450 W PERC solar panel with 144 cells. Voc 49.05 V · Isc 11.37 A · TcVoc -0.27%/°C.
Select the panel you want to replace
Panel not in the catalogue?
36 of the 4,444 panels in the catalogue can replace Astronergy CHSM72M-HC-450. 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 80–89 % · 4 models
Noticeable differences — the string voltage and current need a careful check.
Match 60–77 % · 25 models
Large differences — a real risk of a mismatched string; prefer a closer panel.
Match 34–57 % · 7 models
String Compatibility Calculator
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Panel Matcher
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How the Algorithm Works
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Voc
49.05 V
Vmpp
41.32 V
Isc
11.37 A
Impp
10.89 A
TcVoc
-0.27 %/°C
TcPmax
-0.35 %/°C
Pmax
450 W
Cells
144
Length
2094 mm
Width
1038 mm
Thickness
35 mm
Weight
23 kg
The Astronergy CHSM72M-HC-450 is a 450 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 |
|---|---|---|---|
| CHSM72M-HC-445 | 445 W | 48.8 V | 11.3 A |
| CHSM72M-HC-455 | 455 W | 49.35 V | 11.44 A |
The most critical specs to match are: cell count (must be exactly 144), Voc close to 49.05 V (within ±5%), and temperature coefficient TcVoc close to -0.27%/°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 Astronergy CHSM72M-HC-450.