[RE-wrenches] EG4 GridBOSS Generator Exercise

[Jason Szumlanski]

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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