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 [email protected] [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: ------ [1] http://members.sti.net/offgridsolar/ [2] mailto:[email protected] [3] mailto:[email protected]
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