650 W PERC solar panel with 132 cells. Voc 45.58 V · Isc 18.16 A · TcVoc -0.28%/°C.
Select the panel you want to replace
Panel not in the catalogue?
20 of the 4,444 panels in the catalogue can replace RECOM RCM-650-8MM. Before you buy, check your pick in the string calculator with your inverter.
CloseNoticeableLarge differenceTap or click a difference to see what it means for your string.
Small differences within tolerance — safe once verified in the calculator with your inverter.
Match 82–91 % · 4 models
Noticeable differences — the string voltage and current need a careful check.
Match 60–77 % · 15 models
Large differences — a real risk of a mismatched string; prefer a closer panel.
Match 53 % · 1 model
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
Voc
45.58 V
Vmpp
37.61 V
Isc
18.16 A
Impp
17.28 A
TcVoc
-0.28 %/°C
TcPmax
-0.36 %/°C
Pmax
650 W
Cells
132
Length
2384 mm
Width
1303 mm
Thickness
35 mm
Weight
34 kg
The RECOM RCM-650-8MM is a 650 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 |
|---|---|---|---|
| RCM-655-8MM | 655 W | 45.78 V | 18.21 A |
| RCM-660-8MM | 660 W | 45.98 V | 18.26 A |
| RCM-665-8MM | 665 W | 46.18 V | 18.31 A |
The most critical specs to match are: cell count (must be exactly 132), Voc close to 45.58 V (within ±5%), and temperature coefficient TcVoc close to -0.28%/°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.
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.
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-650-8MM.