755 W TOPCon solar panel with 132 cells. Voc 50 V · Isc 18.99 A · TcVoc -0.26%/°C.
Select the panel you want to replace
Panel not in the catalogue?
14 of the 4,444 panels in the catalogue can replace TommaTech TT755-132TNB12 G2G. 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 100 % · 1 model
Small differences within tolerance — safe once verified in the calculator with your inverter.
Match 85–92 % · 6 models
Noticeable differences — the string voltage and current need a careful check.
Match 69–77 % · 6 models
Large differences — a real risk of a mismatched string; prefer a closer panel.
Match 50 % · 1 model
String Compatibility Calculator
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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
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Voc
50 V
Vmpp
41.9 V
Isc
18.99 A
Impp
18.02 A
TcVoc
-0.26 %/°C
TcPmax
-0.32 %/°C
Pmax
755 W
Cells
132
Length
2384 mm
Width
1303 mm
Thickness
35 mm
Weight
37.5 kg
The TommaTech TT755-132TNB12 G2G is a 755 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 |
|---|---|---|---|
| TT720-132TNB12 G2G | 720 W | 48.6 V | 18.67 A |
| TT725-132TNB12 G2G | 725 W | 48.8 V | 18.72 A |
| TT730-132TNB12 G2G | 730 W | 49 V | 18.76 A |
| TT735-132TNB12 G2G | 735 W | 49.2 V | 18.8 A |
| TT740-132TNB12 G2G | 740 W | 49.4 V | 18.85 A |
| TT745-132TNB12 G2G | 745 W | 49.6 V | 18.89 A |
| TT750-132TNB12 G2G | 750 W | 49.8 V | 18.95 A |
The most critical specs to match are: cell count (must be exactly 132), Voc close to 50 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 TommaTech TT755-132TNB12 G2G.