TECOGEN INC.

In addition to the risks described below, you should carefully consider the factors discussed under "Item1A - Risk Factors” in our Annual Report on Form 10-K for our fiscal year ended December 31, 2024 ("2024 Form 10-K") The risks discussed in our 2024 Form 10-K could materially affect our business, financial condition and future results. The risks described in our 2024 Form 10-K and below are not the only risks we face. Additional risks and uncertainties not currently known to us or that we currently deem to be immaterial also may materially and adversely affect our business, financial condition or operating results.

We incurred a loss from operations of $594,244 during the three months ended March 31, 2025, compared to a loss from operations of $1,049,885 in the same period in 2024. We have a history of incurring losses from our operations and there can be no assurance we will be able to increase our revenues, manage our expenses and cash flows, and become profitable in the future.

We incurred a loss from operations of $594,244 during the three months ended March 31, 2025, compared to a loss from operations of $1,049,885 in the three months ended March 31, 2024. Historically, we have incurred losses from operations, including a loss of $4,760,238 in the year ended December 31, 2024, and, as of March 31, 2025, we had an accumulated deficit of $48,299,816. Our business is capital intensive and, because our products are built to order with customized configurations, the lead time to build and deliver a unit can be significant. We may be required to purchase key components long before we can deliver a unit and receive payment. Changes in customer orders or lack of demand may also impact our profitability. There can be no assurance we will be able to increase our sales and achieve and sustain profitability in the future. Our cash flows from operations are insufficient to fund our business and, currently, we are reliant upon financing provided by related parties to help fund our operations.