[RE-wrenches] Classic 150 100 amp output breaker tripping?????

Thu Oct 29 09:55:01 PDT 2015

Daniel,

Very strange problem.

While I agree that you should try replacing the 100A breaker, I doubt that
it’s the problem. Why would a breaker trip at low amperage in the morning,
but not trip at noon when the amperage is higher?

At early morning turn-on, the voltage might be too high, but high voltage
is not going to trip a breaker. Current trips a breaker, not voltage.

My guess is that something is going on inside the Classic controller.
Larry’s “wild guess” might be on the mark. Do you have another Classic to
swap out with?

Brian Teitelbaum

AEE Solar

*From:* RE-wrenches [mailto:re-wrenches-bounces at lists.re-wrenches.org] *On
Behalf Of *Daniel Tittmann
*Sent:* Wednesday, October 28, 2015 3:05 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Classic 150 100 amp utput breaker tripping?????

An update on this issue:

On my initial visit to diagnose this problem I changed the AGS settings
higher volt start and % state of charge start.  The report from the client
is that this has fixed the AGS issue.  So now I am just dealing with the
100 amp breaker tripping.

The trip time from the client is when the sun hits the panels and once
reset for the day it will not trip until the next morning. What could cause
this?

You are all right that the first step it changing out that breaker that
will be the first on the list when I am back on site.  I hope that is the
only issue because as usual this system is 2 Hrs from the shop with no cell
or internet coverage.

Thanks for your input.

Cheers-

Daniel

Daniel Tittmann

CTO

Greenwired

www.greenwired.com

daniel at greenwired.com

707-923-2001 (office)

707-206-5088 (Cell)

On Mon, Oct 26, 2015 at 10:25 PM, Mac Lewis <maclewis1 at gmail.com> wrote:

Hi Daniel,

Do you know what the error is on the AGS? What are the start set points
that you have? Jay could be on to something if the battery voltage is
collapsing before the generator can start, the cc current could be high. Do
you know specifically what time of day the breaker is tripping?

I'd check the Midnite logs and consider starting the generator sooner.  Is
there large voltage swings (this could indicate bad battery or large load)?
Make sure the wire is cleaned and torqued properly onto that breaker.

How big is the battery bank and what is the tilt and azimuth of the panels?

On Oct 26, 2015 11:05 PM, "Jay" <jay.peltz at gmail.com> wrote:

Hi Daniel

Is this a new classic with OCP? Or maybe they don't have it anymore?

What it sure sounds like like is a big load on the batteries, it hits
faster than the AGS can start, and the caps in the classic are dumping into
the super low battery voltage. If this is happening in the AM, guessing
with enough light to get the CC alive

If there is a trimetric, you can measure the lowest voltage which should
give you some good info. Super low volts might mean a bad battery or too
big a load or both.

But I don't believe it's the other way around that the classic is causing
any issues with the AGS/inverter

You could always try another CC and see what happens

Jay

Peltz power

On Oct 26, 2015, at 6:30 PM, Daniel Tittmann <daniel at greenwired.com> wrote:

Hive mind-

hoping you all can help me solve this mystery issue.

System:

Magnum double panel with Parallel stacked 2x4448 pae inverters.

Classic 150 charge controller wired with an NMEPV 50 (din rail) and
NMEPV100

18 - 245 watt solar modules (6x3). (not over powered)

Issue:

every morning the 100 amp din rail breaker is tripping.  from what I can
gather simultaneously the magnum RTR shows the AGS go into error.  Re set
the breaker and the solar works fine for the rest of the day.

Not 100% sure the AGS has worked (under normal operation) at all other than
at commissioning and recent testing.

Of course on site i cant get it to fail.

Tested the AGS by setting start voltage to 48.2 vdc and put the system
under load....... voltage drops and generator turned on with no pv-> Batt
breaker issue.

last visit, chasing one theory, I re routed the battery + from the mnpv100
directly to the battery  + terminal as opposed to the battery + bus bar in
the inverter panel still didn't solve the problem.

I cant figure out if it the classic causing the issue or if it is the
inverters and the AGS.

Any input would be appreciated.

Thanks

Daniel

Daniel Tittmann

CTO

Greenwired

www.greenwired.com

daniel at greenwired.com

707-923-2001 (office)

707-206-5088 (Cell)

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