400 W PERC solar panel with 108 cells. Voc 37 V · Isc 13.86 A · TcVoc -0.28%/°C.
Select the panel you want to replace
Voc
37 V
Vmpp
30.56 V
Isc
13.86 A
Impp
13.09 A
TcVoc
-0.28 %/°C
TcPmax
-0.35 %/°C
Pmax
400 W
Cells
108
Bifaciality
70%
The Yingli Solar YL400DF54 e/2 is a 400 W solar panel. Finding a compatible replacement requires matching the original electrical characteristics — particularly Voc, Vmpp, Isc, and temperature coefficients — to ensure safe operation within the same string.
Use the form above to find panels that match these specifications. Then verify the replacement in the String Compatibility Calculator with your inverter.
| Model | Power | Voc | Isc |
|---|---|---|---|
| 390 W | 36.8 V | 13.68 A | |
| 395 W | 36.9 V | 13.77 A | |
| 405 W | 37.1 V | 13.95 A | |
| 410 W | 37.2 V | 14.04 A | |
| 415 W | 37.3 V | 14.13 A |
The most critical specs to match are: cell count (must be exactly 108), Voc close to 37 V (within ±5%), and temperature coefficient TcVoc close to -0.28%/°C. If Voc differs significantly, the string voltage at extreme temperatures may shift outside the inverter's MPPT range. The replacement finder above pre-screens all candidates by these criteria.
A higher wattage panel usually has a higher Vmpp or Isc, which can affect string voltage and current. Small increases (up to 10–15%) are typically safe if the other electrical specs align. The replacement finder shows a compatibility score — 'Exact match' means the specs align closely. Always verify the replacement in the String Compatibility Calculator with your inverter before installation.
If the replacement has a significantly different Voc or Vmpp, the string voltage may shift outside the inverter's MPPT range, reducing energy production or causing faults. This effect is amplified at temperature extremes: at low temperatures, voltage rises by the TcVoc coefficient. The replacement finder automatically accounts for this — it scores candidates by how closely the electrical specs match the original Yingli Solar YL400DF54 e/2.