Find replacement for LONGi LR5-54HIH-420M

420 W PERC solar panel with 108 cells. Voc 37.75 V · Isc 14.01 A · TcVoc -0.265%/°C.

Original Panel

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Same technology onlyShow only panels with matching cell technology

Compatible Replacements

86 panels found · 3425 panels excluded

LONGi LR5-54HPH-420M

420 W

PERC

100Exact match

Parameter	Original	Replacement	Deviation
Voc	37.75 V	37.75 V	0.0%
Vmpp	31.73 V	31.73 V	0.0%
Isc	14.01 A	14.01 A	0.0%
Impp	13.24 A	13.24 A	0.0%
TcVoc	-0.265 %/°C	-0.265 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

LONGi LR5-54HPH-425M

425 W

PERC

91Good match

Parameter	Original	Replacement	Deviation
Voc	37.75 V	37.9 V	0.4%
Vmpp	31.73 V	31.94 V	0.7%
Isc	14.01 A	14.08 A	0.5%
Impp	13.24 A	13.31 A	0.5%
TcVoc	-0.265 %/°C	-0.265 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Sunway SW420M-108

420 W

PERC

89Good match

Parameter	Original	Replacement	Deviation
Voc	37.75 V	37.56 V	0.5%
Vmpp	31.73 V	31.6 V	0.4%
Isc	14.01 A	13.98 A	0.2%
Impp	13.24 A	13.3 A	0.5%
TcVoc	-0.265 %/°C	-0.27 %/°C	±0.005 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

LONGi LR5-54HPH-415M

415 W

PERC

87Good match

Parameter	Original	Replacement	Deviation
Voc	37.75 V	37.5 V	0.7%
Vmpp	31.73 V	31.49 V	0.8%
Isc	14.01 A	13.94 A	0.5%
Impp	13.24 A	13.18 A	0.5%
TcVoc	-0.265 %/°C	-0.265 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

LONGi LR5-54HIH-415M

415 W

PERC

87Good match

Parameter	Original	Replacement	Deviation
Voc	37.75 V	37.5 V	0.7%
Vmpp	31.73 V	31.49 V	0.8%
Isc	14.01 A	13.94 A	0.5%
Impp	13.24 A	13.18 A	0.5%
TcVoc	-0.265 %/°C	-0.265 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Sunway SW425M-108

425 W

PERC

87Good match

Parameter	Original	Replacement	Deviation
Voc	37.75 V	37.96 V	0.6%
Vmpp	31.73 V	31.9 V	0.5%
Isc	14.01 A	14.08 A	0.5%
Impp	13.24 A	13.33 A	0.7%
TcVoc	-0.265 %/°C	-0.27 %/°C	±0.005 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

TommaTech TT415-108TNFB10 Dark Series

415 W

TOPCon

84Good match

Parameter	Original	Replacement	Deviation
Voc	37.75 V	37.71 V	0.1%
Vmpp	31.73 V	31.74 V	0.0%
Isc	14.01 A	13.88 A	0.9%
Impp	13.24 A	13.08 A	1.2%
TcVoc	-0.265 %/°C	-0.26 %/°C	±0.005 %/°C
TcPmax	-0.34 %/°C	-0.3 %/°C	±0.040 %/°C

Luxor Solar LX-415M/182-108+ BB HC

415 W

PERC

81Good match

Parameter	Original	Replacement	Deviation
Voc	37.75 V	37.76 V	0.0%
Vmpp	31.73 V	31.72 V	0.0%
Isc	14.01 A	13.82 A	1.4%
Impp	13.24 A	13.09 A	1.1%
TcVoc	-0.265 %/°C	-0.285 %/°C	±0.020 %/°C
TcPmax	-0.34 %/°C	-0.36 %/°C	±0.020 %/°C

Sunway SW415M-108

415 W

PERC

81Good match

Parameter	Original	Replacement	Deviation
Voc	37.75 V	37.41 V	0.9%
Vmpp	31.73 V	31.45 V	0.9%
Isc	14.01 A	13.89 A	0.9%
Impp	13.24 A	13.2 A	0.3%
TcVoc	-0.265 %/°C	-0.27 %/°C	±0.005 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Jolywood JW-HT108N-415

415 W

TOPCon

79Acceptable

Parameter	Original	Replacement	Deviation
Voc	37.75 V	37.7 V	0.1%
Vmpp	31.73 V	31.7 V	0.1%
Isc	14.01 A	13.91 A	0.7%
Impp	13.24 A	13.1 A	1.1%
TcVoc	-0.265 %/°C	-0.25 %/°C	±0.015 %/°C
TcPmax	-0.34 %/°C	-0.3 %/°C	±0.040 %/°C

TommaTech TT420-108TNFB10 Dark Series

420 W

TOPCon

78Acceptable

Parameter	Original	Replacement	Deviation
Voc	37.75 V	37.91 V	0.4%
Vmpp	31.73 V	31.94 V	0.7%
Isc	14.01 A	13.95 A	0.4%
Impp	13.24 A	13.15 A	0.7%
TcVoc	-0.265 %/°C	-0.26 %/°C	±0.005 %/°C
TcPmax	-0.34 %/°C	-0.3 %/°C	±0.040 %/°C

Luxor Solar LX-415M/182-108+ BW HC

415 W

PERC

77Acceptable

Parameter	Original	Replacement	Deviation
Voc	37.75 V	37.86 V	0.3%
Vmpp	31.73 V	31.8 V	0.2%
Isc	14.01 A	13.79 A	1.6%
Impp	13.24 A	13.06 A	1.4%
TcVoc	-0.265 %/°C	-0.285 %/°C	±0.020 %/°C
TcPmax	-0.34 %/°C	-0.36 %/°C	±0.020 %/°C

String Compatibility Calculator

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Panel Matcher

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Original Panel Specs

Voc

37.75 V

Vmpp

31.73 V

Isc

14.01 A

Impp

13.24 A

TcVoc

-0.265 %/°C

TcPmax

-0.34 %/°C

Pmax

420 W

Cells

108

Length

1722 mm

Width

1134 mm

Thickness

30 mm

Weight

20.8 kg

The LONGi LR5-54HIH-420M 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
400 W	36.75 V	13.76 A
405 W	37 V	13.83 A
410 W	37.25 V	13.88 A
415 W	37.5 V	13.94 A

Frequently Asked Questions

What specs must match when replacing the LONGi LR5-54HIH-420M?

The most critical specs to match are: cell count (must be exactly 108), Voc close to 37.75 V (within ±5%), and temperature coefficient TcVoc close to -0.265%/°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 LONGi LR5-54HIH-420M?

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 LONGi LR5-54HIH-420M.