[RE-wrenches] Over voltage error message

[bob at midnitesolar.com]

The Classic can overshoot but not very much, normally.

I would try this...

Sell to grid while watching the battery voltage and then turn the 
inverter breaker off

and see what the battery voltage does.  If the battery voltage rises to 
the mid 60V range

from a low sell voltage of around 52 or 53V, then something is really amiss.

If the system has been in service for some time, you might also check 
the capacity of

the batteries.  They should not easily allow 65-ish volts.  I don't 
think that the

FM's communication can respond  to keep spikes from happening any better

than it could without communications.  Data packets just don't come all that

often.

boB


On 7/18/2017 5:25 PM, Jerry Shafer wrote:
> Wrenches
> The Outback system with grid connection would be programmed for grid 
> connection all the way from the inverter to the Outback FM CC, using a 
> midnite CC this option may not be possible resulting to a CC push if 
> the grid disconnects resulting in a spike. the disconnect might be 
> from settings to tight or as it was said utility spikes. You might 
> thing that the battery bank should take it up but internal resistance 
> in the battery or to it may prevent it. The other thing I would look 
> at is connections, if there is any resistance in a connection this 
> could happen.
>
> On Mon, Jul 17, 2017 at 2:36 AM, Drake 
> <drake.chamberlin at redwoodalliance.org 
> <mailto:drake.chamberlin at redwoodalliance.org>> wrote:
>
>     Hello Wrenches,
>
>     My client reported seeing an overvoltage error message on her Mate
>     3 on a Radian system. The Radian is selling to the grid and is
>     being fed by a Midnite Classic 200. It has shown two spikes so
>     far, the last one going to 67 volts and lasting 1 second. The
>     batteries are Concorde AGM, 305 AH.
>
>     Does this momentary spike seem like a problem or a warning of
>     problems to come?
>
>     Thanks,
>
>     Drake
>
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