280 W ABC solar panel with 64 cells. Voc 24.11 V · Isc 14.72 A · TcVoc -0.22%/°C.
Select the panel you want to replace
6 panels found · 3704 panels excluded
| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 24.11 V | 23.89 V | 0.9% |
| Vmpp | 20.49 V | 20.36 V | 0.6% |
| Isc | 14.72 A | 14.65 A | 0.5% |
| Impp | 13.67 A | 13.51 A | 1.2% |
| TcVoc | -0.22 %/°C | -0.22 %/°C | ±0.000 %/°C |
| TcPmax | -0.26 %/°C | -0.26 %/°C | ±0.000 %/°C |
| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 24.11 V | 23.67 V | 1.8% |
| Vmpp | 20.49 V | 20.23 V | 1.3% |
| Isc | 14.72 A | 14.58 A | 1.0% |
| Impp | 13.67 A | 13.35 A | 2.3% |
| TcVoc | -0.22 %/°C | -0.22 %/°C | ±0.000 %/°C |
| TcPmax | -0.26 %/°C | -0.26 %/°C | ±0.000 %/°C |
270 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 24.11 V | 24.04 V | 0.3% |
| Vmpp | 20.49 V | 20.24 V | 1.2% |
| Isc | 14.72 A | 14.12 A | 4.1% |
| Impp | 13.67 A | 13.36 A | 2.3% |
| TcVoc | -0.22 %/°C | -0.25 %/°C | ±0.030 %/°C |
| TcPmax | -0.26 %/°C | -0.29 %/°C | ±0.030 %/°C |
300 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 24.11 V | 24.01 V | 0.4% |
| Vmpp | 20.49 V | 20.37 V | 0.6% |
| Isc | 14.72 A | 15.72 A | 6.8% |
| Impp | 13.67 A | 14.76 A | 8.0% |
| TcVoc | -0.22 %/°C | -0.25 %/°C | ±0.030 %/°C |
| TcPmax | -0.26 %/°C | -0.29 %/°C | ±0.030 %/°C |
265 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 24.11 V | 23.78 V | 1.4% |
| Vmpp | 20.49 V | 19.98 V | 2.5% |
| Isc | 14.72 A | 14.04 A | 4.6% |
| Impp | 13.67 A | 13.28 A | 2.9% |
| TcVoc | -0.22 %/°C | -0.25 %/°C | ±0.030 %/°C |
| TcPmax | -0.26 %/°C | -0.29 %/°C | ±0.030 %/°C |
260 W
TOPCon| Parameter | Original | Replacement | Deviation |
|---|---|---|---|
| Voc | 24.11 V | 23.52 V | 2.4% |
| Vmpp | 20.49 V | 19.72 V | 3.8% |
| Isc | 14.72 A | 13.95 A | 5.2% |
| Impp | 13.67 A | 13.19 A | 3.5% |
| TcVoc | -0.22 %/°C | -0.25 %/°C | ±0.030 %/°C |
| TcPmax | -0.26 %/°C | -0.29 %/°C | ±0.030 %/°C |
String Compatibility Calculator
Verify the replacement panel works with your inverter
Panel Matcher
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How the Algorithm Works
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Voc
24.11 V
Vmpp
20.49 V
Isc
14.72 A
Impp
13.67 A
TcVoc
-0.22 %/°C
TcPmax
-0.26 %/°C
Pmax
280 W
Cells
64
Bifaciality
80%
Length
1560 mm
Width
770 mm
Thickness
35 mm
Weight
14.3 kg
The Heckert Solar ZEUS 1.2 64-280 FullBlack is a 280 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 |
|---|---|---|---|
| ZEUS 1.2 64-270 FullBlack | 270 W | 23.67 V | 14.58 A |
| ZEUS 1.2 64-275 FullBlack | 275 W | 23.89 V | 14.65 A |
The most critical specs to match are: cell count (must be exactly 64), Voc close to 24.11 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 Heckert Solar ZEUS 1.2 64-280 FullBlack.