435 W TOPCon solar panel with 144 cells. Voc 51.8 V · Isc 10.64 A · TcVoc -0.24%/°C.
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Panel not in the catalogue?
31 of the 4,444 panels in the catalogue can replace Trina Solar TSM-NEG9R.28-435. 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 85–86 % · 3 models
Noticeable differences — the string voltage and current need a careful check.
Match 62–78 % · 14 models
Large differences — a real risk of a mismatched string; prefer a closer panel.
Match 3–57 % · 14 models
String Compatibility Calculator
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Voc
51.8 V
Vmpp
43.6 V
Isc
10.64 A
Impp
9.99 A
TcVoc
-0.24 %/°C
TcPmax
-0.29 %/°C
Pmax
435 W
Cells
144
Length
1762 mm
Width
1134 mm
Thickness
30 mm
Weight
21 kg
The Trina Solar TSM-NEG9R.28-435 is a 435 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 |
|---|---|---|---|
| TSM-NEG9R.28-425 | 425 W | 50.9 V | 10.56 A |
| TSM-NEG9R.28-430 | 430 W | 51.4 V | 10.59 A |
| TSM-NEG9R.28-440 | 440 W | 52.2 V | 10.67 A |
| TSM-NEG9R.28-445 | 445 W | 52.6 V | 10.71 A |
| TSM-NEG9R.28-450 | 450 W | 52.9 V | 10.74 A |
| TSM-NEG9R.28-455 | 455 W | 53.4 V | 10.77 A |
| TSM-NEG9R.28-460 | 460 W | 53.8 V | 10.81 A |
| TSM-NEG9R.28-465 | 465 W | 54.2 V | 10.85 A |
| TSM-NEG9R.28-470 | 470 W | 54.6 V | 10.89 A |
| TSM-NEG9R.28-475 | 475 W | 55 V | 10.93 A |
The most critical specs to match are: cell count (must be exactly 144), Voc close to 51.8 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 Trina Solar TSM-NEG9R.28-435.