Solar Stack
Solar Stack
How it worksGuidesAdd Equipment
Sign in
Solar Stack

Free solar panel & inverter compatibility checker. Verify your PV string configuration is safe before installation.

Tools

  • Calculator
  • Panel Matcher
  • Inverter Finder
  • Inverter Compare
  • Panel Replacement
  • Cable sizing

Resources

  • Guides
  • How it works
  • Standards & Compliance
  • Data API
  • Replacement methodology
  • Add Equipment
  • Feedback

Legal

  • About
  • Privacy Policy
  • Terms of Service
  • Cookie Policy

© 2026 Solar Stack

All replacements

Find replacement for Risen RSM156-9-645BNDG

645 W TOPCon solar panel with 156 cells. Voc 56.79 V · Isc 14.44 A · TcVoc -0.25%/°C.

Select the panel you want to replace

Show only panels with matching cell technology

Compatible Replacements

73 panels found · 4266 panels excluded

Seraphim SRP-640-BTZ-BG

640 W

TOPCon
95Exact match
ParameterOriginalReplacementDeviation
Voc56.79 V56.84 V0.1%
Vmpp47.47 V47.49 V0.0%
Isc14.44 A14.19 A1.7%
Impp13.6 A13.48 A0.9%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
Risen RSM156-9-640BNDG

640 W

TOPCon
93Good match
ParameterOriginalReplacementDeviation
Voc56.79 V56.6 V0.3%
Vmpp47.47 V47.31 V0.3%
Isc14.44 A14.38 A0.4%
Impp13.6 A13.54 A0.4%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
Seraphim SRP-635-BTZ-BG

635 W

TOPCon
90Good match
ParameterOriginalReplacementDeviation
Voc56.79 V56.64 V0.3%
Vmpp47.47 V47.31 V0.3%
Isc14.44 A14.13 A2.1%
Impp13.6 A13.43 A1.2%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
Seraphim SRP-645-BTZ-BG

645 W

TOPCon
90Good match
ParameterOriginalReplacementDeviation
Voc56.79 V57.04 V0.4%
Vmpp47.47 V47.68 V0.4%
Isc14.44 A14.25 A1.3%
Impp13.6 A13.53 A0.5%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
DAH Solar DHN-78X16/DG-640W

640 W

TOPCon
88Good match
ParameterOriginalReplacementDeviation
Voc56.79 V56.4 V0.7%
Vmpp47.47 V47.6 V0.3%
Isc14.44 A14.32 A0.8%
Impp13.6 A13.45 A1.1%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
Risen RSM156-9-635BNDG

635 W

TOPCon
86Good match
ParameterOriginalReplacementDeviation
Voc56.79 V56.4 V0.7%
Vmpp47.47 V47.15 V0.7%
Isc14.44 A14.33 A0.8%
Impp13.6 A13.48 A0.9%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
Seraphim SRP-650-BTZ-BG

650 W

TOPCon
85Good match
ParameterOriginalReplacementDeviation
Voc56.79 V57.24 V0.8%
Vmpp47.47 V47.87 V0.8%
Isc14.44 A14.31 A0.9%
Impp13.6 A13.58 A0.1%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
JinkoSolar JKM625N-78HL4-BDV

625 W

TOPCon
85Good match
ParameterOriginalReplacementDeviation
Voc56.79 V56.95 V0.3%
Vmpp47.47 V47.54 V0.1%
Isc14.44 A13.8 A4.4%
Impp13.6 A13.15 A3.3%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
DAS Solar DAS-DH156NA-650

650 W

TOPCon
84Good match
ParameterOriginalReplacementDeviation
Voc56.79 V56.55 V0.4%
Vmpp47.47 V46.97 V1.1%
Isc14.44 A14.59 A1.0%
Impp13.6 A13.84 A1.8%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.3 %/°C±0.010 %/°C
Perlight Solar PLM-625DH8N-156

625 W

TOPCon
83Good match
ParameterOriginalReplacementDeviation
Voc56.79 V56.8 V0.0%
Vmpp47.47 V47.71 V0.5%
Isc14.44 A13.74 A4.8%
Impp13.6 A13.1 A3.7%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.3 %/°C±0.010 %/°C
Seraphim SRP-630-BTZ-BG

630 W

TOPCon
83Good match
ParameterOriginalReplacementDeviation
Voc56.79 V56.44 V0.6%
Vmpp47.47 V47.13 V0.7%
Isc14.44 A14.07 A2.6%
Impp13.6 A13.37 A1.7%
TcVoc-0.25 %/°C-0.25 %/°C±0.000 %/°C
TcPmax-0.29 %/°C-0.29 %/°C±0.000 %/°C
DAH Solar DHN-78X16/DG-635W

635 W

TOPCon
83Good match
ParameterOriginalReplacementDeviation
Voc56.79 V56.2 V1.0%
Vmpp47.47 V47.4 V0.1%
Isc14.44 A14.26 A1.2%
Impp13.6 A13.4 A1.5%
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

56.79 V

Vmpp

47.47 V

Isc

14.44 A

Impp

13.6 A

TcVoc

-0.25 %/°C

TcPmax

-0.29 %/°C

Pmax

645 W

Cells

156

Bifaciality

80%

Length

2465 mm

Width

1134 mm

Thickness

30 mm

Weight

33.5 kg

The Risen RSM156-9-645BNDG 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
RSM156-9-620BNDG620 W55.83 V14.16 A
RSM156-9-625BNDG625 W56.01 V14.22 A
RSM156-9-630BNDG630 W56.2 V14.28 A
RSM156-9-635BNDG635 W56.4 V14.33 A
RSM156-9-640BNDG640 W56.6 V14.38 A

Frequently Asked Questions

What specs must match when replacing the Risen RSM156-9-645BNDG?

The most critical specs to match are: cell count (must be exactly 156), Voc close to 56.79 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 Risen RSM156-9-645BNDG?

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 Risen RSM156-9-645BNDG.