Find replacement for TommaTech TT745-132TNB12 G2G

745 W TOPCon solar panel with 132 cells. Voc 49.6 V · Isc 18.89 A · TcVoc -0.26%/°C.

Original Panel

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Same technology onlyShow only panels with matching cell technology

Compatible Replacements

19 panels found · 3411 panels excluded

TommaTech TT745-132TNB12

745 W

TOPCon

100Exact match

Parameter	Original	Replacement	Deviation
Voc	49.6 V	49.6 V	0.0%
Vmpp	41.5 V	41.5 V	0.0%
Isc	18.89 A	18.89 A	0.0%
Impp	17.96 A	17.96 A	0.0%
TcVoc	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C
TcPmax	-0.32 %/°C	-0.32 %/°C	±0.000 %/°C

TommaTech TT745-132TNB12 Diamond Plus G2G

745 W

TOPCon

100Exact match

Parameter	Original	Replacement	Deviation
Voc	49.6 V	49.6 V	0.0%
Vmpp	41.5 V	41.5 V	0.0%
Isc	18.89 A	18.89 A	0.0%
Impp	17.96 A	17.96 A	0.0%
TcVoc	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C
TcPmax	-0.32 %/°C	-0.32 %/°C	±0.000 %/°C

TommaTech TT740-132TNB12

740 W

TOPCon

92Good match

Parameter	Original	Replacement	Deviation
Voc	49.6 V	49.4 V	0.4%
Vmpp	41.5 V	41.3 V	0.5%
Isc	18.89 A	18.85 A	0.2%
Impp	17.96 A	17.92 A	0.2%
TcVoc	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C
TcPmax	-0.32 %/°C	-0.32 %/°C	±0.000 %/°C

TommaTech TT750-132TNB12

750 W

TOPCon

92Good match

Parameter	Original	Replacement	Deviation
Voc	49.6 V	49.8 V	0.4%
Vmpp	41.5 V	41.7 V	0.5%
Isc	18.89 A	18.95 A	0.3%
Impp	17.96 A	17.99 A	0.2%
TcVoc	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C
TcPmax	-0.32 %/°C	-0.32 %/°C	±0.000 %/°C

TommaTech TT740-132TNB12 G2G

740 W

TOPCon

92Good match

Parameter	Original	Replacement	Deviation
Voc	49.6 V	49.4 V	0.4%
Vmpp	41.5 V	41.3 V	0.5%
Isc	18.89 A	18.85 A	0.2%
Impp	17.96 A	17.92 A	0.2%
TcVoc	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C
TcPmax	-0.32 %/°C	-0.32 %/°C	±0.000 %/°C

TommaTech TT750-132TNB12 G2G

750 W

TOPCon

92Good match

Parameter	Original	Replacement	Deviation
Voc	49.6 V	49.8 V	0.4%
Vmpp	41.5 V	41.7 V	0.5%
Isc	18.89 A	18.95 A	0.3%
Impp	17.96 A	17.99 A	0.2%
TcVoc	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C
TcPmax	-0.32 %/°C	-0.32 %/°C	±0.000 %/°C

TommaTech TT740-132TNB12 Diamond Plus G2G

740 W

TOPCon

92Good match

Parameter	Original	Replacement	Deviation
Voc	49.6 V	49.4 V	0.4%
Vmpp	41.5 V	41.3 V	0.5%
Isc	18.89 A	18.85 A	0.2%
Impp	17.96 A	17.92 A	0.2%
TcVoc	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C
TcPmax	-0.32 %/°C	-0.32 %/°C	±0.000 %/°C

TommaTech TT750-132TNB12 Diamond Plus G2G

750 W

TOPCon

92Good match

Parameter	Original	Replacement	Deviation
Voc	49.6 V	49.8 V	0.4%
Vmpp	41.5 V	41.7 V	0.5%
Isc	18.89 A	18.95 A	0.3%
Impp	17.96 A	17.99 A	0.2%
TcVoc	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C
TcPmax	-0.32 %/°C	-0.32 %/°C	±0.000 %/°C

TommaTech TT735-132TNB12

735 W

TOPCon

85Good match

Parameter	Original	Replacement	Deviation
Voc	49.6 V	49.2 V	0.8%
Vmpp	41.5 V	41.1 V	1.0%
Isc	18.89 A	18.8 A	0.5%
Impp	17.96 A	17.89 A	0.4%
TcVoc	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C
TcPmax	-0.32 %/°C	-0.32 %/°C	±0.000 %/°C

TommaTech TT735-132TNB12 G2G

735 W

TOPCon

85Good match

Parameter	Original	Replacement	Deviation
Voc	49.6 V	49.2 V	0.8%
Vmpp	41.5 V	41.1 V	1.0%
Isc	18.89 A	18.8 A	0.5%
Impp	17.96 A	17.89 A	0.4%
TcVoc	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C
TcPmax	-0.32 %/°C	-0.32 %/°C	±0.000 %/°C

TommaTech TT735-132TNB12 Diamond Plus G2G

735 W

TOPCon

85Good match

Parameter	Original	Replacement	Deviation
Voc	49.6 V	49.2 V	0.8%
Vmpp	41.5 V	41.1 V	1.0%
Isc	18.89 A	18.8 A	0.5%
Impp	17.96 A	17.89 A	0.4%
TcVoc	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C
TcPmax	-0.32 %/°C	-0.32 %/°C	±0.000 %/°C

TommaTech TT755-132TNB12

755 W

TOPCon

84Good match

Parameter	Original	Replacement	Deviation
Voc	49.6 V	50 V	0.8%
Vmpp	41.5 V	41.9 V	1.0%
Isc	18.89 A	18.99 A	0.5%
Impp	17.96 A	18.02 A	0.3%
TcVoc	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C
TcPmax	-0.32 %/°C	-0.32 %/°C	±0.000 %/°C

String Compatibility Calculator

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Panel Matcher

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Original Panel Specs

Voc

49.6 V

Vmpp

41.5 V

Isc

18.89 A

Impp

17.96 A

TcVoc

-0.26 %/°C

TcPmax

-0.32 %/°C

Pmax

745 W

Cells

132

Length

2384 mm

Width

1303 mm

Thickness

35 mm

Weight

37.5 kg

The TommaTech TT745-132TNB12 G2G is a 745 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.

Other models in this series

Power	Voc	Isc
720 W	48.6 V	18.67 A
725 W	48.8 V	18.72 A
730 W	49 V	18.76 A
735 W	49.2 V	18.8 A
740 W	49.4 V	18.85 A
750 W	49.8 V	18.95 A
755 W	50 V	18.99 A

Frequently Asked Questions

What specs must match when replacing the TommaTech TT745-132TNB12 G2G?

The most critical specs to match are: cell count (must be exactly 132), Voc close to 49.6 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.

Can I use a higher wattage replacement for the TommaTech TT745-132TNB12 G2G?

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.

What happens if the replacement panel has different voltage specs?

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 TT745-132TNB12 G2G.