Find replacement for Trina Solar TSM-NEG18R.20-520

520 W TOPCon solar panel with 108 cells. Voc 41.2 V · Isc 15.99 A · TcVoc -0.24%/°C.

Original Panel

Select the panel you want to replace

Same technology onlyShow only panels with matching cell technology

Compatible Replacements

71 panels found · 4268 panels excluded

Trina Solar TSM-NEG18R.28-520

520 W

TOPCon

100Exact match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	41.2 V	0.0%
Vmpp	34.1 V	34.1 V	0.0%
Isc	15.99 A	15.99 A	0.0%
Impp	15.25 A	15.25 A	0.0%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEL18R-520

520 W

TOPCon

100Exact match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	41.2 V	0.0%
Vmpp	34.1 V	34.1 V	0.0%
Isc	15.99 A	15.99 A	0.0%
Impp	15.25 A	15.25 A	0.0%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEG18R.25-520

520 W

TOPCon

100Exact match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	41.2 V	0.0%
Vmpp	34.1 V	34.1 V	0.0%
Isc	15.99 A	15.99 A	0.0%
Impp	15.25 A	15.25 A	0.0%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEG18R.25-515

515 W

TOPCon

88Good match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	40.9 V	0.7%
Vmpp	34.1 V	33.9 V	0.6%
Isc	15.99 A	15.96 A	0.2%
Impp	15.25 A	15.2 A	0.3%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEL18R-515

515 W

TOPCon

88Good match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	40.9 V	0.7%
Vmpp	34.1 V	33.9 V	0.6%
Isc	15.99 A	15.96 A	0.2%
Impp	15.25 A	15.2 A	0.3%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEG18R.20-515

515 W

TOPCon

88Good match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	40.9 V	0.7%
Vmpp	34.1 V	33.9 V	0.6%
Isc	15.99 A	15.96 A	0.2%
Impp	15.25 A	15.2 A	0.3%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEG18R.28-515

515 W

TOPCon

88Good match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	40.9 V	0.7%
Vmpp	34.1 V	33.9 V	0.6%
Isc	15.99 A	15.96 A	0.2%
Impp	15.25 A	15.2 A	0.3%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEG18R.20-525

525 W

TOPCon

85Good match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	41.6 V	1.0%
Vmpp	34.1 V	34.3 V	0.6%
Isc	15.99 A	16.02 A	0.2%
Impp	15.25 A	15.31 A	0.4%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEG18R.28-525

525 W

TOPCon

85Good match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	41.6 V	1.0%
Vmpp	34.1 V	34.3 V	0.6%
Isc	15.99 A	16.02 A	0.2%
Impp	15.25 A	15.31 A	0.4%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Sun Earth DXM10-54H 525W

525 W

TOPCon

79Acceptable

Parameter	Original	Replacement	Deviation
Voc	41.2 V	41.16 V	0.1%
Vmpp	34.1 V	35 V	2.6%
Isc	15.99 A	15.85 A	0.9%
Impp	15.25 A	15 A	1.6%
TcVoc	-0.24 %/°C	-0.23 %/°C	±0.010 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Sun Earth DXM10-54H 520W

520 W

TOPCon

76Acceptable

Parameter	Original	Replacement	Deviation
Voc	41.2 V	40.99 V	0.5%
Vmpp	34.1 V	34.8 V	2.1%
Isc	15.99 A	15.8 A	1.2%
Impp	15.25 A	14.95 A	2.0%
TcVoc	-0.24 %/°C	-0.23 %/°C	±0.010 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEL18R-510

510 W

TOPCon

75Acceptable

Parameter	Original	Replacement	Deviation
Voc	41.2 V	40.6 V	1.5%
Vmpp	34.1 V	33.7 V	1.2%
Isc	15.99 A	15.93 A	0.4%
Impp	15.25 A	15.14 A	0.7%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

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

Original Panel Specs

Voc

41.2 V

Vmpp

34.1 V

Isc

15.99 A

Impp

15.25 A

TcVoc

-0.24 %/°C

TcPmax

-0.29 %/°C

Pmax

520 W

Cells

108

Length

1961 mm

Width

1134 mm

Thickness

30 mm

Weight

23.5 kg

The Trina Solar TSM-NEG18R.20-520 is a 520 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

Model	Power	Voc	Isc
TSM-NEG18R.20-495	495 W	39.8 V	15.83 A
TSM-NEG18R.20-500	500 W	40.1 V	15.86 A
TSM-NEG18R.20-505	505 W	40.3 V	15.89 A
TSM-NEG18R.20-510	510 W	40.6 V	15.93 A
TSM-NEG18R.20-515	515 W	40.9 V	15.96 A
TSM-NEG18R.20-525	525 W	41.6 V	16.02 A

Frequently Asked Questions

What specs must match when replacing the Trina Solar TSM-NEG18R.20-520?

The most critical specs to match are: cell count (must be exactly 108), Voc close to 41.2 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.

Can I use a higher wattage replacement for the Trina Solar TSM-NEG18R.20-520?

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 Trina Solar TSM-NEG18R.20-520.

All replacements

Find replacement for Trina Solar TSM-NEG18R.20-520

520 W TOPCon solar panel with 108 cells. Voc 41.2 V · Isc 15.99 A · TcVoc -0.24%/°C.

Original Panel

Select the panel you want to replace

Same technology onlyShow only panels with matching cell technology

Compatible Replacements

71 panels found · 4268 panels excluded

Trina Solar TSM-NEG18R.28-520

520 W

TOPCon

100Exact match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	41.2 V	0.0%
Vmpp	34.1 V	34.1 V	0.0%
Isc	15.99 A	15.99 A	0.0%
Impp	15.25 A	15.25 A	0.0%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEL18R-520

520 W

TOPCon

100Exact match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	41.2 V	0.0%
Vmpp	34.1 V	34.1 V	0.0%
Isc	15.99 A	15.99 A	0.0%
Impp	15.25 A	15.25 A	0.0%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEG18R.25-520

520 W

TOPCon

100Exact match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	41.2 V	0.0%
Vmpp	34.1 V	34.1 V	0.0%
Isc	15.99 A	15.99 A	0.0%
Impp	15.25 A	15.25 A	0.0%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEG18R.25-515

515 W

TOPCon

88Good match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	40.9 V	0.7%
Vmpp	34.1 V	33.9 V	0.6%
Isc	15.99 A	15.96 A	0.2%
Impp	15.25 A	15.2 A	0.3%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEL18R-515

515 W

TOPCon

88Good match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	40.9 V	0.7%
Vmpp	34.1 V	33.9 V	0.6%
Isc	15.99 A	15.96 A	0.2%
Impp	15.25 A	15.2 A	0.3%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEG18R.20-515

515 W

TOPCon

88Good match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	40.9 V	0.7%
Vmpp	34.1 V	33.9 V	0.6%
Isc	15.99 A	15.96 A	0.2%
Impp	15.25 A	15.2 A	0.3%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEG18R.28-515

515 W

TOPCon

88Good match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	40.9 V	0.7%
Vmpp	34.1 V	33.9 V	0.6%
Isc	15.99 A	15.96 A	0.2%
Impp	15.25 A	15.2 A	0.3%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEG18R.20-525

525 W

TOPCon

85Good match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	41.6 V	1.0%
Vmpp	34.1 V	34.3 V	0.6%
Isc	15.99 A	16.02 A	0.2%
Impp	15.25 A	15.31 A	0.4%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEG18R.28-525

525 W

TOPCon

85Good match

Parameter	Original	Replacement	Deviation
Voc	41.2 V	41.6 V	1.0%
Vmpp	34.1 V	34.3 V	0.6%
Isc	15.99 A	16.02 A	0.2%
Impp	15.25 A	15.31 A	0.4%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Sun Earth DXM10-54H 525W

525 W

TOPCon

79Acceptable

Parameter	Original	Replacement	Deviation
Voc	41.2 V	41.16 V	0.1%
Vmpp	34.1 V	35 V	2.6%
Isc	15.99 A	15.85 A	0.9%
Impp	15.25 A	15 A	1.6%
TcVoc	-0.24 %/°C	-0.23 %/°C	±0.010 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Sun Earth DXM10-54H 520W

520 W

TOPCon

76Acceptable

Parameter	Original	Replacement	Deviation
Voc	41.2 V	40.99 V	0.5%
Vmpp	34.1 V	34.8 V	2.1%
Isc	15.99 A	15.8 A	1.2%
Impp	15.25 A	14.95 A	2.0%
TcVoc	-0.24 %/°C	-0.23 %/°C	±0.010 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Trina Solar TSM-NEL18R-510

510 W

TOPCon

75Acceptable

Parameter	Original	Replacement	Deviation
Voc	41.2 V	40.6 V	1.5%
Vmpp	34.1 V	33.7 V	1.2%
Isc	15.99 A	15.93 A	0.4%
Impp	15.25 A	15.14 A	0.7%
TcVoc	-0.24 %/°C	-0.24 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

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

Original Panel Specs

Voc

41.2 V

Vmpp

34.1 V

Isc

15.99 A

Impp

15.25 A

TcVoc

-0.24 %/°C

TcPmax

-0.29 %/°C

Pmax

520 W

Cells

108

Length

1961 mm

Width

1134 mm

Thickness

30 mm

Weight

23.5 kg

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

Model	Power	Voc	Isc
TSM-NEG18R.20-495	495 W	39.8 V	15.83 A
TSM-NEG18R.20-500	500 W	40.1 V	15.86 A
TSM-NEG18R.20-505	505 W	40.3 V	15.89 A
TSM-NEG18R.20-510	510 W	40.6 V	15.93 A
TSM-NEG18R.20-515	515 W	40.9 V	15.96 A
TSM-NEG18R.20-525	525 W	41.6 V	16.02 A