[RE-wrenches] Classic 150 100 amp output breaker tripping?????
boB at midnitesolar.com
boB at midnitesolar.com
Thu Oct 29 13:06:07 PDT 2015
This is probably not the breaker at fault. Could be, but just doesn't
seem like the only thing
I would suspect.
Do you know if the generator might be turning on and charging the
battery through the
inverters at this time in the morning ? Since you were talking about
the AGS it makes
me wonder... That would be a good clue.
There is a possibility that a simple (you know how "simple" goes
sometimes !) adjustment that
can be done on the Classic if it turns out to be, say, a surge in
battery voltage from the generator
starting up and causing a reverse current through the battery
terminals... The inherent circuit design of
higher efficiency converters can cause this. Send me / us an email if
you would like to try that.
This is done through a special communications mode using the MNGP display.
Also, is this a new system or has it been running for a while and just
now seeing this problem ?
boB
On 10/29/2015 11:13 AM, boB at midnitesolar.com wrote:
>
> You don't want to drive for hours and hours to do something that might
> not fix the problem.
>
> Without knowing exactly what is happening, I would bring a spare
> Classic and also a new breaker
> which I think I heard we were sending you....
>
> If the Classic is plugged into the internet, there is the possibility
> of monitoring it to see what is
> going on just before the breaker trips. I would just bring another
> one in this case if you have one...
> Otherwise, call our support and see if there is something they can do
> to help in this regard.
>
> Strange things do happen in this industry ! Troubleshooting isn't so
> bad as long as you don't have
> drive or take a helicopter a long ways just to find that the unit is
> turned off.
>
> boB
>
>
>
> On 10/29/2015 9:55 AM, Brian Teitelbaum wrote:
>>
>> 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
>> <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 <http://www.greenwired.com>
>>
>> daniel at greenwired.com <mailto: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
>> <mailto: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
>> <mailto: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
>> <mailto: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 <tel:707-923-2001> (office)
>>
>> 707-206-5088 <tel:707-206-5088> (Cell)
>>
>> _______________________________________________
>> List sponsored by Redwood Alliance
>>
>
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