[RE-wrenches] MidNite Solar SMA Relay Board (MNSMARB)

[boB at midnitesolar.com]

After spending a lot of time and money to make the SMA Sunny Island work 
with a grid tie inverter system of twice the Sunny Island capacity we 
dropped the project. The problem we had is that the system is 
complicated and we were spending far too much time working with the 
people in the field as well as with our own internal wiring shop. We 
have made changes in our own shop and can now better build these 
systems. We have one customer that uses a lot of these because he 
insists on putting 20 to 24KW of PV on double stacked AC coupled Sunny 
Island systems. We have had no issues at all in the field when the SMARB 
system is properly installed. We are very leery of opening this back up 
to installers because it is quit often being installed by people who are 
not really qualified to do this in the field. We have begun building 
these once again for this one customer on pre-wired systems. We doubled 
the price though since we were losing money at the old price. We do not 
know if we will open it up for sales as a kit to be installed in the 
field? For a competent installer (old off-grid guys), it is a snap. We 
welcome your comments as we pride ourselves on coming up with solutions 
for problems. This one turned out to be tough even for us, but once we 
had it all figured out, it became a nice product, but had a bad history 
of support due to a moving target of how to make it work.

Robin Gudgel

MidNite Solar



On 6/9/2015 8:33 PM, Gary Willett wrote:
> Fellow Esteemed Wrenches:
>
> Working on a on-grid battery back-up system with generator where 
> client wants to use SMA Sunny Island / Sunny Boy.
>
> Anybody know where to find the MidNite Solar SMA Relay Board 
> (MNSMARB), or a functional equivalent? It is intended to be installed 
> inside the MidNite SMA E-Panel.
>
> I searched the MidNite site and found the attached document, but no 
> other info.
>
> Thanks!
>
> Gary Willett PE
> Icarus Engineering / Solar Services

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