payrolls + unemployment). sets the growth-vs-recession narrative — a weak number lifts recession odds (hits cyclicals, consumer, financials); a strong one can paradoxically pressure rates. Watch for a surprise vs expectations — that gap, not the number itself, is what moves markets.

What to watch next

  • The 10-year Treasury yield, currently at 5.11%, is a key indicator to watch. A sustained increase could further raise borrowing costs for solar project financing, potentially dampening investment and development in the sector. Conversely, a decrease could ease financial burdens and stimulate growth. [macro data]
  • The high-yield credit spread of 2.8% is relevant as it reflects the cost of borrowing for companies with lower credit ratings, which can include some solar developers. A widening spread would indicate increased risk perception and higher financing costs, while a narrowing spread would suggest the opposite. [macro data]
  • The overall market risk, as indicated by the VIX at 15.05, suggests a relatively calm market. However, any significant increase in volatility could lead to broader market downturns that might affect solar stocks, even if their fundamentals remain strong. [macro data]
  • The median price-to-model-value across 14 stocks at 1.7x provides a valuation context for the sector. Changes in this metric could indicate shifts in how the market values solar companies relative to their intrinsic models, which can be influenced by factors like interest rates and policy changes. [SAVNG data]

This week’s headlines (sources)

Every claim above cites its source — headlines link to the original outlet; [SAVNG data] marks our own EDGAR-computed figures. Where our sources don’t explain a move, we say so rather than guess. All weekly roundups →

All Solar roundups: 2026-W41 · 2026-W40 · 2026-W38 · 2026-W37 · 2026-W36 · every scope →

SAVNG is an educational research publication, not a Registered Investment Adviser. Everything here is general-circulation information produced by an automated pipeline — the same for every reader — and is not personalized investment advice, an offer, or a recommendation to buy or sell any security. Any performance figure is hypothetical; past performance does not predict future results. Details.

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