EP1676023-A2  See references of WO 2005036721A2;  See also references of WO 2005036721A2US7969030-B2  PCT/US04/032857, Mar. 28, 2006, ISR.;  PCT/US04/032857, Mar. 28, 2006, Written Opinion.;  PCT/US04/032857, Apr. 24, 2006, IPRP.US8492913-B2  PCT/US04/032857_PCT, Mar. 28, 2006, ISR, Written Opinion, IPRP.;  Gastechnology: The Source for Energy Solutions, "Inverter-Based System: Opening New Doors for Cogeneration" vol. 22 Issue 2, Summer 2009,;  Gertsman, Eric: Tecogen Natural Gas Engine-Driven Products, "Tecogen Launches First CHP Product to Run Seamlessly on and off the Utility Grid, Using an Advances Control System" Press Release Mar. 28, 2007.;  Martini et al.: Tecogen "In-Verde" Model INV-100 Product Overview. "CHP Basics: The Next Generation Chip Technology.";  Panora et al.:Tecogen, Inc. "Design and Testing of an Inverter-Based Combined Heat and Power Module for Special Application in a Microgrid" pp. 1-8.;  Panora, Robert A.: Tecogen Natural Gas Engine-Driven Products, "Tecogen in Verde (TM) 100kW Inverter-Based Combined Heat and Power Module has Obtained UL1741 Certification" Press Release Apr. 13, 2009.;  Panora, Robert A.: Tecogen Natural Gas Engine-Driven Products, "Tecogen Receives Mutliple Unit Order from Sacramento Utility for Groundbreaking Microgrid Demonstration Project" Press Release Sep. 21, 2010.;  Tecogen "In Verde 100" Features & Benefits, "Proven Low-Emission Natural Gas V-8 Engine, 454 cid, 1000-3000 rpm".;  Tecogen Natural Gas Engine-Driven Products, "Tecogen Introduces Inverter-Based CHP Module to Europe" Press Release Sep. 4, 2008.US8829698-B2  Gastechnology: The Source for Energy Solutions, "Inverter-Based System: Opening New Doors for Cogeneration" vol. 22 Issue 2, Summer 2009.;  Gertsman, Eric: Tecogen Natural Gas Engine-Driven Products, "Tecogen Launches First CHP Product to Run Seamlessly On and Off the Utility Grid, Using an Advances Control System" Press Release Mar. 28, 2007.;  Panora, Robert A.: Tecogen Natural Gas Engine-Driven Procuts, "Tecogen In Verde (TM) 100kW Inverter-Based Combined Heat and Power Module has Obtained UL1741 Certification" Press Release Apr. 13, 2009.;  Panora, Robert A.: Tecogen Natural Gas Engine-Driven Products, "Tecogen Receives Mutliple Unit Order from Sacramento Utility for Groundbreaking Microgrid Demonstration Project" Press Release Sep. 21, 2010.;  Tecogen Natural Gas Engine-Driven Products, "Tecogen Introduces Inverter-Based CHP Module to Europe" Press Release Sep. 4, 2008.;  Martini et al.: Tecogen "In-Verde" Model INV-100 Product Overview. "CHP Basics: The Next Generation Chip Technology", (2012).;  Panora et al.:Tecogen,Inc. "Design and Testing of an Inverter-Based Combined Heat and Power, Module for Special Application in a Microgrid", (2012), pp. 1-8.;  Tecogen "In Verde 100" Features & Benefits, "Proven Low-Emission Natural Gas V-8 Engine, 454 cid, 1000-3000 rpm", (2012).US9502943-B2  WO PCT/US04/032857&#x2014;IPRP, Apr. 24, 2006, Woods, Edward.;  WO PCT/US04/032857&#x2014;Written Opin, Apr. 24, 2006, Woods, Edward.;  WO PCT/US04/032857&#x2014;Search Rpt, Apr. 24, 2006, Woods, Edward.;  Gastechnology: The Source for Energy Solutions, &#x201c;Inverter-Based System: Opening New Doors for Cogeneration&#x201d; vol. 22 Issue 2, Summer 2009.;  Gertsman, Eric: Tecogen Natural Gas Engine-Driven Products, &#x201c;Tecogen Launches First CHP Product to Run Seamlessly On and Off the Utility Grid, Using an Advances Control System&#x201d; Press Release Mar. 28, 2007.;  Martini et al.: Tecogen &#x201c;In-Verde&#x201d; Model INV-100 Product Overview. &#x201c;CHP Basics: The Next Generation Chip Technology&#x201d;, (2012).;  Panora et al.:Tecogen, Inc. &#x201c;Design and Testing of an Inverter-Based Combined Heat and Power Module for Special Application in a Microgrid&#x201d; pp. 1-8.;  Panora, Robert A.: Tecogen Natural Gas Engine-Driven Products, &#x201c;Tecogen In Verde (TM) 100kW Inverter-Based Combined Heat and Power Module has Obtained UL1741 Certification&#x201d; Press Release Apr. 13, 2009.;  Panora, Robert A.: Tecogen Natural Gas Engine-Driven Products, &#x201c;Tecogen Receives Mutliple Unit Order from Sacramento Utility for Groundbreaking Microgrid Demonstration Project&#x201d; Press Release Sep. 21, 2010.;  Tecogen &#x201c;In Verde 100&#x201d; Features &#x26; Benefits, &#x201c;Proven Low-Emission Natural Gas V-8 Engine, 454 cid, 1000-3000 rpm&#x201d;.;  Tecogen Natural Gas Engine-Driven Products, &#x201c;Tecogen Introduces Inverter-Based CHP Module to Europe&#x201d; Press Release Sep. 4, 2008.