Sounds like they need a 20 Kw Kohler. Hot Tub in the future? They'll
love their Kohler. The Generac is just way too small to even consider IMHO.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 10/1/2013 8:11 AM, Larry Crutcher, Starlight Solar Power Systems wrote:
William, Chris, Ray, Allan, et al.
Gen support would be ideal but this inverter setup will be a quad pack of
Magnum 4024PAE (120/240 split; 16kW). Their New MSH inverter is single phase
only and can not be stacked.
While disabling load(s) is the antithesis of the desired outcome, I'll review
this possibility further.
Using a separate charger could work but it would need to be about 200A @ 32V
which would add quite a bit of cost and be hard to sell since the Magnum
inverters already have 4 high quality charges included.
A larger generator might be necessary if the customer won't agree to load
shedding. Their plans are to expand the loads over time, operate a business,
install a hot tube and more. Of course I have pushed the concept that
conservation is paramount. The PV array and inverters are being oversized now
for the future growth.
My ideal solution...Since Magnum inverters monitor the AC input and control it
based on quality of power, it seems to me that there could be a setting for
disconnecting the AC input if loads exceed a setpoint. Change in control
software would be great.
Thank you,
Larry
On Sep 30, 2013, at 4:14 PM, William Miller <will...@millersolar.com> wrote:
Larry:
Maybe a better approach might be to use an inverter with "Gen-support."
That is unless a system already exists that does not have this feature.
Plan B: use the gen start signal to disable one or more of the larger
loads.
I know this is not what you asked for, just trying inject some different
ideas.
William
-----Original Message-----
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Larry
Crutcher, Starlight Solar Power Systems
Sent: Monday, September 30, 2013 1:02 PM
To: RE-wrenches
Subject: [RE-wrenches] Generator automatic disconnect
Wrenches,
I want to use the Ecogen 6kW generator on a large off grid system. The
location has very few overcast or rainy days and the generator will rarely
be needed. My concerns is nuisance tripping the generator output breakers if
the household load exceeds 6kW. The power system control has a feature for
reducing the AC current used to charge the batteries but does not have a
feature for disconnecting the AC input based on input load.
Does anyone have a solution for monitoring AC load from the generator and
disconnect it if overloaded? It must automatically reconnect after a short
timeout.
Thank you,
Larry Crutcher
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