640 W TOPCon solar panel with 132 cells. Voc 50.35 V · Isc 16.15 A · TcVoc -0.26%/°C.
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144 panels found · 3566 panels excluded
635 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 50.35 V | 50.11 V | 0.5% |
| Vmpp | 41.84 V | 41.65 V | 0.5% |
| Isc | 16.15 A | 16.1 A | 0.3% |
| Impp | 15.3 A | 15.25 A | 0.3% |
| TcVoc | -0.26 %/°C | -0.26 %/°C | ±0.000 %/°C |
| TcPmax | -0.31 %/°C | -0.31 %/°C | ±0.000 %/°C |
650 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 50.35 V | 50.3 V | 0.1% |
| Vmpp | 41.84 V | 41.8 V | 0.1% |
| Isc | 16.15 A | 16.43 A | 1.7% |
| Impp | 15.3 A | 15.55 A | 1.6% |
| TcVoc | -0.26 %/°C | -0.25 %/°C | ±0.010 %/°C |
| TcPmax | -0.31 %/°C | -0.29 %/°C | ±0.020 %/°C |
630 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 50.35 V | 49.87 V | 1.0% |
| Vmpp | 41.84 V | 41.45 V | 0.9% |
| Isc | 16.15 A | 16.05 A | 0.6% |
| Impp | 15.3 A | 15.2 A | 0.7% |
| TcVoc | -0.26 %/°C | -0.26 %/°C | ±0.000 %/°C |
| TcPmax | -0.31 %/°C | -0.31 %/°C | ±0.000 %/°C |
650 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 50.35 V | 50.28 V | 0.1% |
| Vmpp | 41.84 V | 41.58 V | 0.6% |
| Isc | 16.15 A | 16.44 A | 1.8% |
| Impp | 15.3 A | 15.64 A | 2.2% |
| TcVoc | -0.26 %/°C | -0.25 %/°C | ±0.010 %/°C |
| TcPmax | -0.31 %/°C | -0.29 %/°C | ±0.020 %/°C |
650 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 50.35 V | 50.28 V | 0.1% |
| Vmpp | 41.84 V | 41.57 V | 0.6% |
| Isc | 16.15 A | 16.44 A | 1.8% |
| Impp | 15.3 A | 15.64 A | 2.2% |
| TcVoc | -0.26 %/°C | -0.25 %/°C | ±0.010 %/°C |
| TcPmax | -0.31 %/°C | -0.29 %/°C | ±0.020 %/°C |
650 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 50.35 V | 50.28 V | 0.1% |
| Vmpp | 41.84 V | 41.57 V | 0.6% |
| Isc | 16.15 A | 16.44 A | 1.8% |
| Impp | 15.3 A | 15.64 A | 2.2% |
| TcVoc | -0.26 %/°C | -0.25 %/°C | ±0.010 %/°C |
| TcPmax | -0.31 %/°C | -0.29 %/°C | ±0.020 %/°C |
655 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 50.35 V | 50.47 V | 0.2% |
| Vmpp | 41.84 V | 41.7 V | 0.3% |
| Isc | 16.15 A | 16.5 A | 2.2% |
| Impp | 15.3 A | 15.71 A | 2.7% |
| TcVoc | -0.26 %/°C | -0.25 %/°C | ±0.010 %/°C |
| TcPmax | -0.31 %/°C | -0.29 %/°C | ±0.020 %/°C |
655 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 50.35 V | 50.47 V | 0.2% |
| Vmpp | 41.84 V | 41.7 V | 0.3% |
| Isc | 16.15 A | 16.5 A | 2.2% |
| Impp | 15.3 A | 15.71 A | 2.7% |
| TcVoc | -0.26 %/°C | -0.25 %/°C | ±0.010 %/°C |
| TcPmax | -0.31 %/°C | -0.29 %/°C | ±0.020 %/°C |
630 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 50.35 V | 50.2 V | 0.3% |
| Vmpp | 41.84 V | 42 V | 0.4% |
| Isc | 16.15 A | 16.09 A | 0.4% |
| Impp | 15.3 A | 15 A | 2.0% |
| TcVoc | -0.26 %/°C | -0.24 %/°C | ±0.020 %/°C |
| TcPmax | -0.31 %/°C | -0.29 %/°C | ±0.020 %/°C |
640 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 50.35 V | 50.35 V | 0.0% |
| Vmpp | 41.84 V | 41.84 V | 0.0% |
| Isc | 16.15 A | 16.15 A | 0.0% |
| Impp | 15.3 A | 15.29 A | 0.1% |
| TcVoc | -0.26 %/°C | -0.23 %/°C | ±0.030 %/°C |
| TcPmax | -0.31 %/°C | -0.28 %/°C | ±0.030 %/°C |
645 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 50.35 V | 50.1 V | 0.5% |
| Vmpp | 41.84 V | 41.64 V | 0.5% |
| Isc | 16.15 A | 16.37 A | 1.4% |
| Impp | 15.3 A | 15.49 A | 1.2% |
| TcVoc | -0.26 %/°C | -0.25 %/°C | ±0.010 %/°C |
| TcPmax | -0.31 %/°C | -0.29 %/°C | ±0.020 %/°C |
630 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 50.35 V | 49.95 V | 0.8% |
| Vmpp | 41.84 V | 41.46 V | 0.9% |
| Isc | 16.15 A | 16.05 A | 0.6% |
| Impp | 15.3 A | 15.2 A | 0.7% |
| TcVoc | -0.26 %/°C | -0.25 %/°C | ±0.010 %/°C |
| TcPmax | -0.31 %/°C | -0.3 %/°C | ±0.010 %/°C |
String Compatibility Calculator
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Panel Matcher
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How the Algorithm Works
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Voc
50.35 V
Vmpp
41.84 V
Isc
16.15 A
Impp
15.3 A
TcVoc
-0.26 %/°C
TcPmax
-0.31 %/°C
Pmax
640 W
Cells
132
Bifaciality
80%
Length
2382 mm
Width
1134 mm
Thickness
30 mm
Weight
32.5 kg
The AXITEC AC-640TGB/132WS is a 640 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 |
|---|---|---|---|
| AC-625TGB/132TWS | 625 W | 49.63 V | 16 A |
| AC-630TGB/132WS | 630 W | 49.87 V | 16.05 A |
| AC-635TGB/132WS | 635 W | 50.11 V | 16.1 A |
The most critical specs to match are: cell count (must be exactly 132), Voc close to 50.35 V (within ±5%), and temperature coefficient TcVoc close to -0.26%/°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 AXITEC AC-640TGB/132WS.