The Generac 7109 Two Wire Start Kit is an essential accessory designed to enable remote start functionality for compatible home standby generators. This kit allows your Generac generator to be started and stopped automatically by external control devices such as solar inverters (e.g., Enphase, Sol-Ark), battery storage systems, or third-party transfer switches, eliminating the need for a dedicated Generac automatic transfer switch .
Key Specifications:
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Part Number: 7109 (also referenced as G0071091 and 71090)
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Product Type: Remote Start / Two-Wire Start Accessory Kit
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Compatibility: Air-cooled home standby generators with Evolution or Sync 2.0 controllers (LCD screen equipped)
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Not Compatible With: Nexus controllers or liquid-cooled generators (liquid-cooled units have factory-installed 2-wire start capabilities)
Core Features:
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Remote Activation: Enables external devices to command the generator to start and stop using a simple dry contact closure. When the two wires from this kit are connected (closed), the generator starts and runs; when disconnected (opened), the generator stops after the programmed cooldown cycle .
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Cost-Effective Solution: Allows you to use an existing transfer switch or integrate with third-party equipment (solar inverters, battery systems) rather than purchasing a new Generac-branded transfer switch, potentially saving significant installation costs .
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Broad Compatibility: Works with all air-cooled Generac units and other brands (such as Honeywell) equipped with Evolution or Sync 2.0 controllers. Compatible with PowerPact units as well .
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Complete Installation Kit: Includes the necessary wire harness with pre-terminated Molex pins for direct connection to the generator's Evolution controller board.
How It Works:
The two-wire start system operates on a simple "closed = run, open = stop" principle:
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When an external controller (inverter, battery system, etc.) closes a dry contact relay, the two wires are connected, signaling the generator to start
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The generator will run as long as the connection remains closed
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When the external controller opens the relay, the generator enters its cooldown cycle and then shuts down
Compatible Generac Models:
This kit works on air-cooled home standby generators equipped with:
