Global Current Limiting

[Vic]

 Hi dgd,

Yes,   and from appearances,   this system will continue to evolve.

This system does have a number of Opportunity loads,  including an electric domestic water heater,   but only the Air Conditioning loads are controlled (manually).

It appears that the inverter pair runs close to maximum output on occasion ...   there had been some thought of changing-out the inverters ...   but,   then there should really be a change to 48 V (the batteries are about six months old) ...  and so on  ...  It is too bad,   but this is not an uncommon issue.

The system owner has been very,   very self-sufficient for a number of years,  so I had not tried to pry too much into the details of the system.   He is a Hammie Radio friend,  who's site is about 250 Km from here,   so have never seen the site.

Believe that the availability of a couple of pallets of PVs at a very good price  is really what started this adventure in Grid backup  PV power.

But,   the system seems to perform well,   and happiness abounds.   Doug is very happy with the MidNite Classics (and other MN products used there),   and the Support from MidNite.

FWIW,   73,   Thanks,   Vic

[Vic]

Vic,
It still exists. You basically need one WBjr per Classic that you want to back off. So lets say you have 4 Classics and each can do 50 amps (200 total) but you want to limit to 50 amps.

Put a WBjr on Classic 1, 2 and 3 and set all 3 to 50 amps as shown in the attached document. Essentially it is not truly global as it only manipulates the one classic that is why the need for multiple WBjr's

The above,  is the way that I understand how this current limiting does work.   I have not tested it,  or played with this function,  for too many years.

Halfcrazy (now using the Moniker, "FNG"),  and boB know much more about this function,  than I.

malkierian,  Glad that you were able to find this old Thread!  Vic