Aux 1 Waste Not High, Float High or PV High not turning off

Started by phxmark, December 19, 2013, 11:07:39 AM

Previous topic - Next topic

phxmark

Only in the morning, two of the lower panels are about 10% shaded.  During the day from about 9 AM on, full sun on the panels.  All panels are the same model and wattage.  Legacy still works better than solar, even at full sun.
Magnum MS-4448PAE
Midnite Solar Classic 200
6 SunPower E20 327W Panels.  3 Strings/2 Panels each
4 200ah AGM Batteries
WhizBang Jr.
Sun-500G Grid-Tie Inverter Controlled
by Aux 1 using a SSR
Emerson/ASCO 185 100 Amp Automatic Transfer Switch
http://midniteforum.com/index.php?topic=1564.0

Westbranch

Is it possible you have a poor connection other then the rewired PVs?
KID FW1811 560W >C&D 24V 900Ah AGM
CL150 29032 FW V.2126-NW2097-GP2133 175A E-Panel WBjr, 3Px4s 140W > 24V 900Ah AGM,
2 Cisco WRT54GL i/c DD-WRT Rtr, NetGr DS104Hub
Cotek ST1500 Inv  want a 24V  ROSIE Inverter
OmniCharge3024  Eu1/2/3000iGens
West Chilcotin 1680+W to come

phxmark

No poor connections.  At full sun, the controller is pulling a little over 17.1 amps from the array.  The Imp for the panels are 7.95 amps so the amps coming from the array is above the panels label Imp.
Magnum MS-4448PAE
Midnite Solar Classic 200
6 SunPower E20 327W Panels.  3 Strings/2 Panels each
4 200ah AGM Batteries
WhizBang Jr.
Sun-500G Grid-Tie Inverter Controlled
by Aux 1 using a SSR
Emerson/ASCO 185 100 Amp Automatic Transfer Switch
http://midniteforum.com/index.php?topic=1564.0

dgd

Quote from: phxmark on January 01, 2014, 02:55:43 PM
No poor connections.  At full sun, the controller is pulling a little over 17.1 amps from the array.  The Imp for the panels are 7.95 amps so the amps coming from the array is above the panels label Imp.

This is not that unusual. The mppt process may have found a  best input wattage point where the current is higher but the voltage is lower than the rated mpv of 90volts.
Although with 1300+ watts from a near 1500watt array there is probably not a wiring issue.
When you have the Classic in Solar mode what is the mppt scan interval set to? (from local app)
dgd
Classic 250, 150,  20 140w, 6 250w PVs, 2Kw turbine, MN ac Clipper, Epanel/MNdc, Trace SW3024E (1997), Century 1050Ah 24V FLA (1999). Arduino power monitoring and web server.  Off grid since 4/2000
West Auckland, New Zealand

phxmark

Solar MPPT Scan is set to 3 minutes which is the default.  I am using Legacy and have it set to 3 minutes also and set the Watt percentage to 15%.  I have read somewhere on here that it is recommended to set set the Watt percentage between 10% and 25% for solar and to adjust it up or down for best performance.  It was set at the default which I believe was 10%.  It actually performs better at 15%.
Magnum MS-4448PAE
Midnite Solar Classic 200
6 SunPower E20 327W Panels.  3 Strings/2 Panels each
4 200ah AGM Batteries
WhizBang Jr.
Sun-500G Grid-Tie Inverter Controlled
by Aux 1 using a SSR
Emerson/ASCO 185 100 Amp Automatic Transfer Switch
http://midniteforum.com/index.php?topic=1564.0