I have had 20kw, 30 kw, and 40 kw units in the field for years. The
warranty issue must be a newer thing. These are water cooled, 1800 rpm
units so I don't see what the issue is. All the units you listed are on
the small side.
So if an oil company deploys one of these remotely, is Kohler going to
tell them its not warrantied because its off grid?
Possibly the warranty has to do with long travel times to repair on top
of the high power draw?
We need larger generators on occasion for bigger systems. I'd say even
the 14Kw would be undersized for your project.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 10/2/2013 9:48 AM, Larry Crutcher, Starlight Solar Power Systems wrote:
Ray,
I heard back from Kohler and they told me that the 20kW has no warranty if used
off grid. They have 3 models for off grid use, 14RESA/L, 8.5RES and the 6VSG,
which have an 18 month warranty. Do you know anything otherwise?
Larry
On Oct 1, 2013, at 8:16 AM, Ray Walters <[email protected]> wrote:
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
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