Hi Ray
This house won’t have an AGS, manual start only.
And your comments exactly, having to wait until the next day when hopefully there is enough sun to charge the battery is iffy.
Or they could do the inverter bypass switch.
Again I’m back to why is it a worse idea to install a relay on the AC?
Thx
Jay
As to the sol ark which I never thought about it being in a sense an AC coupled system. IE if the inverter is off it won’t charge. I guess you’ll have to install an external battery charger?
On Jul 20, 2023, at 5:08 PM, Ray Walters via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:
The aux off is only if the generator doesn't start. You need to
set the gen start voltage higher. Aux off is last ditch shut down,
set for 44v for lead acid, or 47 to 49v, depending on the battery
and inverter. Hopefully DC coupled PV will raise the voltage
enough to turn the inverters back on the next day.
This is my concern on Solark installs, I just noticed that the
inverter won't pass through PV, if it hits its LVD set point.
On 7/20/2023 3:04 PM, jay via
RE-wrenches wrote:
HI All,
I wanted to revisit this thread for one reason.
If you turn off the inverter at the remote on/off
with the AUX relay, then starting the generator won’t have any
impact as the inverter is off.
So someone will have to go and reset the AUX relay.
Vs
If you do a relay on the AC output, when you start
the generator, it will start charging, raising the battery
volts, causing the AUX relay to close AC output relay and you’ll
have power in the house.
Am I missing something?
thanks
jay
Here is the last email I think:
Mac,
I think
you've got an elegant solution to the problem. All you need
is an
inexpensive relay and to program the Aux output for loadshed.
I believe
shutting down the inverter with the remote on/off contacts is actually less
stressful on the inverter than opening a relay or contactor on
the load side.
Kent Osterberg
Blue Mountain Solar
On 7/11/2023 5:19 PM, Mac Lewis via RE-wrenches wrote:
Hello Wrenches,
I'm trying
to solve an issue with an older Outback FX system. It's a quad stack
of Outback 3648 FX inverters and he has a couple of Fortress
eVault and an unreliable generator. The LBCO setting can't
go high enough to cut out before the eVaults cut out
so he occasionally will have to direct charge the eVault
to get things running again.I'd like to use a 12V Aux relay
logic to trip the primary inverter on/off contacts before
we go into battery shutdown so the solar has a chance to
recover the system. Pretty simple overall but I wanted to see if there
are any known ill effects of doing this with substantial load on the
system. Of course, I can use a power relay but this may be better.
Thanks for your input!
--
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