645 W ABC solar panel with 132 cells. Voc 49.6 V · Isc 16.55 A · TcVoc -0.22%/°C.
Select the panel you want to replace
Voc
49.6 V
Vmpp
40.59 V
Isc
16.55 A
Impp
15.89 A
TcVoc
-0.22 %/°C
TcPmax
-0.26 %/°C
Pmax
645 W
Cells
132
Bifaciality
75%
The Aiko Solar AIKO-A645-GRH66Dw 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.
| Model | Power | Voc | Isc |
|---|---|---|---|
| AIKO-A650-GRH66Dw | 650 W | 49.7 V | 16.64 A |
The most critical specs to match are: cell count (must be exactly 132), Voc close to 49.6 V (within ±5%), and temperature coefficient TcVoc close to -0.22%/°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 Aiko Solar AIKO-A645-GRH66Dw.