Find replacement for Trina Solar TSM-DE09R.08-420

420 W PERC solar panel with 144 cells. Voc 50.1 V · Isc 10.58 A · TcVoc -0.25%/°C.

Original Panel

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Same technology onlyShow only panels with matching cell technology

Compatible Replacements

12 panels found · 3688 panels excluded

Trina Solar TSM-DE09R.08-425

425 W

PERC

94Good match

Parameter	Original	Replacement	Deviation
Voc	50.1 V	50.2 V	0.2%
Vmpp	42 V	42.2 V	0.5%
Isc	10.58 A	10.61 A	0.3%
Impp	10.01 A	10.08 A	0.7%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Trina Solar TSM-DE09R.08-415

415 W

PERC

93Good match

Parameter	Original	Replacement	Deviation
Voc	50.1 V	50 V	0.2%
Vmpp	42 V	41.7 V	0.7%
Isc	10.58 A	10.55 A	0.3%
Impp	10.01 A	9.94 A	0.7%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Trina Solar TSM-DE09R.08-430

430 W

PERC

90Good match

Parameter	Original	Replacement	Deviation
Voc	50.1 V	50.3 V	0.4%
Vmpp	42 V	42.3 V	0.7%
Isc	10.58 A	10.64 A	0.6%
Impp	10.01 A	10.17 A	1.6%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Trina Solar TSM-DE09R.08-435

435 W

PERC

84Good match

Parameter	Original	Replacement	Deviation
Voc	50.1 V	50.4 V	0.6%
Vmpp	42 V	42.5 V	1.2%
Isc	10.58 A	10.67 A	0.9%
Impp	10.01 A	10.24 A	2.3%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Trina Solar TSM-NEG9R.28-425

425 W

TOPCon

53Marginal

Parameter	Original	Replacement	Deviation
Voc	50.1 V	50.9 V	1.6%
Vmpp	42 V	42.9 V	2.1%
Isc	10.58 A	10.56 A	0.2%
Impp	10.01 A	9.92 A	0.9%
TcVoc	-0.25 %/°C	-0.24 %/°C	±0.010 %/°C
TcPmax	-0.34 %/°C	-0.29 %/°C	±0.050 %/°C

Waaree Energies WSMD-440

440 W

PERC

48Marginal

Parameter	Original	Replacement	Deviation
Voc	50.1 V	49.69 V	0.8%
Vmpp	42 V	41.41 V	1.4%
Isc	10.58 A	11.34 A	7.2%
Impp	10.01 A	10.63 A	6.2%
TcVoc	-0.25 %/°C	-0.285 %/°C	±0.035 %/°C
TcPmax	-0.34 %/°C	-0.35 %/°C	±0.010 %/°C

Waaree Energies WSMD-435

435 W

PERC

46Marginal

Parameter	Original	Replacement	Deviation
Voc	50.1 V	49.59 V	1.0%
Vmpp	42 V	41.21 V	1.9%
Isc	10.58 A	11.25 A	6.3%
Impp	10.01 A	10.56 A	5.5%
TcVoc	-0.25 %/°C	-0.285 %/°C	±0.035 %/°C
TcPmax	-0.34 %/°C	-0.35 %/°C	±0.010 %/°C

Trina Solar TSM-NEG9R.28-430

430 W

TOPCon

45Marginal

Parameter	Original	Replacement	Deviation
Voc	50.1 V	51.4 V	2.6%
Vmpp	42 V	43.2 V	2.9%
Isc	10.58 A	10.59 A	0.1%
Impp	10.01 A	9.96 A	0.5%
TcVoc	-0.25 %/°C	-0.24 %/°C	±0.010 %/°C
TcPmax	-0.34 %/°C	-0.29 %/°C	±0.050 %/°C

Waaree Energies WSMD-430

430 W

PERC

40Marginal

Parameter	Original	Replacement	Deviation
Voc	50.1 V	49.39 V	1.4%
Vmpp	42 V	41.01 V	2.4%
Isc	10.58 A	11.19 A	5.8%
Impp	10.01 A	10.49 A	4.8%
TcVoc	-0.25 %/°C	-0.285 %/°C	±0.035 %/°C
TcPmax	-0.34 %/°C	-0.35 %/°C	±0.010 %/°C

Waaree Energies WSMD-425

425 W

PERC

35Marginal

Parameter	Original	Replacement	Deviation
Voc	50.1 V	49.19 V	1.8%
Vmpp	42 V	40.81 V	2.8%
Isc	10.58 A	11.11 A	5.0%
Impp	10.01 A	10.42 A	4.1%
TcVoc	-0.25 %/°C	-0.285 %/°C	±0.035 %/°C
TcPmax	-0.34 %/°C	-0.35 %/°C	±0.010 %/°C

Waaree Energies WSMD-420

420 W

PERC

32Marginal

Parameter	Original	Replacement	Deviation
Voc	50.1 V	49.01 V	2.2%
Vmpp	42 V	40.61 V	3.3%
Isc	10.58 A	11.04 A	4.3%
Impp	10.01 A	10.35 A	3.4%
TcVoc	-0.25 %/°C	-0.285 %/°C	±0.035 %/°C
TcPmax	-0.34 %/°C	-0.35 %/°C	±0.010 %/°C

Luxor Solar LX-440M/166-144+ SW HC

440 W

PERC

29Marginal

Parameter	Original	Replacement	Deviation
Voc	50.1 V	49 V	2.2%
Vmpp	42 V	41.16 V	2.0%
Isc	10.58 A	11.3 A	6.8%
Impp	10.01 A	10.7 A	6.9%
TcVoc	-0.25 %/°C	-0.285 %/°C	±0.035 %/°C
TcPmax	-0.34 %/°C	-0.36 %/°C	±0.020 %/°C

String Compatibility Calculator

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Original Panel Specs

Voc

50.1 V

Vmpp

42 V

Isc

10.58 A

Impp

10.01 A

TcVoc

-0.25 %/°C

TcPmax

-0.34 %/°C

Pmax

420 W

Cells

144

Length

1762 mm

Width

1134 mm

Thickness

30 mm

Weight

21.8 kg

The Trina Solar TSM-DE09R.08-420 is a 420 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
415 W	50 V	10.55 A
425 W	50.2 V	10.61 A
430 W	50.3 V	10.64 A
435 W	50.4 V	10.67 A

Frequently Asked Questions

What specs must match when replacing the Trina Solar TSM-DE09R.08-420?

The most critical specs to match are: cell count (must be exactly 144), Voc close to 50.1 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.

Can I use a higher wattage replacement for the Trina Solar TSM-DE09R.08-420?

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-DE09R.08-420.