635 W HJT solar panel with 120 cells. Voc 45.48 V · Isc 17.43 A · TcVoc -0.24%/°C.
Select the panel you want to replace
Panel not in the catalogue?
16 of the 4,444 panels in the catalogue can replace Phono Solar PS635M13GFH-20/USH. 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.
Small differences within tolerance — safe once verified in the calculator with your inverter.
Match 85–93 % · 4 models
Noticeable differences — the string voltage and current need a careful check.
Match 65 % · 1 model
Large differences — a real risk of a mismatched string; prefer a closer panel.
Match 25–55 % · 11 models
String Compatibility Calculator
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Panel Matcher
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How the Algorithm Works
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Voc
45.48 V
Vmpp
38.19 V
Isc
17.43 A
Impp
16.63 A
TcVoc
-0.24 %/°C
TcPmax
-0.24 %/°C
Pmax
635 W
Cells
120
Bifaciality
85%
Length
2172 mm
Width
1303 mm
Thickness
35 mm
Weight
35.3 kg
The Phono Solar PS635M13GFH-20/USH is a 635 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 |
|---|---|---|---|
| PS625M13GFH-20/USH | 625 W | 45.13 V | 17.31 A |
| PS630M13GFH-20/USH | 630 W | 45.3 V | 17.37 A |
| PS640M13GFH-20/USH | 640 W | 45.65 V | 17.49 A |
| PS645M13GFH-20/USH | 645 W | 45.82 V | 17.55 A |
The most critical specs to match are: cell count (must be exactly 120), Voc close to 45.48 V (within ±5%), and temperature coefficient TcVoc close to -0.24%/°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 Phono Solar PS635M13GFH-20/USH.