315 W HPBC solar panel with 108 cells. Voc 39.59 V · Isc 9.75 A · TcVoc -0.2%/°C.
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2 panels found · 3708 panels excluded
320 W
HPBC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 39.59 V | 39.95 V | 0.9% |
| Vmpp | 34.05 V | 34.36 V | 0.9% |
| Isc | 9.75 A | 9.82 A | 0.7% |
| Impp | 9.25 A | 9.31 A | 0.6% |
| TcVoc | -0.2 %/°C | -0.2 %/°C | ±0.000 %/°C |
| TcPmax | -0.26 %/°C | -0.26 %/°C | ±0.000 %/°C |
325 W
HPBC| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 39.59 V | 40.31 V | 1.8% |
| Vmpp | 34.05 V | 34.67 V | 1.8% |
| Isc | 9.75 A | 9.88 A | 1.3% |
| Impp | 9.25 A | 9.38 A | 1.4% |
| TcVoc | -0.2 %/°C | -0.2 %/°C | ±0.000 %/°C |
| TcPmax | -0.26 %/°C | -0.26 %/°C | ±0.000 %/°C |
String Compatibility Calculator
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Voc
39.59 V
Vmpp
34.05 V
Isc
9.75 A
Impp
9.25 A
TcVoc
-0.2 %/°C
TcPmax
-0.26 %/°C
Pmax
315 W
Cells
108
Bifaciality
70%
Length
1800 mm
Width
1134 mm
Thickness
30 mm
Weight
23.5 kg
The LONGi LGi7-54CHVD-315M is a 315 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 |
|---|---|---|---|
| LGi7-54CHVD-320M | 320 W | 39.95 V | 9.82 A |
| LGi7-54CHVD-325M | 325 W | 40.31 V | 9.88 A |
| LGi7-54CHVD-365M | 365 W | 39.66 V | 11.28 A |
| LGi7-54CHVD-370M | 370 W | 40.02 V | 11.33 A |
| LGi7-54CHVD-375M | 375 W | 40.38 V | 11.38 A |
| LGi7-54CHVD-415M | 415 W | 39.72 V | 12.8 A |
| LGi7-54CHVD-420M | 420 W | 40.08 V | 12.84 A |
| LGi7-54CHVD-425M | 425 W | 40.44 V | 12.88 A |
| LGi7-54CHVD-430M | 430 W | 39.74 V | 13.26 A |
| LGi7-54CHVD-435M | 435 W | 40.1 V | 13.29 A |
| LGi7-54CHVD-440M | 440 W | 40.46 V | 13.33 A |
The most critical specs to match are: cell count (must be exactly 108), Voc close to 39.59 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 LGi7-54CHVD-315M.