Also interesting is the different formats where these are...

Also interesting is the different formats where these are installed. Some are installed at end of each string of solar panels and others grouped together. Saving in current loss and cabling? I wonder what voltage output each unit is doing or if they are using transformer at end of strings etc. Just interesting to observe the different approaches and that they have built the whole enclosure / case as a bunded ( to hold sulfuric acid based fluid in case of spill ) transportable modular unit. Tanks in lower part and stack on top.

Guess end of individual string is something tesla can only do with piped cooling or individual cooling for each unit in hot climates.