Enecsys Monitor kWh vs. Generation Meter kWh

[ovonrein]

I have 8 E SMI-240/G83 inverters installed April '11. No 7 inverter was replaced Nov '11. The new inverter is a 72, which I queried with E who confirmed this is correct and that 60's are not compatible with my Sanyo HIT H250E01 panels.

I read into this that the original 8 inverters were of the -60 variety, ie the "wrong ones"?  So when a "right" -72 was substituted later, obviously the then installer was so concerned about the unsuitability of the original installation that he immediately proceeded to swap all of them?  Or if he wasn't, then you are?  Or if you aren't, then Enecsys is?

In winter, a tiny amount of shade drops the output to 10W for my original panels or 14W for the replacement

So we learn that the -60 is still less efficient than the -72?

[martin]

Herrumph! Just a few thoughts - I've not been following this thread closely, but it would appear reasonable to urge caution and restraint for several reasons, not least the laws of libel. It would appear that the Enecsys people have "come to the wicket", are addressing the matter, and seem to be displaying a remarkable level of "reasonableness" in view of the fact that it has been aired publicly on the forum (which to my mind is refreshingly open and honest of them), So all I can ask is that everybody involved takes a step back, counts to ten, and at least awaits the outcome of the present dialogue before "launching off" on the subject........
 As I know all too well, things can get blown out of all proportion on a forum, due in no small measure to the lack of "eye to eye" contact - "smileys" can help a little to hint that you've "had a twinkle in your eye" when you've posted something, but it doesn't often impart all the subtle nuances of what we're trying to convey...... (where's the "please play nicely" smiley when you need it? )

[Wickham]

This long thread has been almost entirely theoretical, apart from my short experiment.

Perhaps it would help if just one of Jez's micro-inverters was swapped for a 60 cell version, putting it in an "average" situation, like in the middle of others.

Perhaps he could get a free one on loan so that Enecsys could also monitor the difference with the 72 cell versions.

You should be able to mix different micro-inverters as they output AC, in the same way that you can now mix panels sizes and specifications as long as the panel matches its micro-inverter.

I got a different micro-inverter as a replacement - 240W in lieu of 200W for the original ones - and it is performing differently (although both are 72 cell versions) but overall there doesn't seem to be much difference in the total generated so far.

It does seem that whether a 60 cell or 72 cell version is suitable for Jez's Sanyo panels is dependent on the weather, amount of shading, etc., which varies from minute to minute, week to week, so it may not be possible to say which is preferable in all situations, except after a long trial.

[jez54]

For various reasons - entirely unconnected with this thread - I've not been able to do the experiment I intended today (shame - it's been V sunny)

I trust tc was not similarly prevented, and that we'll be hearing his findings soon.

[jez54]

There, that's better.
Now that 100% of 1 voters have decided on behalf of us all, this thread is hereby closed.
Someone start another.