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

[Daniel Tittmann]

there is a MNSPD 300 AC and a MNSPD 300 DC.  are wired into the system.

this is a new system.  Has been happening since commissioning.
it is possible that the generator is charging during those morning hours as
there are likely morning loads, coffee pot, but not always as the customer
just went on vacation and the breaker tripped while he was gone.

On my first return visit I re routed the controller battery + from the
battery + buss bar to the battery + on the battery bank itself as this had
solved an similar issue in the past.

So for tomorrow's visit I am planning on taking a new breaker and a new
controller.  Is there anything else that I should replace?

Daniel Tittmann
CTO
Greenwired
www.greenwired.com
daniel at greenwired.com
707-923-2001 (office)
707-206-5088 (Cell)

On Thu, Oct 29, 2015 at 4:19 PM, boB at midnitesolar.com <boB at midnitesolar.com>
wrote:

>
> Larry, because these MPPT CC's are bi-directional (for efficiencies'
> sake), they can convert a large current
> at the battery side to a smaller current at the PV side if not adjusted
> right.  Normally this is just taken
> care of and reduced to a bare minimum by the controller watching the
> voltages and currents carefully.
> It is technically possible though for things to not work exactly
> correctly.  I am not saying that this is
> for sure happening, but it is possible.   The ramping up in battery
> voltage from the chargers should
> be plenty slow enough for this not to be a problem but I am wildly
> speculating that this could happen
> and cannot rule it out.  There may of course be something else completely
> different happening here
> though.
>
> If CBI breakers are being used, these are known to be extremely fast at
> tripping when overloaded.
>
> Also, what, if any SPDs are connected to the system ?
>
> boB
>
>
> On 10/29/2015 2:45 PM, Starlight Solar Power Systems wrote:
>
> After the Magnum Inverter/charger samples incoming AC power, they have a
> slight delay before starting the charger. Then, they ramp up current
> slowly.
>
> Even so, how will any current from any other source pass through the
> breaker unless the Classic is presenting a load? I suppose something else
> could be wired through the breaker but I’m guessing Daniel would have
> looked at that.
>
>
> <<<Curious Larry's PICTURE GOES HERE>>>
>
> Curious Larry
>
>
> On Oct 29, 2015, at 1:06 PM, <boB at midnitesolar.com>boB at midnitesolar.com
> wrote:
>
>
> ...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…
>
> boB
>
>
>
>
>
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