420 W PERC solar panel with 320 cells. Voc 43.3 V · Isc 12.46 A · TcVoc -0.27%/°C.
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4 panels found · 3696 panels excluded
425 W
PERC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 43.3 V | 43.4 V | 0.2% |
| Vmpp | 35.9 V | 36 V | 0.3% |
| Isc | 12.46 A | 12.56 A | 0.8% |
| Impp | 11.71 A | 11.81 A | 0.9% |
| TcVoc | -0.27 %/°C | -0.27 %/°C | ±0.000 %/°C |
| TcPmax | -0.34 %/°C | -0.34 %/°C | ±0.000 %/°C |
430 W
PERC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 43.3 V | 43.5 V | 0.5% |
| Vmpp | 35.9 V | 36.1 V | 0.6% |
| Isc | 12.46 A | 12.68 A | 1.8% |
| Impp | 11.71 A | 11.92 A | 1.8% |
| TcVoc | -0.27 %/°C | -0.27 %/°C | ±0.000 %/°C |
| TcPmax | -0.34 %/°C | -0.34 %/°C | ±0.000 %/°C |
435 W
PERC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 43.3 V | 43.6 V | 0.7% |
| Vmpp | 35.9 V | 36.2 V | 0.8% |
| Isc | 12.46 A | 12.79 A | 2.6% |
| Impp | 11.71 A | 12.02 A | 2.6% |
| TcVoc | -0.27 %/°C | -0.27 %/°C | ±0.000 %/°C |
| TcPmax | -0.34 %/°C | -0.34 %/°C | ±0.000 %/°C |
440 W
PERC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 43.3 V | 43.7 V | 0.9% |
| Vmpp | 35.9 V | 36.3 V | 1.1% |
| Isc | 12.46 A | 12.9 A | 3.5% |
| Impp | 11.71 A | 12.13 A | 3.6% |
| TcVoc | -0.27 %/°C | -0.27 %/°C | ±0.000 %/°C |
| TcPmax | -0.34 %/°C | -0.34 %/°C | ±0.000 %/°C |
String Compatibility Calculator
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Voc
43.3 V
Vmpp
35.9 V
Isc
12.46 A
Impp
11.71 A
TcVoc
-0.27 %/°C
TcPmax
-0.34 %/°C
Pmax
420 W
Cells
320
Length
1899 mm
Width
1096 mm
Thickness
30 mm
Weight
21.8 kg
The RECOM RCM-420-SMD1 is a 420 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 |
|---|---|---|---|
| 425 W | 43.4 V | 12.56 A | |
| 430 W | 43.5 V | 12.68 A | |
| 435 W | 43.6 V | 12.79 A | |
| 440 W | 43.7 V | 12.9 A | |
| 445 W | 43.8 V | 13.01 A |
The most critical specs to match are: cell count (must be exactly 320), Voc close to 43.3 V (within ±5%), and temperature coefficient TcVoc close to -0.27%/°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 RECOM RCM-420-SMD1.