Beginner Question: I have four 100 watt panels going to a 30 Amp MPPT type controller, any suggestions as to which of these is the correct size amps?

Short answer is probably the 400v 30 amp breaker to match your mppt controller. Long answer is it can depend on how your solar panels are wired, in series or parallel. In series the voltages add up (most 100w are around 20v or less) and the amps stay the same. In parallel it’s the opposite. Since your four panels is under the amp and voltage limits whichever way they are connected and the mppt charge controller maxes out at 30 amps, the 400v 30A breaker will work just fine.

Hi i just recieved this item, what is the internal thickness of the copper wire in mm? or equivalent gauge in awg?

This disconnect is rated at "30 Amps", which requires the wire to be 10awg to carry that amount of current. Wire size: 10 Gauge / 2.588 mm

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DIHOOL Solar Panel Disconnect Switch, Non Polarized DC Circuit Breaker, 30 Amp, 2 Pole, 12V-400V, AC Disconnect Box Outdoor, Battery Cutoff Isolator

DIHOOL Solar Panel Disconnect Switch, Non Polarized DC Circuit Breaker, 30 Amp, 2 Pole, 12V-400V, AC Disconnect Box Outdoor, Battery Cutoff Isolator

Product ID: 460654951

Details

Brand
DIHOOL
Circuit Breaker Type
Standard
Current Rating
30 A
Mounting Type
Surface Mount
Product Dimensions
4.7"D x 2.16"W

⚡30 Amp high-capacity current rating

💧IP65 waterproof for outdoor durability

🔄Non-polarized 2-pole for flexible wiring

RM238

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Description

🔋 Cut the cord, not the power — stay connected with confidence!

PLUG PLAY READY - Includes solar connectors and 30cm extension cable for fast, hassle-free setup.
POWERFUL PRECISE - Handles up to 30A and 400V, perfect for robust solar and EV setups.
WEATHERPROOF RUGGED - IP65-rated enclosure ensures reliable outdoor performance rain or shine.
EFFORTLESS INSTALLATION - Non-polarized design eliminates wiring guesswork and reduces errors.
SAFE SMART PROTECTION - Built-in arc suppression, overload, and short circuit safeguards keep your system secure.

The DIHOOL Solar Panel Disconnect Switch is a versatile, IP65 waterproof 2-pole circuit breaker rated for 30A and 12V-400V DC/AC systems. Designed for outdoor solar, EV charging, and battery isolation, it features a non-polarized design for easy installation, built-in arc suppression, and multiple safety protections, making it an essential upgrade for any modern renewable energy or power management setup.

Specifications

ASIN	B0B2LGDRNN
Best Sellers Rank	#16,611 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #8 in Miniature Circuit Breakers
Brand Name	DIHOOL
Circuit Breaker Type	Standard
Current Rating	30 A
Customer Reviews	4.4 4.4 out of 5 stars (508)
Included Components	2 pcs Solar Terminals
Item Dimensions D x W x H	4.7"D x 2.16"W x 3.56"H
Manufacturer	DIHOOL ELECTRIC
Model	DZ47X-30A-IP65-MC4
Mounting Type	Surface Mount
Number of Poles	2
Part Number	DZ47X-30A-IP65-MC4
Voltage	400 volts

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RM238

Duties & taxes included

In stock

Sold byAmazon MalaysiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Malaysia.

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TrustScore 4.5 | 7,300+ reviews

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