When you are setting up a solar system, safety is the one thing you cannot compromise on. One important component that ensures this is the solar fuse. Selecting the correct fuse size is essential to protect your solar panel system.
In this article, we’ll explain why proper fuse sizing matters, and how you can easily calculate.
What Is Fuse?
A fuse is a protective device placed in the electrical circuit. Its main job is to break the circuit if the current flowing through it exceeds a safe limit.
Solar fuses are commonly installed:
-
Between solar panels and charge controllers
-
Between charge controllers and batteries
-
Between batteries and inverters
Why Solar Fuse Sizing Is Important?
Choosing the correct fuse size is important because of
-
They protect your solar system from current surges.
-
The system operates efficiently.
-
You comply with National Electrical Code standards.
-
They prevent overheating and fire hazards.
How to Calculate Solar Fuse Size?
The general formula to determine the correct fuse size is:
Fuse Rating (A) = (Solar Panel Current × 1.25 × 1.25)
For example, if your solar panel has an Isc = 9A,then Fuse Size = 9 × 1.56 = 14.04A
Recommended Fuse Sizes for Common Solar Setups
|
System
Voltage |
Solar
Panel Power |
Typical
Isc (Current) |
Recommended
Fuse Size |
Fuse
Type (DC) |
|
12V
/ 100W panel |
5.5A
– 6A |
10A
– 15A |
15A |
15A
DC fuse |
|
24V
/ 200W panel |
8A
– 9A |
15A
– 20A |
20A |
20A
DC fuse |
|
24V
/ 300W panel |
12A
– 13A |
20A
– 25A |
25A |
25A
DC fuse |
|
48V
/ 500W system |
10A
– 11A |
20A
– 25A |
25A |
25A
DC fuse |
|
48V
/ 1000W system |
20A
– 22A |
30A
– 35A |
35A |
35A
DC fuse |
|
48V
/ 2000W system |
40A
– 42A |
50A
– 60A |
60A |
60A
DC fuse |
-Electronicsinfos.png)
.png)
0 Comments
please do not insert spam links