640 W TOPCon solar panel with 132 cells. Voc 50.12 V · Isc 16.17 A · TcVoc -0.24%/°C.
Select the panel you want to replace
Panel not in the catalogue?
199 of the 4,444 panels in the catalogue can replace Greensun Solar GSM-MN12R/132HBD-640W. 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.
Small differences within tolerance — safe once verified in the calculator with your inverter.
Match 80–92 % · 29 models
Noticeable differences — the string voltage and current need a careful check.
Match 60–79 % · 96 models
Large differences — a real risk of a mismatched string; prefer a closer panel.
Match 34–59 % · 74 models
String Compatibility Calculator
Verify the replacement panel works with your inverter
Panel Matcher
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Find an inverter that fits your panel array with the right MPPT range and DC/AC ratio.
How the Algorithm Works
Learn how panels are scored and matched
Voc
50.12 V
Vmpp
41.91 V
Isc
16.17 A
Impp
15.29 A
TcVoc
-0.24 %/°C
TcPmax
-0.3 %/°C
Pmax
640 W
Cells
132
Bifaciality
80%
Length
2382 mm
Width
1134 mm
Thickness
30 mm
Weight
33.7 kg
The Greensun Solar GSM-MN12R/132HBD-640W 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 |
|---|---|---|---|
| GSM-MN12R/132HBD-625W | 625 W | 49.52 V | 16.02 A |
| GSM-MN12R/132HBD-630W | 630 W | 49.72 V | 16.07 A |
| GSM-MN12R/132HBD-635W | 635 W | 49.92 V | 16.12 A |
| GSM-MN12R/132HBD-645W | 645 W | 50.32 V | 16.22 A |
| GSM-MN12R/132HBD-650W | 650 W | 50.52 V | 16.27 A |
The most critical specs to match are: cell count (must be exactly 132), Voc close to 50.12 V (within ±5%), and temperature coefficient TcVoc close to -0.24%/°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 Greensun Solar GSM-MN12R/132HBD-640W.