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FAQ

The enclosure of charge controller:

If the controllers are used indoors or outdoors but with box, user can choose IP30 solar controller.  For outdoor application, sometimes steam condenses to water when it touches a cold surface. And the water can come into controllers along with the wire. So it’s better to use high IP rating controller in humid area.

What is an IP rating?

IP (or "Ingress Protection") ratings are used to define levels of sealing effectiveness of electrical enclosures against intrusion from foreign bodies (tools, dirt etc) and moisture. The numbers that follow IP each have a specific meaning. The first indicates the degree of protection (of people) from moving parts, as well as the protection of enclosed equipment from foreign bodies. The second defines the protection level that the enclosure enjoys from various forms of moisture (drips, sprays, submersion etc).

First Digit Solid particle protection

The first digit indicates the level of protection that the enclosure provides against access to hazardous parts (e.g., electrical conductors, moving parts) and the ingress of solid foreign objects

Level

Object size protected against

Effective against

0

No protection against contact and ingress of objects

1

>50 mm

Any large surface of the body, such as the back of a hand, but no protection against deliberate contact with a body part

2

>12.5 mm

Fingers or similar objects

3

>2.5 mm

Tools, thick wires, etc.

4

>1 mm

Most wires, screws, etc.

5

Dust protected

Ingress of dust is not entirely prevented, but it must not enter in sufficient quantity to interfere with the satisfactory operation of the equipment; complete protection against contact

6

Dust tight

No ingress of dust; complete protection against contact

Second  digit (Liquid ingress protection)

Protection of the equipment inside the enclosure against harmful ingress of water

Level

Protected against

Testing for

Details

0

Not protected

1

Dripping water

Dripping water (vertically falling drops) shall have no harmful effect.

Test duration: 10 minutes

Water equivalent to 1mm rainfall per minute

2

Dripping water when tilted up to 15°

Vertically dripping water shall have no harmful effect when the enclosure is tilted at an angle up to 15° from its normal position.

Test duration: 10 minutes

Water equivalent to 3mm rainfall per minute

3

Spraying water

Water falling as a spray at any angle up to 60° from the vertical shall have no harmful effect.

Test duration: 5 minutes

Water volume: 0.7 litres per minute
Pressure: 80–100 kPa

4

Splashing water

Water splashing against the enclosure from any direction shall have no harmful effect.

Test duration: 5 minutes

Water volume: 10 litres per minute
Pressure: 80–100 kPa

5

Water jets

Water projected by a nozzle (6.3mm) against enclosure from any direction shall have no harmful effects.

Test duration: at least 3 minutes

Water volume: 12.5 litres per minute
Pressure: 30 kPa at distance of 3m

6

Powerful water jets

Water projected in powerful jets (12.5mm nozzle) against the enclosure from any direction shall have no harmful effects.

Test duration: at least 3 minutes

Water volume: 100 litres per minute
Pressure: 100 kPa at distance of 3m

7

Immersion up to 1 m

Ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion).

Test duration: 30 minutes

Immersion at depth of 1m

8

Immersion beyond 1 m

The equipment is suitable for continuous immersion in water under conditions which shall be specified by the manufacturer. Normally, this will mean that the equipment is hermetically sealed. However, with certain types of equipment, it can mean that water can enter but only in such a manner that it produces no harmful effects.

Test duration: continuous immersion in water

Depth specified by manufacturer

 

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