What about building a 30 vdc system (5 x 6v batteries in series) and
adjust the settings on a Midnite Classic to work with that? How tight
does the 30 vdc output need to be?
On inverters, I've had trouble with the Suresine, basically not working
with GFCI outlets.
I keep trying different models of GFCIs, but they keep randomly tripping
on 2 different systems.
Morningstar's list of "approved" GFCIs doesn't list any currently
manufactured models, while calls to their tech support yields "Oh, that
shouldn't be a problem, it should work with all GFCIs..."
Way too many free trips out trying to fix this, so I may have to abandon
GFCI protection, or replace the inverters.
My suggestion for that small load: Exeltech 125. Better than grid
waveform, and I recently pulled one out of corroded outdoor enclosure
almost 15 years old: it looked terrible, but was still working fine. It
would also be lower cost and fit in a smaller enclosure.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 3/28/2016 2:24 PM, Dan Fink wrote:
Hi William;
30VDC is kind of odd, but 36VDC is common. The folks at Solar
Converters might be able to fix you up with a custom one, or perhaps
36V is within the sat unit's input range.
As for the inverter, I've never gone wrong with the Morningstar
SureSine. Slick little unit.
Dan Fink
Adjunct Professor of Solar Energy Technology, Ecotech Institute
IREC Certified Instructor™ for:
~ PV Installation Professional
~ Small Wind Installer
Executive Director, Buckville Energy
NABCEP Registered Continuing Education Providers™
970.672.4342 <tel:970.672.4342>
On Mon, Mar 28, 2016 at 1:44 PM, William Miller
<will...@millersolar.com <mailto:will...@millersolar.com>> wrote:
Friends:
I am designing a satellite data interface for a large off-grid
system for a state highway department facility. We will be using
the Outback Optics data capabilities along with equipment
manufactured by Control by Web.
I’d like to run the satellite system on a battery power source so
I can hope to use it when we need it most, when the power is
down. We have a separate 24 volt battery bank remaining from a
previous generator control system. The satellite system operates
on 30 VDC at 2 amps.
My first choice is to find a DC to DC converter from nominal 24
volts. Do any of you know of one that you could recommend?
My second choice is to use a small inverter. Can anyone suggest
one at this small wattage? I don’t know how good the power supply
is at rejecting waveform distortion so I presume an inverter needs
to be somewhat close to a sine wave.
Thanks in advance.
William Miller
Gradient Cap_mini
Lic 773985
millersolar.com <http://www.millersolar.com/>
805-438-5600 <tel:805-438-5600>
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