I would second Allan's comments; I've had huge wastes of time with folks
that had no idea what they needed. I think the most important
information to share with the customer at this time, is that the code
does not require a stand alone inverter system to meet the capacity
calculated for the service. The exemption has now moved from article
690, so it took me a little time to find it. Please read the new
710.15(A) . It defines that the inverter(s) only need to be able to
meet the single largest load. So Joe Residential Electrician may be
required to run a 400 amp load panel, but theoretically you could feed
that with a single 4 kW inverter, as long as it could start the well
pump, for instance.
You really want to start right away trying to identify and reduce
loads. I regularly coordinate with the plumber on the well pump and
circulator pumps, work with the appliance supplier to make sure
everything is reasonable and Energy Star rated, and then make sure all
lighting is LED, and there are no crazy loads like hot tubs, 3 ton Air
Conditioners, or electric heating elements, hot plates, etc. Ground
source heat pumps are another no no, people think they are really
efficient, but that's because the energy needed to run the pumps is not
included in the calculations. The pumps can take up to 2000 watts of
power for many hours/ day.
I charge a consulting fee; if they don't want to spend a few hundred
working out a load analysis and overall electrical system design,
they're probably not going to be good customers later.
Ray Walters
Remote Solar
303 505-8760
On 7/23/18 6:29 PM, Allan Sindelar wrote:
Aaron,
In thirty years my largest off grid residence (2005 install) had four
Outback VFX3648s, with the inner two in the Quad Stack included
primarily as slave battery chargers. Principle One still holds, even
with today’s numerous exceptions: electricity is a high quality form
of energy, best suited to specific uses - lighting, electronics, drive
power. Shift (most) bulk uses of electricity to other forms of energy.
I wouldn’t spend my unbilled hours designing a system to meet an
arbitrary 200A service.
Hope this helps,
Allan Sindelar, Sindelar Solar
On Jul 23, 2018, at 4:35 PM, Peter Giroux <pgir...@mindspring.com
<mailto:pgir...@mindspring.com>> wrote:
Aaron
Can use up to 8 radians "stacked " through their hub. One mate
should control all of them. The Radians are solid and deliver a
very good value.
thx
peter
----- Original Message -----
*From:* Aaron Mandelkorn <mailto:reoso...@gmail.com>
*To:* RE-wrenches <mailto:re-wrenches@lists.re-wrenches.org>
*Sent:* Monday, July 23, 2018 7:28 PM
*Subject:* [RE-wrenches] Large off grid
What do you say to the person who wants "200 amp" electrical
service from their off grid system. I generally use Schneider
xw+ inverters. Is it even possible to put 4 or 6 of them
together? How many radians can be put together? I'm curious to
know how others would proceed or is this to unreasonable to spend
my time on.
Aaron Mandelkorn
President / Founder
Renewable Energy Outfitters
www.reosolar.com <http://www.reosolar.com>
Off Grid Depot
www.offgridnow.com <http://www.offgridnow.com>
970-596-3744
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