Lightning arrestors [RE-wrenches]

[Travis Creswell, Ozark Solar]

Hello John.,

Please deifne "near the array" a little better and do you have any
recomendations for the DC arrestors for the Sunny Boy?

Thanks
Travis Creswell
Ozark Energy Services

----- Original Message -----
From: "John Berdner" <jberdner at sma-america.com>

> This was done to meet the requirements for a large European project.
> Based on out testing we see no measurable difference in failure rates
> for units with and without dc surge arrestors >>IF<< "the dc runs are
> kept to a minimum".  This is why we suggest mounting the inverter near
> the array.
>
> The US units do not include dc arrestors.  We have only seen a couple of
> inverters with what we think are lightning damage and it is impossible
> for us to say if the surge came from the dc or ac sides.  In lightning
> prone areas we are more concerned about surges from the ac side and
> suggest whole house surge arrestors mounted at the utility service
> location.

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