EMS
Alerts
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All days
Energy lost to stuck trackers · per day
click a bar to open the day
Worst days
| Day | Lost | % | Faults |
|---|
Strings over all days
Which strings are bad
| String input | MPPT | Side | Charge vs. sibling | Weak | Dead | MPPT stuck | Last problem |
|---|
Sorted worst first. Charge vs. sibling is the string's total charge over all days relative to the other string on the same MPPT; a healthy pair stays within about ±5 %. Weak counts days on which the string stayed below 70 % of its sibling for at least 2 hours (shade, soiling, a damaged module or bypass diode), Dead days below 10 % for 30 minutes (fuse, connector, cable). MPPT stuck is shared by both strings of the MPPT: days and kWh lost to the tracker sitting on the wrong power maximum. Click a row to open its last problem day.
Day
Production
–kWh
Lost to stuck trackers
–kWh
Stuck time
–h
Faults
–
dead / weak strings, MPPT offline
West · MPPT voltage
East · MPPT voltage
West · power per module
East · power per module
Events
Strings · charge over the day
| MPPT | Side | Input | Ah | vs. sibling |
|---|
The two strings of an MPPT see the same voltage and the same sky, so their charge should match within a few percent. A string well below its sibling all day points to a defect (module, bypass diode, connector); only in the morning or evening points to shading.
A tracker counts as stuck when it runs clearly above the voltage of the best MPPT of the same side and clearly below its power, per module, for at least 15 minutes: on sunny days partial shading gives each string two power maxima and the inverter can stay on the worse one. Remedy: Shadow Scan on the inverter (SolarGo).