640 W IBC solar panel with 72 cells. Voc 53.8 V · Isc 14.94 A · TcVoc -0.22%/°C.
Select the panel you want to replace
Panel not in the catalogue?
5 of the 4,444 panels in the catalogue can replace TCL Zhonghuan HSM-BD72-GC640. Before you buy, check your pick in the string calculator with your inverter.
CloseNoticeableLarge differenceTap or click a difference to see what it means for your string.
Near-identical electrics — a drop-in swap for the same string.
Match 96 % · 2 models
Small differences within tolerance — safe once verified in the calculator with your inverter.
Match 82–91 % · 3 models
String Compatibility Calculator
Verify the replacement panel works with your inverter
Panel Matcher
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How the Algorithm Works
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Voc
53.8 V
Vmpp
45.1 V
Isc
14.94 A
Impp
14.2 A
TcVoc
-0.22 %/°C
TcPmax
-0.26 %/°C
Pmax
640 W
Cells
72
Bifaciality
75%
Length
2382 mm
Width
1134 mm
Thickness
30 mm
Weight
32.3 kg
The TCL Zhonghuan HSM-BD72-GC640 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 |
|---|---|---|---|
| HSM-BD72-GC635 | 635 W | 53.7 V | 14.88 A |
| HSM-BD72-GC645 | 645 W | 53.9 V | 15 A |
| HSM-BD72-GC650 | 650 W | 54 V | 15.06 A |
| HSM-BD72-GC655 | 655 W | 54.1 V | 15.12 A |
| HSM-BD72-GC660 | 660 W | 54.2 V | 15.18 A |
The most critical specs to match are: cell count (must be exactly 72), Voc close to 53.8 V (within ±5%), and temperature coefficient TcVoc close to -0.22%/°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 TCL Zhonghuan HSM-BD72-GC640.