Find replacement for RECOM RCM-645-8BMM

645 W PERC solar panel with 132 cells. Voc 44.8 V · Isc 18.35 A · TcVoc -0.25%/°C.

Original Panel

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Same technology onlyShow only panels with matching cell technology

Compatible Replacements

25 panels found · 3675 panels excluded

Canadian Solar CS7N-645MB-AG

645 W

PERC

95Exact match

Parameter	Original	Replacement	Deviation
Voc	44.8 V	44.8 V	0.0%
Vmpp	37.7 V	37.7 V	0.0%
Isc	18.35 A	18.35 A	0.0%
Impp	17.11 A	17.11 A	0.0%
TcVoc	-0.25 %/°C	-0.26 %/°C	±0.010 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

RECOM RCM-650-8BMM

650 W

PERC

91Good match

Parameter	Original	Replacement	Deviation
Voc	44.8 V	45 V	0.4%
Vmpp	37.7 V	37.91 V	0.6%
Isc	18.35 A	18.38 A	0.2%
Impp	17.11 A	17.15 A	0.2%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Canadian Solar CS7N-640MB-AG

640 W

PERC

87Good match

Parameter	Original	Replacement	Deviation
Voc	44.8 V	44.6 V	0.4%
Vmpp	37.7 V	37.5 V	0.5%
Isc	18.35 A	18.31 A	0.2%
Impp	17.11 A	17.07 A	0.2%
TcVoc	-0.25 %/°C	-0.26 %/°C	±0.010 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Canadian Solar CS7N-650MB-AG

650 W

PERC

86Good match

Parameter	Original	Replacement	Deviation
Voc	44.8 V	45 V	0.4%
Vmpp	37.7 V	37.9 V	0.5%
Isc	18.35 A	18.39 A	0.2%
Impp	17.11 A	17.16 A	0.3%
TcVoc	-0.25 %/°C	-0.26 %/°C	±0.010 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Yingli Solar YL645DF66 f/2

645 W

PERC

86Good match

Parameter	Original	Replacement	Deviation
Voc	44.8 V	45.1 V	0.7%
Vmpp	37.7 V	37.3 V	1.1%
Isc	18.35 A	18.31 A	0.2%
Impp	17.11 A	17.29 A	1.1%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Seraphim SRP-645-BMC-HV

645 W

PERC

84Good match

Parameter	Original	Replacement	Deviation
Voc	44.8 V	45.28 V	1.1%
Vmpp	37.7 V	37.56 V	0.4%
Isc	18.35 A	18.29 A	0.3%
Impp	17.11 A	17.17 A	0.4%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Seraphim SRP-645-BMC-BG

645 W

PERC

84Good match

Parameter	Original	Replacement	Deviation
Voc	44.8 V	45.28 V	1.1%
Vmpp	37.7 V	37.56 V	0.4%
Isc	18.35 A	18.29 A	0.3%
Impp	17.11 A	17.17 A	0.4%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

RECOM RCM-655-8BMM

655 W

PERC

83Good match

Parameter	Original	Replacement	Deviation
Voc	44.8 V	45.21 V	0.9%
Vmpp	37.7 V	38.11 V	1.1%
Isc	18.35 A	18.44 A	0.5%
Impp	17.11 A	17.19 A	0.5%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Yingli Solar YL650DF66 f/2

650 W

PERC

83Good match

Parameter	Original	Replacement	Deviation
Voc	44.8 V	45.3 V	1.1%
Vmpp	37.7 V	37.5 V	0.5%
Isc	18.35 A	18.36 A	0.1%
Impp	17.11 A	17.34 A	1.3%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Seraphim SRP-650-BMC-BG

650 W

PERC

80Good match

Parameter	Original	Replacement	Deviation
Voc	44.8 V	45.48 V	1.5%
Vmpp	37.7 V	37.76 V	0.2%
Isc	18.35 A	18.34 A	0.1%
Impp	17.11 A	17.21 A	0.6%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Seraphim SRP-650-BMC-HV

650 W

PERC

80Good match

Parameter	Original	Replacement	Deviation
Voc	44.8 V	45.48 V	1.5%
Vmpp	37.7 V	37.76 V	0.2%
Isc	18.35 A	18.34 A	0.1%
Impp	17.11 A	17.21 A	0.6%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

Yingli Solar YL655DF66 f/2

655 W

PERC

79Acceptable

Parameter	Original	Replacement	Deviation
Voc	44.8 V	45.5 V	1.6%
Vmpp	37.7 V	37.7 V	0.0%
Isc	18.35 A	18.42 A	0.4%
Impp	17.11 A	17.38 A	1.6%
TcVoc	-0.25 %/°C	-0.25 %/°C	±0.000 %/°C
TcPmax	-0.34 %/°C	-0.34 %/°C	±0.000 %/°C

String Compatibility Calculator

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Panel Matcher

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How the Algorithm Works

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Original Panel Specs

Voc

44.8 V

Vmpp

37.7 V

Isc

18.35 A

Impp

17.11 A

TcVoc

-0.25 %/°C

TcPmax

-0.34 %/°C

Pmax

645 W

Cells

132

Bifaciality

70%

Length

2384 mm

Width

1303 mm

Thickness

35 mm

Weight

34.4 kg

The RECOM RCM-645-8BMM 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

Power	Voc	Isc
650 W	45 V	18.38 A
655 W	45.21 V	18.44 A
660 W	45.39 V	18.47 A
665 W	45.59 V	18.51 A

Frequently Asked Questions

What specs must match when replacing the RECOM RCM-645-8BMM?

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 -0.25%/°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 RECOM RCM-645-8BMM?

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 RECOM RCM-645-8BMM.