EEVblog > EEVblog Specific

EEVblog 1426 - This Problem can DROP Solar Output by 20%

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EEVblog:
Dave tracks down why his old 3kW system that was moved was now showing a 20% drop in output power at the same time every day.
Is it inverter temperature, inverter mains voltage, solar panel cracking, dodgy connection resistance, or shading?

SilverSolder:

That is a very interesting effect, amazing that such a small change in input is "amplified" in this way...   It would be good to understand what those max power tracking algorithms actually do.

MasterTech:
Nice.
By leaving the mast down not only you win the extra solar power but also the time not wasted watching the useless content in the TV.

Dread:
As Dave stated the problem he was having was almost totally due to the fact that he is using an older SMA inverter that does not have the SMA patented fix for their dodgy software, it's called "Shade Fix" and yes they actually Patented it!  Almost all the newer inverters do not have this issue and it's only a few of the older models that suffered from it.

THE STRING VS MICRO INVERTER SHADING EFFECT LIE HAS BEEN BUSTED!

Just about six weeks ago a couple of Australian Installers released controlled scientific test to once and for all prove that there is ZERO benefit to Micro Inverters when it comes to Shading.  Here is one of the main Videos but you can find the others easily.



Next up is the big Clipping Lie.   If you have batteries or sell back to the Grid then clipping is costing you a lot more than they want you to believe.


Dread:
More Tests by a different installer in a Sunnier Part Of Australia.

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