320 W PERC solar panel with 60 cells. Voc 40.22 V · Isc 10.2 A · TcVoc -0.28%/°C.
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325 W
PERC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 40.22 V | 40.41 V | 0.5% |
| Vmpp | 33.61 V | 33.85 V | 0.7% |
| Isc | 10.2 A | 10.31 A | 1.1% |
| Impp | 9.52 A | 9.6 A | 0.8% |
| TcVoc | -0.28 %/°C | -0.28 %/°C | ±0.000 %/°C |
| TcPmax | -0.39 %/°C | -0.39 %/°C | ±0.000 %/°C |
330 W
PERC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 40.22 V | 40.6 V | 0.9% |
| Vmpp | 33.61 V | 34.09 V | 1.4% |
| Isc | 10.2 A | 10.42 A | 2.2% |
| Impp | 9.52 A | 9.68 A | 1.7% |
| TcVoc | -0.28 %/°C | -0.28 %/°C | ±0.000 %/°C |
| TcPmax | -0.39 %/°C | -0.39 %/°C | ±0.000 %/°C |
300 W
PERC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 40.22 V | 40.16 V | 0.1% |
| Vmpp | 33.61 V | 32.6 V | 3.0% |
| Isc | 10.2 A | 9.59 A | 6.0% |
| Impp | 9.52 A | 9.21 A | 3.3% |
| TcVoc | -0.28 %/°C | -0.273 %/°C | ±0.007 %/°C |
| TcPmax | -0.39 %/°C | -0.389 %/°C | ±0.001 %/°C |
305 W
PERC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 40.22 V | 39.9 V | 0.8% |
| Vmpp | 33.61 V | 33.2 V | 1.2% |
| Isc | 10.2 A | 9.64 A | 5.5% |
| Impp | 9.52 A | 9.2 A | 3.4% |
| TcVoc | -0.28 %/°C | -0.273 %/°C | ±0.007 %/°C |
| TcPmax | -0.39 %/°C | -0.389 %/°C | ±0.001 %/°C |
310 W
PERC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 40.22 V | 39.36 V | 2.1% |
| Vmpp | 33.61 V | 31.83 V | 5.3% |
| Isc | 10.2 A | 10.29 A | 0.9% |
| Impp | 9.52 A | 9.74 A | 2.3% |
| TcVoc | -0.28 %/°C | -0.273 %/°C | ±0.007 %/°C |
| TcPmax | -0.39 %/°C | -0.389 %/°C | ±0.001 %/°C |
305 W
PERC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 40.22 V | 39.49 V | 1.8% |
| Vmpp | 33.61 V | 32.35 V | 3.7% |
| Isc | 10.2 A | 9.86 A | 3.3% |
| Impp | 9.52 A | 9.43 A | 0.9% |
| TcVoc | -0.28 %/°C | -0.318 %/°C | ±0.038 %/°C |
| TcPmax | -0.39 %/°C | -0.427 %/°C | ±0.037 %/°C |
300 W
PERC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 40.22 V | 39.39 V | 2.1% |
| Vmpp | 33.61 V | 32.09 V | 4.5% |
| Isc | 10.2 A | 9.78 A | 4.1% |
| Impp | 9.52 A | 9.35 A | 1.8% |
| TcVoc | -0.28 %/°C | -0.318 %/°C | ±0.038 %/°C |
| TcPmax | -0.39 %/°C | -0.427 %/°C | ±0.037 %/°C |
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Voc
40.22 V
Vmpp
33.61 V
Isc
10.2 A
Impp
9.52 A
TcVoc
-0.28 %/°C
TcPmax
-0.39 %/°C
Pmax
320 W
Cells
60
Length
1700 mm
Width
1000 mm
Thickness
35 mm
Weight
19 kg
The Sonnenstromfabrik EXCELLENT 320 M60 is a 320 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 |
|---|---|---|---|
| EXCELLENT 325 M60 | 325 W | 40.41 V | 10.31 A |
| EXCELLENT 330 M60 | 330 W | 40.6 V | 10.42 A |
The most critical specs to match are: cell count (must be exactly 60), Voc close to 40.22 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 Sonnenstromfabrik EXCELLENT 320 M60.