Find replacement for LONGi LGi7-72HVD-645M

645 W HPBC solar panel with 144 cells. Voc 53.8 V · Isc 15.21 A · TcVoc -0.2%/°C.

Original Panel

Select the panel you want to replace

Same technology onlyShow only panels with matching cell technology

Compatible Replacements

41 panels found · 3669 panels excluded

LONGi LR7-72HVHF-645M

645 W

HPBC

100Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.8 V	0.0%
Vmpp	44.46 V	44.46 V	0.0%
Isc	15.21 A	15.21 A	0.0%
Impp	14.51 A	14.51 A	0.0%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LR7-72HVH-645M

645 W

HPBC

100Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.8 V	0.0%
Vmpp	44.46 V	44.46 V	0.0%
Isc	15.21 A	15.21 A	0.0%
Impp	14.51 A	14.51 A	0.0%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LR7-72HVHF-650M

650 W

HPBC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.9 V	0.2%
Vmpp	44.46 V	44.56 V	0.2%
Isc	15.21 A	15.29 A	0.5%
Impp	14.51 A	14.59 A	0.6%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LGi7-72HVD-640M

640 W

HPBC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.7 V	0.2%
Vmpp	44.46 V	44.36 V	0.2%
Isc	15.21 A	15.13 A	0.5%
Impp	14.51 A	14.43 A	0.6%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LGi7-72HVD-650M

650 W

HPBC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.9 V	0.2%
Vmpp	44.46 V	44.56 V	0.2%
Isc	15.21 A	15.29 A	0.5%
Impp	14.51 A	14.59 A	0.6%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LR7-72HVH-640M

640 W

HPBC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.7 V	0.2%
Vmpp	44.46 V	44.36 V	0.2%
Isc	15.21 A	15.13 A	0.5%
Impp	14.51 A	14.43 A	0.6%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LR7-72HVHF-640M

640 W

HPBC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.7 V	0.2%
Vmpp	44.46 V	44.36 V	0.2%
Isc	15.21 A	15.13 A	0.5%
Impp	14.51 A	14.43 A	0.6%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LR7-72HVH-650M

650 W

HPBC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.9 V	0.2%
Vmpp	44.46 V	44.56 V	0.2%
Isc	15.21 A	15.29 A	0.5%
Impp	14.51 A	14.59 A	0.6%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LGi7-72HYD-630M

630 W

HPBC

93Good match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.82 V	0.0%
Vmpp	44.46 V	44.47 V	0.0%
Isc	15.21 A	14.81 A	2.6%
Impp	14.51 A	14.17 A	2.3%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LR7-72HVH-635M

635 W

HPBC

91Good match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.6 V	0.4%
Vmpp	44.46 V	44.26 V	0.4%
Isc	15.21 A	15.05 A	1.1%
Impp	14.51 A	14.35 A	1.1%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LGi7-72HVD-655M

655 W

HPBC

91Good match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	54 V	0.4%
Vmpp	44.46 V	44.66 V	0.4%
Isc	15.21 A	15.37 A	1.1%
Impp	14.51 A	14.67 A	1.1%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LGi7-72HYD-635M

635 W

HPBC

91Good match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.92 V	0.2%
Vmpp	44.46 V	44.57 V	0.2%
Isc	15.21 A	14.89 A	2.1%
Impp	14.51 A	14.25 A	1.8%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°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

53.8 V

Vmpp

44.46 V

Isc

15.21 A

Impp

14.51 A

TcVoc

-0.2 %/°C

TcPmax

-0.26 %/°C

Pmax

645 W

Cells

144

Length

2382 mm

Width

1134 mm

Thickness

30 mm

Weight

35.7 kg

The LONGi LGi7-72HVD-645M is a 645 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
LGi7-72HVD-640M	640 W	53.7 V	15.13 A
LGi7-72HVD-650M	650 W	53.9 V	15.29 A
LGi7-72HVD-655M	655 W	54 V	15.37 A
LGi7-72HVD-660M	660 W	54.1 V	15.45 A
LGi7-72HVD-665M	665 W	54.2 V	15.52 A
LGi7-72HVD-670M	670 W	54.3 V	15.6 A

Frequently Asked Questions

What specs must match when replacing the LONGi LGi7-72HVD-645M?

The most critical specs to match are: cell count (must be exactly 144), Voc close to 53.8 V (within ±5%), and temperature coefficient TcVoc close to -0.2%/°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 LGi7-72HVD-645M?

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 LGi7-72HVD-645M.

All replacements

Find replacement for LONGi LGi7-72HVD-645M

645 W HPBC solar panel with 144 cells. Voc 53.8 V · Isc 15.21 A · TcVoc -0.2%/°C.

Original Panel

Select the panel you want to replace

Same technology onlyShow only panels with matching cell technology

Compatible Replacements

41 panels found · 3669 panels excluded

LONGi LR7-72HVHF-645M

645 W

HPBC

100Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.8 V	0.0%
Vmpp	44.46 V	44.46 V	0.0%
Isc	15.21 A	15.21 A	0.0%
Impp	14.51 A	14.51 A	0.0%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LR7-72HVH-645M

645 W

HPBC

100Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.8 V	0.0%
Vmpp	44.46 V	44.46 V	0.0%
Isc	15.21 A	15.21 A	0.0%
Impp	14.51 A	14.51 A	0.0%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LR7-72HVHF-650M

650 W

HPBC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.9 V	0.2%
Vmpp	44.46 V	44.56 V	0.2%
Isc	15.21 A	15.29 A	0.5%
Impp	14.51 A	14.59 A	0.6%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LGi7-72HVD-640M

640 W

HPBC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.7 V	0.2%
Vmpp	44.46 V	44.36 V	0.2%
Isc	15.21 A	15.13 A	0.5%
Impp	14.51 A	14.43 A	0.6%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LGi7-72HVD-650M

650 W

HPBC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.9 V	0.2%
Vmpp	44.46 V	44.56 V	0.2%
Isc	15.21 A	15.29 A	0.5%
Impp	14.51 A	14.59 A	0.6%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LR7-72HVH-640M

640 W

HPBC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.7 V	0.2%
Vmpp	44.46 V	44.36 V	0.2%
Isc	15.21 A	15.13 A	0.5%
Impp	14.51 A	14.43 A	0.6%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LR7-72HVHF-640M

640 W

HPBC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.7 V	0.2%
Vmpp	44.46 V	44.36 V	0.2%
Isc	15.21 A	15.13 A	0.5%
Impp	14.51 A	14.43 A	0.6%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LR7-72HVH-650M

650 W

HPBC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.9 V	0.2%
Vmpp	44.46 V	44.56 V	0.2%
Isc	15.21 A	15.29 A	0.5%
Impp	14.51 A	14.59 A	0.6%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LGi7-72HYD-630M

630 W

HPBC

93Good match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.82 V	0.0%
Vmpp	44.46 V	44.47 V	0.0%
Isc	15.21 A	14.81 A	2.6%
Impp	14.51 A	14.17 A	2.3%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LR7-72HVH-635M

635 W

HPBC

91Good match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.6 V	0.4%
Vmpp	44.46 V	44.26 V	0.4%
Isc	15.21 A	15.05 A	1.1%
Impp	14.51 A	14.35 A	1.1%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LGi7-72HVD-655M

655 W

HPBC

91Good match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	54 V	0.4%
Vmpp	44.46 V	44.66 V	0.4%
Isc	15.21 A	15.37 A	1.1%
Impp	14.51 A	14.67 A	1.1%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°C	±0.000 %/°C

LONGi LGi7-72HYD-635M

635 W

HPBC

91Good match

Parameter	Original	Replacement	Deviation
Voc	53.8 V	53.92 V	0.2%
Vmpp	44.46 V	44.57 V	0.2%
Isc	15.21 A	14.89 A	2.1%
Impp	14.51 A	14.25 A	1.8%
TcVoc	-0.2 %/°C	-0.2 %/°C	±0.000 %/°C
TcPmax	-0.26 %/°C	-0.26 %/°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

53.8 V

Vmpp

44.46 V

Isc

15.21 A

Impp

14.51 A

TcVoc

-0.2 %/°C

TcPmax

-0.26 %/°C

Pmax

645 W

Cells

144

Length

2382 mm

Width

1134 mm

Thickness

30 mm

Weight

35.7 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
LGi7-72HVD-640M	640 W	53.7 V	15.13 A
LGi7-72HVD-650M	650 W	53.9 V	15.29 A
LGi7-72HVD-655M	655 W	54 V	15.37 A
LGi7-72HVD-660M	660 W	54.1 V	15.45 A
LGi7-72HVD-665M	665 W	54.2 V	15.52 A
LGi7-72HVD-670M	670 W	54.3 V	15.6 A