15 panel Sanyo N235W vs 16 panel Sanyo N240

[SolarCity]

If your system is unshaded like you say it is then I wouldn't recommend using OptiTrak. I certainly wouldn't say it was a good way of installing an 'extra' panel in a shaded area but SMA might tell you otherwise.

I'd love to experiment with the system on an array that received mild shading and examine how it performs with OptiTrak enabled and disabled.

 

[TrickyDicky101]

Thanks - you have been very helpful. I'm happy to go with the 15 N235s and Fronius 3.0 and have told my installer this. Problem is the supply issue. If I can get a firm date then I will continue with this system. If no firm date is forthcoming then i will revisit my options.

 

[SolarCity]

I'd recommend waiting. If your installer is getting his panels from where I think he is then I'd have thought they would be restocked before long.

 

[TrickyDicky101]

The panels just came into stock so my installer has placed the order for the N235s! I am happy

 

[whlphil]

Apologies this is bit late but one thing to watch with 15 in a string (on 3.0tl) is your minimum temps experienced in your area, as at default -10deg C you are right on the voltage limit 845v on an 850v max system voltage, not a big issue but has potential to void your warranty if damage is caused to system. That said they would have to find out damage was caused at less than -10 so it's slightly academic, but never the less worth pointing out if your in an area that is subject to particularly cold temps!