[RE-wrenches] Sol-Ark 12k w/ Generac Transfer Switch

[Luke Christy]

Rick, 
On most of their home standby models, Generac defeats the two wire start capability in programming and ships them set up to auto-start on a loss of utility power only. On most of these models with the Evolution or Nexus controller there is a way to re-program them for two-wire start capability. This involves entering a password on the generator controller and selecting the two-wire start option. One also has to install the start trigger wires into the controller plug, so Generac sells a kit with the wires and programming instructions for two-wire start. It’s hard to find but out there. 
Note that Generac standby generators are set up so that the generator controller senses the utility loss and a trigger signal is then sent to the transfer switch, whereas most other brands have the controls and utility loss sensing hardware in the transfer switch and the generator is triggered by a simple two-wire start signal from the transfer switch board. 

Luke Christy

Renewable energy consultant.

NABCEP Certified PV Installation Professional™: 

Solar Gain Services, LLC
PO Box 531
Monte Vista, CO. 81144
SGSRenewables at Gmail.com <mailto:SGSRenewables at gmail.com>
719.588.3044


> On Jun 17, 2021, at 7:41 AM, rick at solshineenergy.com wrote:
> 
> Wrenches,
> 
> I’m looking to tie in a Generac Powerpact 7.5kW generator with transfer switch to a Sol-Ark 12kW. The Sol-Ark has a two wire start (NO or NC) capability, however, the Generac transfer switch operates on loss of 240V. Is my only option to use a relay driven by the two wire start to drop 240V to the transfer switch? 
> 
> Thank you,
>  
> rick brown
> SolShine Energy Alternatives, LLC
> Electrical & Solar Contracting Services
> www.SolShineEnergy.com <http://www.solshineenergy.com/>
> Check, Virginia 24072
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> 
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