I would first isolate your system. turn off all loads on the inverter,
REPOLE. check the AC input AT the inverter, checking ALL AC input
connections, pull on the wires , make sure they are tight. Ck the AC voltage
at the generator then at the inverter.
Is it possible to run a separate wire
Hello and happy new year fellow listers... I am happy (as are my batteries)
for longer solar days as we move forward around the sun...
I am faced with yet another client who is surprised that I don't have a
maintenance agreement or plan to offer them (similar I guess to such plans
Hell Geoff,
Maintenance agreements are no more easy money than any of your other labor
earnings. Price maintenance work the same as other specialized labor and factor
in travel time and costs and perhaps a little something extra for your client
(who has become more than just a customer). The
Thanks Joel -
I left unsaid how this can all differ with different customer classes (large
commerecial VS rural off-grid etc). The obvious maint of batteries... PPA
agreements becoming a new type of entity... The benefits of remote diagnostics
via fat spaniel, win-verter and others...
Kurt,
The NEC provides for, and the AHJs have accepted the use of the
connectors as a form of disconnect. Of course, each branch is also
connected to a dedicated branch overcurrent device (circuit breaker).
On the DC side, since only one module is connected to each inverter, the
connectors
Kurt,
I worked on a elderly housing site in northern Ca in which we connected to
the main service on each structure (total of 12) or building. These were
about 2kw each and combined over three or four apartments and in some cases
a full flat roof with a tilt up to 6kw. All of them were grid tied
Thanks Bob, these are really great reference articles. The equation for Vmp
had four terms, three of which are temperature dependent. So I think we put
that issue to bed. The reason that this issue is so important for us is
this: if Vmp is temperature dependent, then there must be some loss when
I have pondered this problem often. Here's my thoughts: If you could
disconnect the two orientations and monitor them simultaneously, in
the morning the easterly array would have a higher Vmp while the
westerly array would necessarily be lower. This relationship would
change throughout the
Peter,
What are you modelling for annualized soiling loss? What is the basis for
that value, margin of error? With industry standards for soiling in the
range 5 to 7%, are you not seeing the forrest for the trees, looking so
closely at effects of multiple orientations of separate strings.
Go
Date: Mon, 29 Dec 2008 11:32:42 -0700
From: Starlight Solar, Yuma, AZ la...@starlightsolar.com
I have pondered this problem often. Here's my thoughts: If you could
disconnect the two orientations and monitor them simultaneously, in
the morning the easterly array would have a higher Vmp while
--On Monday, December 29, 2008 8:29 AM -0800 Marv Dargatz
mdarg...@enphaseenergy.com wrote:
The NEC provides for, and the AHJs have accepted the use of the connectors as a
form of disconnect. Of course, each branch is also connected to a dedicated
branch overcurrent device (circuit
--On Monday, December 29, 2008 10:06 AM -0700 Jason Lombard
openhandso...@gmail.com wrote:
I worked on a elderly housing site in northern Ca in which we connected to the
main service on each structure (total of 12) or building.
I'm assuming all those buildings have service billed to the
Ron -
Tech support is open today and should be able to help you troubleshoot
this in a step-by-step process that will discover the root problem.
I am a bit confused by the descriptions of the events and have the
following questions and comments:
When you tested just the inverter
Hi Geoff,
Hung over? Naay. I'm too excited about PV in the coming year. Washington has
finally shifted away from Reagan's anti-solar. Here's hoping that the rest of
the US out-shines California's booming solar industry.
Model your battery maintenance agreements similar to UPS agreements. Some
On Mon, Dec 29, 2008 at 12:25 PM, Kurt Albershardt i...@es-ee.com wrote:
--On Monday, December 29, 2008 10:06 AM -0700 Jason Lombard
openhandso...@gmail.com wrote:
I worked on a elderly housing site in northern Ca in which we connected to
the main service on each structure (total of 12) or
Mark,
What do I tell my clients about soiling? 96% if they clean them once a year.
If they clean them on the 4th of July, they'll do a percentage point or two
better.
The Forest and the Trees: That's just the point. A bunch of trees makes a
forest! A PV system can suffer from a score of small
Peter,
The more you work with IV curves, the better you will understand them. Since
most people don't get the opportunity to use an IV curve tester, the
understanding of the curves may need some help. As you pointed out in your
constant temperature information below, it showed the MPP to be 2
HI Christopher,
I don't know if this is similar.
I have a stacked 3648 unit, running in parallel at 120v. Being fed
from a 240v generator with a X-240 as stepdown. Generator is a Onan
8.5kw. ( don't ask why its a long story)
Unit did work OK for about 2 yrs.
When you start the
Hi Ron, Jay and all...It is easy to blame the generator because it is
usually the generator causing the problem.One thing that we have run
into on occasion is that the generator has been re-adjusted and tuned up but
that the generator repair person does this only at an idle load.We
Hi Kirpal,
I understand and have sure seen lots of fixed generators that we not
fixed.
The guy who sells most of the generators I use used to be at Stanford
labs, smart guy.
I agree but I have never seen this type of problem, that is fixed by
turning on a few lights.
And to be clear,
Geoff,
Years ago we tried maintenance agreements. We gave up on the idea. Some of our
lessons to share here:
First, we never worked out a fair approach. There's no fixed charge that was
both fair to client and to us. We finally realized that the small percentage of
customers who were interested
Hi Chris,
My answers appear below:
On 29-Dec-08, at 10:41 AM, Christopher Freitas wrote:
When you tested just the inverter without the generator running –
you stated that there was a noticeable flicker every 20 seconds –
THE GENERATOR WAS RUNNING, IT'S JUST THAT I TURNED OFF ALL THE LOADS
22 matches
Mail list logo
