[RE-wrenches] EG4 GridBOSS Generator Exercise

[Chris Sparadeo]

Jason,

I think the DTS-1 controller might be what you are after. You could power
it off the generator’s 12Vdc battery and DIN mount in the enclosure.

https://cdn.shopify.com/s/files/1/1204/1734/files/DTS-1-Spec-and-Install-Sheet.pdf?v=1679066798

I remember using something like this before Sol-Ark got their gen
exercise capabilities dialed in. I also remember setting a weekly timer on
my phone to manually run a customers generator via the app…

On Tue, Apr 7, 2026 at 6:39 PM Jason Szumlanski via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> It's a Generac NextGen. None of the Generacs (Evo, Evo2, NextGen) allow
> exercise with remote start enabled.
>
> I didn't install it - just got stuck with it, and after promising I could
> use EG4 to exercise, I got pie in my face.
>
>
> Jason Szumlanski
> Principal Solar Designer | Florida Solar Design Group
> NABCEP Certified Solar Professional (PVIP)
> Florida State Certified Solar Contractor CVC56956
> Florida Certified Electrical Contractor EC13013208
>
>
>
> On Tue, Apr 7, 2026, 6:14 PM jay via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> what generator do you have?
>>
>> jay
>>
>> On Apr 7, 2026, at 1:25 PM, Jason Szumlanski via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>> Here we go again with a manufacturer providing poor and misleading
>> documentation. The EG4 GridBOSS manual says:
>>
>> *The GridBOSS should use start/stop relay 1 in the normally open
>> connection. Start/stop relay 1 can be controlled manually or by battery
>> SOC/voltage logic within the EG4® Monitor Center. The generator can also be
>> configured with warm-up, cool-down, and exercise time.*
>>
>> I just learned that there is, in fact, no automatic scheduled generator
>> exercise feature on the GridBOSS. This is a real problem because many
>> generator controls disable the onboard exercise function when
>> remote-start capability is enabled.
>>
>> So what is "exercise time" in EG4's world? Apparently, that means you
>> can set a duration for the generator to run when you MANUALLY start the
>> generator from the app.
>>
>> Hope this saves someone else a big headache, hours of research, and
>> clueless tech support.
>>
>> Any thoughts on a simple external relay in parallel to accomplish this
>> function? I was thinking about a Shelly connected to a smart load for
>> power in the GridBOSS. It just needs to be a programmable relay to close on
>> a schedule. How reliable are Shelly relays for scheduled tasks?
>>
>>
>> Jason Szumlanski
>> Principal Solar Designer | Florida Solar Design Group
>> NABCEP Certified Solar Professional (PVIP)
>> Florida State Certified Solar Contractor CVC56956
>> Florida Certified Electrical Contractor EC13013208
>>
>>
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