Sunny Boy Control over AC Lines [RE-wrenches]

[Robert Warren]

Mark,
 I have installed and used lots of the powerline comm units and found 
them to be a whole lot easier to install as I don't have to run data 
cable, and I had few errors as it communicates only at 1200 BAUD and 
does a parity bit check each time to make sure the full packet of data 
is recieved. If I got a rate of 10% lost packets, it was no big deal as 
I would always still have my daily kW/hrs and whatever other voltage and 
currinet readings I needed from the inverters. I had one big 
installation for the Canono HQ in London with 60 inverters all with 
Powerline feeding into a 3 phase supply. We used phase converters and a 
noise filter, all available from SMA, and it performed well over the 
first two years. Mind you, this was an office complex with over 400 
workers, all with kinds of computers, printers, copy machines, 
flourescent lighting, and all kinds of advanced electronic gizmos, since 
it was Canon, and still the Powerline data was reliable.
 I don't think many people in the US have much experience with it like I 
did over 3 years in the UK, but I would say, check it out. It works! By 
the way, there is a rather narrow defined bandwidth for Powerline modems 
from Sunnyboy inverters, so they work at a different frequency that 
Powerline Baby Monitors. 
Robert Warren


markb at cobaltpower.com wrote:
> 
> 
> 
> Anybody have experience with the SMA Sunny Boy Control unit, using power 
> line communications from the inverter to the control unit?  Sure would 
> be convenient if it works, but I hear the communication is unreliable 
> and there are frequent trouble calls.
> Thanks
> _______________
> Mark Byington
> President
> Cobalt Power Systems, Inc.
> Tel 650-948-9574   Fax 650-948-9573   Cell 415-298-1947
> markb at cobaltpower.com   www.cobaltpower.com
> 
> 
> [Non-text portions of this message have been removed]
> 



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