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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🔋 Power up your solar game with ultimate protection & efficiency!

ROBUST METAL ARMOR - Durable IP65-rated metal box with lock ensures outdoor resilience and security.
MAINTENANCE MADE EASY - Quick disconnect and clear fuse indicators minimize downtime and maximize uptime.
OPTIMIZED SOLAR OUTPUT - Combines up to 4 strings, reducing cable clutter and boosting system efficiency.
PLUG PLAY PRE WIRED SETUP - Comes with high-quality pre-wired solar cables and built-in grounding for hassle-free installation.
SURGE SHORT CIRCUIT SHIELD - 50A air circuit breaker plus lightning protection keeps your system safe and stable.

The PowGrow PV Combiner Box is a heavy-duty, IP65-rated metal enclosure designed for on/off-grid solar systems. It features a 50A air circuit breaker for surge and short-circuit protection, four 15A fuses for overload safety, and pre-wired high-quality solar cables with grounding. This combiner box simplifies solar array connections, enhances system reliability, and ensures easy maintenance, making it an essential upgrade for professional solar installations.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.