The Midnite Solar Classic Controller used to be able to be positive
grounded. The Classic 250 can do five 60 cell modules in series.
Ray Walters
Remote Solar
303 505-8760
On 10/14/20 3:18 PM, Dave Angelini Offgrid Solar wrote:
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/ e-mail [email protected]
<mailto:[email protected]> text 209 813 0060*
On Wednesday, October 14, 2020, <[email protected]
<mailto:[email protected]>> 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
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