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All replacements

Find replacement for Yingli Solar YL640CF66 i/2

640 W TOPCon solar panel with 132 cells. Voc 49.8 V · Isc 16.32 A · TcVoc -0.24%/°C.

Select the panel you want to replace

Show only panels with matching cell technology

Compatible Replacements

200 panels found · 4139 panels excluded

Yingli Solar YL635CF66 i/2

635 W

TOPCon
93Good match
ParameterOriginalReplacementDeviation
Voc49.8 V49.62 V0.4%
Vmpp41.8 V41.64 V0.4%
Isc16.32 A16.25 A0.4%
Impp15.31 A15.25 A0.4%
TcVoc-0.24 %/°C-0.24 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
Yingli Solar YL645CF66 i/2

645 W

TOPCon
93Good match
ParameterOriginalReplacementDeviation
Voc49.8 V49.98 V0.4%
Vmpp41.8 V41.96 V0.4%
Isc16.32 A16.39 A0.4%
Impp15.31 A15.37 A0.4%
TcVoc-0.24 %/°C-0.24 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
AE Solar CMER-132BDS-625

625 W

TOPCon
92Good match
ParameterOriginalReplacementDeviation
Voc49.8 V49.9 V0.2%
Vmpp41.8 V41.7 V0.2%
Isc16.32 A16.06 A1.6%
Impp15.31 A14.99 A2.1%
TcVoc-0.24 %/°C-0.24 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
Heckert Solar ZEUS 2.1 132-640

640 W

TOPCon
91Good match
ParameterOriginalReplacementDeviation
Voc49.8 V49.75 V0.1%
Vmpp41.8 V41.38 V1.0%
Isc16.32 A16.33 A0.1%
Impp15.31 A15.47 A1.0%
TcVoc-0.24 %/°C-0.24 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.28 %/°C±0.010 %/°C
Tongwei TWMNH-66HD640

640 W

TOPCon
91Good match
ParameterOriginalReplacementDeviation
Voc49.8 V49.75 V0.1%
Vmpp41.8 V41.38 V1.0%
Isc16.32 A16.33 A0.1%
Impp15.31 A15.47 A1.0%
TcVoc-0.24 %/°C-0.24 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.28 %/°C±0.010 %/°C
Tongwei TWMNH-66HD645

645 W

TOPCon
91Good match
ParameterOriginalReplacementDeviation
Voc49.8 V49.85 V0.1%
Vmpp41.8 V41.51 V0.7%
Isc16.32 A16.39 A0.4%
Impp15.31 A15.54 A1.5%
TcVoc-0.24 %/°C-0.24 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.28 %/°C±0.010 %/°C
Trina Solar TSM-NEG19RC.20-650

650 W

TOPCon
90Good match
ParameterOriginalReplacementDeviation
Voc49.8 V49.77 V0.1%
Vmpp41.8 V41.43 V0.9%
Isc16.32 A16.59 A1.7%
Impp15.31 A15.69 A2.5%
TcVoc-0.24 %/°C-0.24 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
Tongwei TWMNH-66HD650

650 W

TOPCon
88Good match
ParameterOriginalReplacementDeviation
Voc49.8 V50 V0.4%
Vmpp41.8 V41.65 V0.4%
Isc16.32 A16.45 A0.8%
Impp15.31 A15.61 A2.0%
TcVoc-0.24 %/°C-0.24 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.28 %/°C±0.010 %/°C
Astronergy CHSM66RNDGF-BH645

645 W

TOPCon
88Good match
ParameterOriginalReplacementDeviation
Voc49.8 V49.72 V0.2%
Vmpp41.8 V42.11 V0.7%
Isc16.32 A16.5 A1.1%
Impp15.31 A15.32 A0.1%
TcVoc-0.24 %/°C-0.25 %/°C±0.010 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
DMEGC GH635G12RT-B66HST

635 W

TOPCon
88Good match
ParameterOriginalReplacementDeviation
Voc49.8 V49.69 V0.2%
Vmpp41.8 V41.45 V0.8%
Isc16.32 A16.29 A0.2%
Impp15.31 A15.35 A0.3%
TcVoc-0.24 %/°C-0.25 %/°C±0.010 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
Suntech STP640S-H66-Nsh+

640 W

TOPCon
88Good match
ParameterOriginalReplacementDeviation
Voc49.8 V49.9 V0.2%
Vmpp41.8 V41.48 V0.8%
Isc16.32 A16.31 A0.1%
Impp15.31 A15.43 A0.8%
TcVoc-0.24 %/°C-0.25 %/°C±0.010 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
DMEGC DM635G12RT-B66HSW

635 W

TOPCon
88Good match
ParameterOriginalReplacementDeviation
Voc49.8 V49.69 V0.2%
Vmpp41.8 V41.45 V0.8%
Isc16.32 A16.29 A0.2%
Impp15.31 A15.35 A0.3%
TcVoc-0.24 %/°C-0.25 %/°C±0.010 %/°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

49.8 V

Vmpp

41.8 V

Isc

16.32 A

Impp

15.31 A

TcVoc

-0.24 %/°C

TcPmax

-0.29 %/°C

Pmax

640 W

Cells

132

Bifaciality

80%

Length

2384 mm

Width

1303 mm

Thickness

33 mm

Weight

37 kg

The Yingli Solar YL640CF66 i/2 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
YL620CF66 i/2620 W49.08 V16.04 A
YL625CF66 i/2625 W49.26 V16.11 A
YL630CF66 i/2630 W49.44 V16.18 A
YL635CF66 i/2635 W49.62 V16.25 A
YL645CF66 i/2645 W49.98 V16.39 A

Frequently Asked Questions

What specs must match when replacing the Yingli Solar YL640CF66 i/2?

The most critical specs to match are: cell count (must be exactly 132), Voc close to 49.8 V (within ±5%), and temperature coefficient TcVoc close to -0.24%/°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 Yingli Solar YL640CF66 i/2?

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 Yingli Solar YL640CF66 i/2.