No I always call the customer service.

Have three strings. I need a 20 amp fuse for one of them, can I replace one of the 15 amp fuses with a 20 amp and keep the remaining fuses 15 amps?

For your case, please ensure the three strings' total voltage are close or the same to each other.

My panels have 8.9Amp.Should that be protected by 10Amp fuse?

This does not matter. 10Amp and 15 Amp are both can be used. We offered 15Amp.

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PV Combiner Box, 4 String Metal Solar Combiner Box with 15A Rated Current Fuse, Surge Protective Device and 50A Air Circuit Breaker for On/Off Grid Solar Panel System, Pre-Wired Cable

PV Combiner Box, 4 String Metal Solar Combiner Box with 15A Rated Current Fuse, Surge Protective Device and 50A Air Circuit Breaker for On/Off Grid Solar Panel System, Pre-Wired Cable

Product ID: 408494269

⚡50A Air Circuit Breaker

🔒IP65 Waterproof Metal Lockable Box

🛡️15A Rated Fuse & Surge Protection

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Rp4587788

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Sold byAmazon IndonesiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Power up your solar game with unmatched safety and style!

ROBUST METAL HOUSING - Durable IP65-rated steel enclosure built to withstand harsh outdoor conditions and ensure long-term reliability.
EXPANDABLE SOLAR CAPACITY - Supports up to 4 solar strings with individual fuse protection, allowing seamless system upgrades as your energy needs grow.
ADVANCED SAFETY MECHANISMS - Integrated 15A fuses, 50A air circuit breaker, and surge protective device for comprehensive overload, short circuit, and lightning protection.
OPTIMIZED SYSTEM EFFICIENCY - Reduces cable length and improves power output by centralizing connections, making your solar setup safer and more efficient.
PRE WIRED FOR EASY INSTALLATION - Comes with high-quality, solar-grade pre-wired cables and ground wire connector for quick, hassle-free setup.

The PowGrow PV Combiner Box is a heavy-duty, IP65-rated metal enclosure designed for on/off-grid solar systems. Featuring 4 string inputs with 15A fuses, a 50A air circuit breaker, and a surge protective device, it ensures maximum safety and reliability. Pre-wired with premium solar cables and equipped with a lockable, weatherproof design, this combiner box simplifies installation and future expansion while optimizing your solar power output.

Specifications

ASIN	B09BT91PHN
Best Sellers Rank	#232,743 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #1,158 in Solar & Wind Power Parts & Accessories
Customer Reviews	4.6 4.6 out of 5 stars (227)
Item Weight	9.24 pounds
Manufacturer	PowGrow
Package Dimensions	13.98 x 13.23 x 6.54 inches

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