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All replacements

Find replacement for Canadian Solar CS7N-645MB-AG

645 W PERC solar panel with 132 cells. Voc 44.8 V · Isc 18.35 A · TcVoc -0.26%/°C.

Select the panel you want to replace

Show only panels with matching cell technology

Compatible Replacements

31 panels found · 4308 panels excluded

RECOM RCM-645-8BMM

645 W

PERC
95Exact match
ParameterOriginalReplacementDeviation
Voc44.8 V44.8 V0.0%
Vmpp37.7 V37.7 V0.0%
Isc18.35 A18.35 A0.0%
Impp17.11 A17.11 A0.0%
TcVoc-0.26 %/°C-0.25 %/°C±0.010 %/°C
TcPmax-0.34 %/°C-0.34 %/°C±0.000 %/°C
Canadian Solar CS7N-640MB-AG

640 W

PERC
92Good match
ParameterOriginalReplacementDeviation
Voc44.8 V44.6 V0.4%
Vmpp37.7 V37.5 V0.5%
Isc18.35 A18.31 A0.2%
Impp17.11 A17.07 A0.2%
TcVoc-0.26 %/°C-0.26 %/°C±0.000 %/°C
TcPmax-0.34 %/°C-0.34 %/°C±0.000 %/°C
Canadian Solar CS7N-650MB-AG

650 W

PERC
91Good match
ParameterOriginalReplacementDeviation
Voc44.8 V45 V0.4%
Vmpp37.7 V37.9 V0.5%
Isc18.35 A18.39 A0.2%
Impp17.11 A17.16 A0.3%
TcVoc-0.26 %/°C-0.26 %/°C±0.000 %/°C
TcPmax-0.34 %/°C-0.34 %/°C±0.000 %/°C
RECOM RCM-650-8BMM

650 W

PERC
86Good match
ParameterOriginalReplacementDeviation
Voc44.8 V45 V0.4%
Vmpp37.7 V37.91 V0.6%
Isc18.35 A18.38 A0.2%
Impp17.11 A17.15 A0.2%
TcVoc-0.26 %/°C-0.25 %/°C±0.010 %/°C
TcPmax-0.34 %/°C-0.34 %/°C±0.000 %/°C
Canadian Solar CS7N-655MB-AG

655 W

PERC
83Good match
ParameterOriginalReplacementDeviation
Voc44.8 V45.2 V0.9%
Vmpp37.7 V38.1 V1.1%
Isc18.35 A18.43 A0.4%
Impp17.11 A17.2 A0.5%
TcVoc-0.26 %/°C-0.26 %/°C±0.000 %/°C
TcPmax-0.34 %/°C-0.34 %/°C±0.000 %/°C
Yingli Solar YL645DF66 f/2

645 W

PERC
81Good match
ParameterOriginalReplacementDeviation
Voc44.8 V45.1 V0.7%
Vmpp37.7 V37.3 V1.1%
Isc18.35 A18.31 A0.2%
Impp17.11 A17.29 A1.1%
TcVoc-0.26 %/°C-0.25 %/°C±0.010 %/°C
TcPmax-0.34 %/°C-0.34 %/°C±0.000 %/°C
Seraphim SRP-645-BMC-HV

645 W

PERC
79Acceptable
ParameterOriginalReplacementDeviation
Voc44.8 V45.28 V1.1%
Vmpp37.7 V37.56 V0.4%
Isc18.35 A18.29 A0.3%
Impp17.11 A17.17 A0.4%
TcVoc-0.26 %/°C-0.25 %/°C±0.010 %/°C
TcPmax-0.34 %/°C-0.34 %/°C±0.000 %/°C
Seraphim SRP-645-BMC-BG

645 W

PERC
79Acceptable
ParameterOriginalReplacementDeviation
Voc44.8 V45.28 V1.1%
Vmpp37.7 V37.56 V0.4%
Isc18.35 A18.29 A0.3%
Impp17.11 A17.17 A0.4%
TcVoc-0.26 %/°C-0.25 %/°C±0.010 %/°C
TcPmax-0.34 %/°C-0.34 %/°C±0.000 %/°C
RECOM RCM-655-8BMM

655 W

PERC
78Acceptable
ParameterOriginalReplacementDeviation
Voc44.8 V45.21 V0.9%
Vmpp37.7 V38.11 V1.1%
Isc18.35 A18.44 A0.5%
Impp17.11 A17.19 A0.5%
TcVoc-0.26 %/°C-0.25 %/°C±0.010 %/°C
TcPmax-0.34 %/°C-0.34 %/°C±0.000 %/°C
Yingli Solar YL650DF66 f/2

650 W

PERC
78Acceptable
ParameterOriginalReplacementDeviation
Voc44.8 V45.3 V1.1%
Vmpp37.7 V37.5 V0.5%
Isc18.35 A18.36 A0.1%
Impp17.11 A17.34 A1.3%
TcVoc-0.26 %/°C-0.25 %/°C±0.010 %/°C
TcPmax-0.34 %/°C-0.34 %/°C±0.000 %/°C
Seraphim SRP-650-BMC-BG

650 W

PERC
75Acceptable
ParameterOriginalReplacementDeviation
Voc44.8 V45.48 V1.5%
Vmpp37.7 V37.76 V0.2%
Isc18.35 A18.34 A0.1%
Impp17.11 A17.21 A0.6%
TcVoc-0.26 %/°C-0.25 %/°C±0.010 %/°C
TcPmax-0.34 %/°C-0.34 %/°C±0.000 %/°C
Seraphim SRP-650-BMC-HV

650 W

PERC
75Acceptable
ParameterOriginalReplacementDeviation
Voc44.8 V45.48 V1.5%
Vmpp37.7 V37.76 V0.2%
Isc18.35 A18.34 A0.1%
Impp17.11 A17.21 A0.6%
TcVoc-0.26 %/°C-0.25 %/°C±0.010 %/°C
TcPmax-0.34 %/°C-0.34 %/°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

44.8 V

Vmpp

37.7 V

Isc

18.35 A

Impp

17.11 A

TcVoc

-0.26 %/°C

TcPmax

-0.34 %/°C

Pmax

645 W

Cells

132

Bifaciality

70%

Length

2384 mm

Width

1303 mm

Thickness

35 mm

Weight

37.9 kg

The Canadian Solar CS7N-645MB-AG 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

ModelPowerVocIsc
CS7N-640MB-AG640 W44.6 V18.31 A
CS7N-650MB-AG650 W45 V18.39 A
CS7N-655MB-AG655 W45.2 V18.43 A
CS7N-660MB-AG660 W45.4 V18.47 A
CS7N-665MB-AG665 W45.6 V18.51 A
CS7N-670MB-AG670 W45.8 V18.55 A

Frequently Asked Questions

What specs must match when replacing the Canadian Solar CS7N-645MB-AG?

The most critical specs to match are: cell count (must be exactly 132), Voc close to 44.8 V (within ±5%), and temperature coefficient TcVoc close to -0.26%/°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 Canadian Solar CS7N-645MB-AG?

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 Canadian Solar CS7N-645MB-AG.