525 W TOPCon solar panel with 108 cells. Voc 40.55 V · Isc 16.13 A · TcVoc -0.25%/°C.
Select the panel you want to replace
Panel not in the catalogue?
54 of the 4,444 panels in the catalogue can replace TommaTech TT525-108TNB12R. 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 81–92 % · 12 models
Noticeable differences — the string voltage and current need a careful check.
Match 61–79 % · 29 models
Large differences — a real risk of a mismatched string; prefer a closer panel.
Match 36–58 % · 13 models
String Compatibility Calculator
Verify the replacement panel works with your inverter
Panel Matcher
Find all compatible panels for a specific inverter
Already have panels?
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
40.55 V
Vmpp
34.35 V
Isc
16.13 A
Impp
15.29 A
TcVoc
-0.25 %/°C
TcPmax
-0.29 %/°C
Pmax
525 W
Cells
108
Length
1965 mm
Width
1134 mm
Thickness
30 mm
Weight
27.8 kg
The TommaTech TT525-108TNB12R is a 525 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 |
|---|---|---|---|
| TT510-108TNB12R | 510 W | 39.95 V | 15.95 A |
| TT515-108TNB12R | 515 W | 40.15 V | 16.01 A |
| TT520-108TNB12R | 520 W | 40.35 V | 16.07 A |
| TT530-108TNB12R | 530 W | 40.75 V | 16.19 A |
| TT535-108TNB12R | 535 W | 40.95 V | 16.25 A |
The most critical specs to match are: cell count (must be exactly 108), Voc close to 40.55 V (within ±5%), and temperature coefficient TcVoc close to -0.25%/°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 TT525-108TNB12R.