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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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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6 String Metal Solar PV Combiner Box with 15A Rated Current Fuse | Surge Protective Device and 63A Air Circuit Breaker for On/Off Grid Solar Panel System,Pre-Wired Cable,Metal Box

Product ID: 367008486

⚡63A air circuit breaker for robust short-circuit protection

🔋6 string inputs for max solar array integration

🌧️IP65 waterproof metal enclosure for outdoor durability

VT83450

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Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power up your solar game with pro-grade protection and performance!

SMART SURGE PROTECTION - Integrated lightning arrester with clear green/red status indicator keeps your system safe and maintenance-ready.
ULTIMATE SAFETY SHIELD - Built-in 15A fuses and 63A air circuit breaker protect your system from overloads and short circuits.
WEATHERPROOF METAL ARMOR - Rugged IP65-rated metal box with lock ensures your investment withstands harsh outdoor conditions.
SEAMLESS SOLAR INTEGRATION - Combine up to 6 solar panel strings effortlessly for optimized energy flow.
PRE WIRED FOR INSTANT SETUP - Professional-grade pre-wired cables and ground wire connector save installation time and reduce errors.

The PowGrow 6 String Metal Solar PV Combiner Box is a heavy-duty, IP65-rated outdoor enclosure designed for on/off-grid solar systems. It features six 15A fuses for individual string overload protection, a 63A air circuit breaker for short-circuit safety, and an integrated surge protective device with status indicator. Pre-wired with high-quality solar cables and a metal mounting plate, this combiner box ensures reliable, safe, and efficient solar power management while simplifying installation and maintenance.

Specifications

ASIN	B09BTX2YQ5
Best Sellers Rank	#95,787 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #620 in Solar & Wind Power Parts & Accessories
Customer Reviews	4.6 4.6 out of 5 stars (230)
Item Weight	2.2 pounds
Manufacturer	PowGrow
Package Dimensions	15.59 x 14.06 x 6.73 inches

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