490 W IBC solar panel with 108 cells. Voc 40.75 V · Isc 15.18 A · TcVoc -0.2%/°C.
Select the panel you want to replace
Panel not in the catalogue?
131 of the 4,444 panels in the catalogue can replace Solar Fabrik S4-DG490-108BC-W. 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 96–100 % · 2 models
Small differences within tolerance — safe once verified in the calculator with your inverter.
Match 80–94 % · 44 models
Noticeable differences — the string voltage and current need a careful check.
Match 60–79 % · 48 models
Large differences — a real risk of a mismatched string; prefer a closer panel.
Match 33–58 % · 37 models
String Compatibility Calculator
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Panel Matcher
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How the Algorithm Works
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Voc
40.75 V
Vmpp
33.73 V
Isc
15.18 A
Impp
14.53 A
TcVoc
-0.2 %/°C
TcPmax
-0.26 %/°C
Pmax
490 W
Cells
108
Length
1800 mm
Width
1134 mm
Thickness
30 mm
Weight
25 kg
The Solar Fabrik S4-DG490-108BC-W is a 490 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 |
|---|---|---|---|
| S4-DG475-108BC-FB | 475 W | 40.42 V | 14.88 A |
| S4-DG475-108BC-B | 475 W | 40.42 V | 14.88 A |
| S4-DG480-108BC-FB | 480 W | 40.53 V | 14.98 A |
| S4-DG480-108BC-B | 480 W | 40.53 V | 14.98 A |
| S4-DG485-108BC-W | 485 W | 40.64 V | 15.08 A |
The most critical specs to match are: cell count (must be exactly 108), Voc close to 40.75 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 Solar Fabrik S4-DG490-108BC-W.