635 W TOPCon solar panel with 144 cells. Voc 48.05 V · Isc 16.59 A · TcVoc -0.23%/°C.
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4 panels found · 4335 panels excluded
640 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 48.05 V | 48.08 V | 0.1% |
| Vmpp | 40.76 V | 40.79 V | 0.1% |
| Isc | 16.59 A | 16.71 A | 0.7% |
| Impp | 15.58 A | 15.69 A | 0.7% |
| TcVoc | -0.23 %/°C | -0.23 %/°C | ±0.000 %/°C |
| TcPmax | -0.28 %/°C | -0.28 %/°C | ±0.000 %/°C |
630 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 48.05 V | 47.98 V | 0.1% |
| Vmpp | 40.76 V | 40.7 V | 0.1% |
| Isc | 16.59 A | 16.49 A | 0.6% |
| Impp | 15.58 A | 15.48 A | 0.6% |
| TcVoc | -0.23 %/°C | -0.23 %/°C | ±0.000 %/°C |
| TcPmax | -0.28 %/°C | -0.28 %/°C | ±0.000 %/°C |
645 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 48.05 V | 48.16 V | 0.2% |
| Vmpp | 40.76 V | 40.85 V | 0.2% |
| Isc | 16.59 A | 16.81 A | 1.3% |
| Impp | 15.58 A | 15.79 A | 1.3% |
| TcVoc | -0.23 %/°C | -0.23 %/°C | ±0.000 %/°C |
| TcPmax | -0.28 %/°C | -0.28 %/°C | ±0.000 %/°C |
650 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 48.05 V | 48.2 V | 0.3% |
| Vmpp | 40.76 V | 40.89 V | 0.3% |
| Isc | 16.59 A | 16.93 A | 2.0% |
| Impp | 15.58 A | 15.9 A | 2.1% |
| TcVoc | -0.23 %/°C | -0.23 %/°C | ±0.000 %/°C |
| TcPmax | -0.28 %/°C | -0.28 %/°C | ±0.000 %/°C |
String Compatibility Calculator
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How the Algorithm Works
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Voc
48.05 V
Vmpp
40.76 V
Isc
16.59 A
Impp
15.58 A
TcVoc
-0.23 %/°C
TcPmax
-0.28 %/°C
Pmax
635 W
Cells
144
Bifaciality
80%
Length
2465 mm
Width
1134 mm
Thickness
30 mm
Weight
34.5 kg
The Horay Solar HS635TC-MHD-D is a 635 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 |
|---|---|---|---|
| HS630TC-MHD-D | 630 W | 47.98 V | 16.49 A |
| HS640TC-MHD-D | 640 W | 48.08 V | 16.71 A |
| HS645TC-MHD-D | 645 W | 48.16 V | 16.81 A |
| HS650TC-MHD-D | 650 W | 48.2 V | 16.93 A |
The most critical specs to match are: cell count (must be exactly 144), Voc close to 48.05 V (within ±5%), and temperature coefficient TcVoc close to -0.23%/°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 Horay Solar HS635TC-MHD-D.