660 W HPBC solar panel with 144 cells. Voc 54.42 V · Isc 15.3 A · TcVoc -0.2%/°C.
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Panel not in the catalogue?
57 of the 4,444 panels in the catalogue can replace LONGi LR7-72HVDA-660M. 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.
Near-identical electrics — a drop-in swap for the same string.
Match 95–100 % · 18 models
Small differences within tolerance — safe once verified in the calculator with your inverter.
Match 80–94 % · 26 models
Noticeable differences — the string voltage and current need a careful check.
Match 61–79 % · 12 models
Large differences — a real risk of a mismatched string; prefer a closer panel.
Match 57 % · 1 model
String Compatibility Calculator
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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
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Voc
54.42 V
Vmpp
45.07 V
Isc
15.3 A
Impp
14.65 A
TcVoc
-0.2 %/°C
TcPmax
-0.26 %/°C
Pmax
660 W
Cells
144
Bifaciality
70%
Length
2382 mm
Width
1134 mm
Thickness
30 mm
Weight
32.5 kg
The LONGi LR7-72HVDA-660M is a 660 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 |
|---|---|---|---|
| LR7-72HVDA-640M | 640 W | 54.02 V | 14.98 A |
| LR7-72HVDA-645M | 645 W | 54.12 V | 15.06 A |
| LR7-72HVDA-650M | 650 W | 54.22 V | 15.14 A |
| LR7-72HVDA-655M | 655 W | 54.32 V | 15.22 A |
| LR7-72HVDA-665M | 665 W | 54.52 V | 15.38 A |
| LR7-72HVDA-670M | 670 W | 54.62 V | 15.46 A |
The most critical specs to match are: cell count (must be exactly 144), Voc close to 54.42 V (within ±5%), and temperature coefficient TcVoc close to -0.2%/°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 LONGi LR7-72HVDA-660M.