Hi,
I want to show you how to pack as maximum as possible in a small room of a house. 
There are 12x Pytes 48100 in 2 Racks and between them 4xPylontech US2000. The larger ones are connected to 3x Multiplus2 10000 and the smaller to 1x MP2 5000. 2 Cerbos are controlling it. Charging and discharging is limited to 17kw due to temperature meanings and because more is not nessessary for the owner. The house has a 32kwp photovoltaik system. The produced energy is used for a large Pool with 27 celsius 10 month of the year and 2 electric vehicles, one charged mainly in the night and with that the grid is only nessesary about 3-4 months the year, and there also mainly for the cars. Owner calculated that the ROI is after about 3 years, so good for environment and for his pocket And for me, nice to care about.
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Well done
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Beautifully built and the space well used. 
You could consider buying a small split air conditioning system for the room. I think the 600W would still be left. 
But you should definitely change the wiring to diagonal … !!!
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You’re definitely right, I will change this. So always good to show what you’ve done to somebody else with knowledge because you typicaly miss something during work 
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With 5xcurrent GobelPower GP-SR1-PC200 (16s, 314Ah, 15kWh) you would also get 75kWh. I have 4 older one in a 24 HE rack (4x 16s, 280Ah, 14,4Kwh)
While lifting them into the shelve…
And finished…
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For small packs of 2 units, diagonal wiring does not seem absolutely necessary to me.
From 3 units yes it is useful to meet