Find replacement for LONGi LR5-66HTH-520M

520 W HPBC solar panel with 132 cells. Voc 48.27 V · Isc 13.84 A · TcVoc -0.23%/°C.

Original Panel

Select the panel you want to replace

Same technology onlyShow only panels with matching cell technology

Compatible Replacements

12 panels found · 4327 panels excluded

LONGi LR5-66HTH-525M

525 W

HPBC

93Good match

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.42 V	0.3%
Vmpp	39.91 V	40.06 V	0.4%
Isc	13.84 A	13.93 A	0.7%
Impp	13.03 A	13.11 A	0.6%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

LONGi LR5-66HTH-530M

530 W

HPBC

86Good match

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.57 V	0.6%
Vmpp	39.91 V	40.22 V	0.8%
Isc	13.84 A	14 A	1.2%
Impp	13.03 A	13.18 A	1.2%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Horay Solar HS540TC-MHO

540 W

TOPCon

81Good match

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.27 V	0.0%
Vmpp	39.91 V	40.64 V	1.8%
Isc	13.84 A	14.35 A	3.7%
Impp	13.03 A	13.29 A	2.0%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.28 %/°C	±0.010 %/°C

Horay Solar HS535TC-MHO

535 W

TOPCon

79Acceptable

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.04 V	0.5%
Vmpp	39.91 V	40.44 V	1.3%
Isc	13.84 A	14.29 A	3.3%
Impp	13.03 A	13.23 A	1.5%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.28 %/°C	±0.010 %/°C

LONGi LR5-66HTH-535M

535 W

HPBC

79Acceptable

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.72 V	0.9%
Vmpp	39.91 V	40.38 V	1.2%
Isc	13.84 A	14.07 A	1.7%
Impp	13.03 A	13.25 A	1.7%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Perlight Solar PLM-540DH8N-132

540 W

TOPCon

76Acceptable

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.35 V	0.2%
Vmpp	39.91 V	40.61 V	1.8%
Isc	13.84 A	13.88 A	0.3%
Impp	13.03 A	13.3 A	2.1%
TcVoc	-0.23 %/°C	-0.25 %/°C	±0.020 %/°C
TcPmax	-0.29 %/°C	-0.3 %/°C	±0.010 %/°C

Horay Solar HS530TC-MHO

530 W

TOPCon

76Acceptable

Parameter	Original	Replacement	Deviation
Voc	48.27 V	47.81 V	1.0%
Vmpp	39.91 V	40.24 V	0.8%
Isc	13.84 A	14.22 A	2.7%
Impp	13.03 A	13.17 A	1.1%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.28 %/°C	±0.010 %/°C

LONGi LR5-66HTH-540M

540 W

HPBC

72Acceptable

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.87 V	1.2%
Vmpp	39.91 V	40.53 V	1.6%
Isc	13.84 A	14.15 A	2.2%
Impp	13.03 A	13.33 A	2.3%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Horay Solar HS540TC-MHA

540 W

TOPCon

71Acceptable

Parameter	Original	Replacement	Deviation
Voc	48.27 V	47.68 V	1.2%
Vmpp	39.91 V	39.79 V	0.3%
Isc	13.84 A	14.34 A	3.6%
Impp	13.03 A	13.57 A	4.1%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.28 %/°C	±0.010 %/°C

Sun Earth DXM8-66H 540W

540 W

TOPCon

55Marginal

Parameter	Original	Replacement	Deviation
Voc	48.27 V	47.4 V	1.8%
Vmpp	39.91 V	39.1 V	2.0%
Isc	13.84 A	14.49 A	4.7%
Impp	13.03 A	13.81 A	6.0%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

EcoFlow EF-SG-520

520 W

TOPCon

55Marginal

Parameter	Original	Replacement	Deviation
Voc	48.27 V	47 V	2.6%
Vmpp	39.91 V	40.1 V	0.5%
Isc	13.84 A	13.4 A	3.2%
Impp	13.03 A	13 A	0.2%
TcVoc	-0.23 %/°C	-0.25 %/°C	±0.020 %/°C
TcPmax	-0.29 %/°C	-0.3 %/°C	±0.010 %/°C

Sun Earth DXM8-66H 530W

530 W

TOPCon

54Marginal

Parameter	Original	Replacement	Deviation
Voc	48.27 V	47 V	2.6%
Vmpp	39.91 V	38.9 V	2.5%
Isc	13.84 A	14.35 A	3.7%
Impp	13.03 A	13.62 A	4.5%
TcVoc	-0.23 %/°C	-0.23 %/°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

48.27 V

Vmpp

39.91 V

Isc

13.84 A

Impp

13.03 A

TcVoc

-0.23 %/°C

TcPmax

-0.29 %/°C

Pmax

520 W

Cells

132

Length

2094 mm

Width

1134 mm

Thickness

35 mm

Weight

26 kg

The LONGi LR5-66HTH-520M 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
LR5-66HTH-525M	525 W	48.42 V	13.93 A
LR5-66HTH-530M	530 W	48.57 V	14 A
LR5-66HTH-535M	535 W	48.72 V	14.07 A
LR5-66HTH-540M	540 W	48.87 V	14.15 A

Frequently Asked Questions

What specs must match when replacing the LONGi LR5-66HTH-520M?

The most critical specs to match are: cell count (must be exactly 132), Voc close to 48.27 V (within ±5%), and temperature coefficient TcVoc close to -0.23%/°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 LR5-66HTH-520M?

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 LR5-66HTH-520M.

All replacements

Find replacement for LONGi LR5-66HTH-520M

520 W HPBC solar panel with 132 cells. Voc 48.27 V · Isc 13.84 A · TcVoc -0.23%/°C.

Original Panel

Select the panel you want to replace

Same technology onlyShow only panels with matching cell technology

Compatible Replacements

12 panels found · 4327 panels excluded

LONGi LR5-66HTH-525M

525 W

HPBC

93Good match

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.42 V	0.3%
Vmpp	39.91 V	40.06 V	0.4%
Isc	13.84 A	13.93 A	0.7%
Impp	13.03 A	13.11 A	0.6%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

LONGi LR5-66HTH-530M

530 W

HPBC

86Good match

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.57 V	0.6%
Vmpp	39.91 V	40.22 V	0.8%
Isc	13.84 A	14 A	1.2%
Impp	13.03 A	13.18 A	1.2%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Horay Solar HS540TC-MHO

540 W

TOPCon

81Good match

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.27 V	0.0%
Vmpp	39.91 V	40.64 V	1.8%
Isc	13.84 A	14.35 A	3.7%
Impp	13.03 A	13.29 A	2.0%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.28 %/°C	±0.010 %/°C

Horay Solar HS535TC-MHO

535 W

TOPCon

79Acceptable

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.04 V	0.5%
Vmpp	39.91 V	40.44 V	1.3%
Isc	13.84 A	14.29 A	3.3%
Impp	13.03 A	13.23 A	1.5%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.28 %/°C	±0.010 %/°C

LONGi LR5-66HTH-535M

535 W

HPBC

79Acceptable

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.72 V	0.9%
Vmpp	39.91 V	40.38 V	1.2%
Isc	13.84 A	14.07 A	1.7%
Impp	13.03 A	13.25 A	1.7%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Perlight Solar PLM-540DH8N-132

540 W

TOPCon

76Acceptable

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.35 V	0.2%
Vmpp	39.91 V	40.61 V	1.8%
Isc	13.84 A	13.88 A	0.3%
Impp	13.03 A	13.3 A	2.1%
TcVoc	-0.23 %/°C	-0.25 %/°C	±0.020 %/°C
TcPmax	-0.29 %/°C	-0.3 %/°C	±0.010 %/°C

Horay Solar HS530TC-MHO

530 W

TOPCon

76Acceptable

Parameter	Original	Replacement	Deviation
Voc	48.27 V	47.81 V	1.0%
Vmpp	39.91 V	40.24 V	0.8%
Isc	13.84 A	14.22 A	2.7%
Impp	13.03 A	13.17 A	1.1%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.28 %/°C	±0.010 %/°C

LONGi LR5-66HTH-540M

540 W

HPBC

72Acceptable

Parameter	Original	Replacement	Deviation
Voc	48.27 V	48.87 V	1.2%
Vmpp	39.91 V	40.53 V	1.6%
Isc	13.84 A	14.15 A	2.2%
Impp	13.03 A	13.33 A	2.3%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

Horay Solar HS540TC-MHA

540 W

TOPCon

71Acceptable

Parameter	Original	Replacement	Deviation
Voc	48.27 V	47.68 V	1.2%
Vmpp	39.91 V	39.79 V	0.3%
Isc	13.84 A	14.34 A	3.6%
Impp	13.03 A	13.57 A	4.1%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.28 %/°C	±0.010 %/°C

Sun Earth DXM8-66H 540W

540 W

TOPCon

55Marginal

Parameter	Original	Replacement	Deviation
Voc	48.27 V	47.4 V	1.8%
Vmpp	39.91 V	39.1 V	2.0%
Isc	13.84 A	14.49 A	4.7%
Impp	13.03 A	13.81 A	6.0%
TcVoc	-0.23 %/°C	-0.23 %/°C	±0.000 %/°C
TcPmax	-0.29 %/°C	-0.29 %/°C	±0.000 %/°C

EcoFlow EF-SG-520

520 W

TOPCon

55Marginal

Parameter	Original	Replacement	Deviation
Voc	48.27 V	47 V	2.6%
Vmpp	39.91 V	40.1 V	0.5%
Isc	13.84 A	13.4 A	3.2%
Impp	13.03 A	13 A	0.2%
TcVoc	-0.23 %/°C	-0.25 %/°C	±0.020 %/°C
TcPmax	-0.29 %/°C	-0.3 %/°C	±0.010 %/°C

Sun Earth DXM8-66H 530W

530 W

TOPCon

54Marginal

Parameter	Original	Replacement	Deviation
Voc	48.27 V	47 V	2.6%
Vmpp	39.91 V	38.9 V	2.5%
Isc	13.84 A	14.35 A	3.7%
Impp	13.03 A	13.62 A	4.5%
TcVoc	-0.23 %/°C	-0.23 %/°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

48.27 V

Vmpp

39.91 V

Isc

13.84 A

Impp

13.03 A

TcVoc

-0.23 %/°C

TcPmax

-0.29 %/°C

Pmax

520 W

Cells

132

Length

2094 mm

Width

1134 mm

Thickness

35 mm

Weight

26 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
LR5-66HTH-525M	525 W	48.42 V	13.93 A
LR5-66HTH-530M	530 W	48.57 V	14 A
LR5-66HTH-535M	535 W	48.72 V	14.07 A
LR5-66HTH-540M	540 W	48.87 V	14.15 A