505 W TOPCon solar panel with 120 cells. Voc 44.4 V · Isc 14.22 A · TcVoc -0.25%/°C.
Select the panel you want to replace
Panel not in the catalogue?
336 of the 4,444 panels in the catalogue can replace München Solar MSMD505M10NR-120BG. Before you buy, check your pick in the string calculator with your inverter.
Close or harmlessNoticeableLarge differenceTap or click a difference to see what it means for your string.
Near-identical electrics — a drop-in swap for the same string.
Match 95–99 % · 75 models
Small differences within tolerance — safe once verified in the calculator with your inverter.
Match 80–94 % · 77 models
Noticeable differences — the string voltage and current need a careful check.
Match 62–79 % · 143 models
Large differences — a real risk of a mismatched string; prefer a closer panel.
Match 36–59 % · 41 models
String Compatibility Calculator
Verify the replacement panel works with your inverter
Panel Matcher
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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
Voc
44.4 V
Vmpp
37.1 V
Isc
14.22 A
Impp
13.61 A
TcVoc
-0.25 %/°C
TcPmax
-0.29 %/°C
Pmax
505 W
Cells
120
Bifaciality
66%
Length
1996 mm
Width
1134 mm
Thickness
30 mm
Weight
28.5 kg
The München Solar MSMD505M10NR-120BG is a 505 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.
| Model | Power | Voc | Isc |
|---|---|---|---|
| MSMD500M10NR-120BG | 500 W | 44.2 V | 14.14 A |
| MSMD510M10NR-120BG | 510 W | 44.6 V | 14.29 A |
Match the voltage, not the cell count or the wattage. The replacement's open-circuit voltage should be no more than 2 % above 44.4 V and its working voltage within 5 % of the original; its working current should not be more than 3 % lower, because the weakest panel in a string sets the current for all of them. A temperature coefficient closer to zero than -0.25 %/°C is fine — it adds less voltage in frost. The finder above screens the whole catalogue by these rules.
Yes, if its voltage matches. A higher-wattage panel of the same voltage simply has more current, and a string only carries as much as its weakest panel gives, so the extra goes unused at no risk to the string. Two things to check: its higher short-circuit current against the inverter's rating, and its frame, which is usually larger. The finder shows both; verify the pick in the String Compatibility Calculator with your inverter before installing.
If its Voc is higher, the string comes closer to the inverter's maximum voltage on frosty mornings, when voltage climbs by the TcVoc coefficient; if its Vmpp is lower, the string can drop out of the inverter's working range (MPPT) on hot days. The finder scores each difference only in the direction that hurts — a lower Voc or a flatter coefficient costs nothing — and ranks candidates by how closely they match the München Solar MSMD505M10NR-120BG.