[RE-wrenches] Positive grounded arrays

[Dave Angelini Offgrid Solar]

I got around this for a client by adding an XW and the high voltage
MPPT. It has a positive ground option and it worked well. Scheider now has
a 100a Mppt version BTW. Pretty easy way to solve it and add batteries. Use
a Radian also if the FM100 can be negative grounded.  

Dave Angelini
Offgrid Solar
"we go where powerlines
don't"
http://members.sti.net/offgridsolar/ [1]
e-mail offgridsolar at sti.net
[2]
text 209 813 0060

On Wednesday, October 14, 2020,  wrote:
   Looking
for feedback on the following, any help would be appreciated;   Positive
grounded arrays(Sunpower systems) what is being used as an Inverter
replacement? Hard to get SMA's SBxxxxUS older style units that have the
built-in POS/NEG grounding capability... As far as I know the newer line of
Inverters from SMA will not work ; they are TL's and are not compatible.  
It would be tempting to "Un-Ground" the array and use the newer line of TL
Inverters from SMA. The Discon would need to do both POS/NEG lines;OK I
know of this being done with Arrays that are NEG grounded.   How much of a
Power loss from the array would be expected due to removing the POS ground
on Sunpower panels and run them Un-grounded ? Guessing say 15 to 20% ?  
This may be a solution that the customer would go along with short of
replacing the entire system.         Best Regards Louis Segarra  Tech
Department/Field Operations Solar Cowboyz (530) 273-4895 (916) 212-0282    


Links:
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[2]
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[3] mailto:louis at solarcowboyz.com
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