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Power Solutions International vs Capstone Energy Plus: PSIX and CEPL compared
Power Solutions International is the larger company: $202M of revenue in its latest quarter (Q3 2026) against $24.9M for Capstone Energy Plus (Q1 FY27). Power Solutions International is growing faster (-0.9% against -11% a year earlier). Power Solutions International is more profitable, with an operating margin of 20.2% against 3.9%.
Where the money goes: PSIX and CEPL
Power Solutions International (PSIX) · Q3 2026
Power Solutions International, Q3 2026: revenue $202M (-0.9% year over year), operating margin 20.2%, net earnings $29.9M, operating cash flow $40.9M. The chart follows the revenue to costs, profit and cash.
Capstone Energy Plus (CEPL) · Q1 FY27
Capstone Energy Plus, Q1 FY27: revenue $24.9M (-11% year over year), operating margin 3.9%, net earnings $37K, operating cash flow $5.4M. The chart follows the revenue to costs, profit and cash.
| Power Solutions International (PSIX) | Capstone Energy Plus (CEPL) | |
|---|---|---|
| Latest quarter | Q3 2026 | Q1 FY27 |
| Revenue | $202M | $24.9M |
| Revenue growth, Y/Y | -0.9% | -11% |
| Gross margin | 29.7% | 35.1% |
| Operating margin | 20.2% | 3.9% |
| Net earnings | $29.9M | $37K |
| Net margin | 14.8% | 0.1% |
| Operating cash flow | $40.9M | $5.4M |
| Free cash flow | $38.3M | $4.5M |
Where the revenue comes from
Power Solutions International
- Power Systems: $163M (81%)
- Industrial: $33.7M (17%)
- Transportation: $5.3M (3%)
Capstone Energy Plus
- Product and Accessories: $13.0M (52%)
- Parts and Services: $9.7M (39%)
- Rentals: $2.2M (9%)
Questions
Which is bigger, Power Solutions International or Capstone Energy Plus?
Power Solutions International is the larger company: $202M of revenue in its latest quarter (Q3 2026) against $24.9M for Capstone Energy Plus (Q1 FY27).
Is Power Solutions International or Capstone Energy Plus growing faster?
Power Solutions International is growing faster (-0.9% against -11% a year earlier).
Which is more profitable, Power Solutions International or Capstone Energy Plus?
Power Solutions International is more profitable, with an operating margin of 20.2% against 3.9%.
More: Power Solutions International earnings · how Power Solutions International makes money · Capstone Energy Plus earnings · how Capstone Energy Plus makes money
From the companies' latest 10-Q, 10-K or earnings release (10-Q filed Nov 5, 2026; 10-Q filed Aug 12, 2026). Fiscal quarters can end on different dates. Not investment advice.