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All replacements

Find replacement for Suntech STP640S-H66-Nsh+

640 W TOPCon solar panel with 132 cells. Voc 49.9 V · Isc 16.31 A · TcVoc -0.25%/°C.

Select the panel you want to replace

Show only panels with matching cell technology

Compatible Replacements

172 panels found · 4167 panels excluded

JinkoSolar JKM640N-66HL4M-BDV

640 W

TOPCon
97Exact match
ParameterOriginalReplacementDeviation
Voc49.9 V49.88 V0.0%
Vmpp41.48 V41.3 V0.4%
Isc16.31 A16.32 A0.1%
Impp15.43 A15.5 A0.5%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
JinkoSolar JKM640N-66HL4M-BDV-Z4

640 W

TOPCon
97Exact match
ParameterOriginalReplacementDeviation
Voc49.9 V49.88 V0.0%
Vmpp41.48 V41.3 V0.4%
Isc16.31 A16.32 A0.1%
Impp15.43 A15.5 A0.5%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
JinkoSolar JKM640N-66HL4M-BDX

640 W

TOPCon
97Exact match
ParameterOriginalReplacementDeviation
Voc49.9 V49.88 V0.0%
Vmpp41.48 V41.3 V0.4%
Isc16.31 A16.32 A0.1%
Impp15.43 A15.5 A0.5%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
JinkoSolar JKM645N-66HL4M-BDX

645 W

TOPCon
94Good match
ParameterOriginalReplacementDeviation
Voc49.9 V50.08 V0.4%
Vmpp41.48 V41.44 V0.1%
Isc16.31 A16.38 A0.4%
Impp15.43 A15.57 A0.9%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
DMEGC GH635G12RT-B66HST

635 W

TOPCon
94Good match
ParameterOriginalReplacementDeviation
Voc49.9 V49.69 V0.4%
Vmpp41.48 V41.45 V0.1%
Isc16.31 A16.29 A0.1%
Impp15.43 A15.35 A0.5%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
JinkoSolar JKM645N-66HL4M-BDV-Z4

645 W

TOPCon
94Good match
ParameterOriginalReplacementDeviation
Voc49.9 V50.08 V0.4%
Vmpp41.48 V41.44 V0.1%
Isc16.31 A16.38 A0.4%
Impp15.43 A15.57 A0.9%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
JinkoSolar JKM645N-66HL4M-BDV

645 W

TOPCon
94Good match
ParameterOriginalReplacementDeviation
Voc49.9 V50.08 V0.4%
Vmpp41.48 V41.44 V0.1%
Isc16.31 A16.38 A0.4%
Impp15.43 A15.57 A0.9%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
DMEGC DM635G12RT-B66HSW

635 W

TOPCon
94Good match
ParameterOriginalReplacementDeviation
Voc49.9 V49.69 V0.4%
Vmpp41.48 V41.45 V0.1%
Isc16.31 A16.29 A0.1%
Impp15.43 A15.35 A0.5%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
Luxor Solar LX-645M/182R-132+ GG SW ECOLINE

645 W

TOPCon
93Good match
ParameterOriginalReplacementDeviation
Voc49.9 V49.89 V0.0%
Vmpp41.48 V41.21 V0.7%
Isc16.31 A16.55 A1.5%
Impp15.43 A15.66 A1.5%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
Leapton Energy LP182*210-M-66-NB-630W

630 W

TOPCon
92Good match
ParameterOriginalReplacementDeviation
Voc49.9 V49.95 V0.1%
Vmpp41.48 V41.46 V0.0%
Isc16.31 A16.05 A1.6%
Impp15.43 A15.2 A1.5%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.3 %/°C±0.010 %/°C
DMEGC DM655G12RT-B66HSW

655 W

TOPCon
92Good match
ParameterOriginalReplacementDeviation
Voc49.9 V49.86 V0.1%
Vmpp41.48 V41.7 V0.5%
Isc16.31 A16.63 A2.0%
Impp15.43 A15.72 A1.9%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
Suntech STP645S-H66-Nsh+

645 W

TOPCon
92Good match
ParameterOriginalReplacementDeviation
Voc49.9 V50.1 V0.4%
Vmpp41.48 V41.64 V0.4%
Isc16.31 A16.37 A0.4%
Impp15.43 A15.49 A0.4%
TcVoc-0.25 %/°C-0.25 %/°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

49.9 V

Vmpp

41.48 V

Isc

16.31 A

Impp

15.43 A

TcVoc

-0.25 %/°C

TcPmax

-0.29 %/°C

Pmax

640 W

Cells

132

Bifaciality

80%

Length

2382 mm

Width

1134 mm

Thickness

30 mm

Weight

32.5 kg

The Suntech STP640S-H66-Nsh+ is a 640 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

ModelPowerVocIsc
STP630S-H66-Nsh+630 W49.5 V16.19 A
STP635S-H66-Nsh+635 W49.7 V16.25 A
STP645S-H66-Nsh+645 W50.1 V16.37 A
STP650S-H66-Nsh+650 W50.3 V16.43 A

Frequently Asked Questions

What specs must match when replacing the Suntech STP640S-H66-Nsh+?

The most critical specs to match are: cell count (must be exactly 132), Voc close to 49.9 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 Suntech STP640S-H66-Nsh+?

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 Suntech STP640S-H66-Nsh+.