Engineering Support When You Need It

Not sure which breaker fits your system? Have a question about coordination or protection settings? Our engineers are available to review your system parameters and provide clear, practical recommendations — usually within the same day.

We don’t hide behind sales teams. When you contact us, you speak directly to the people who design and test our products.

System protection scheme review

Product selection & coordination advice

Fault analysis support

Installation guidance

Try Before You Commit

We understand that switching to a new supplier requires confidence. That’s why we offer sample orders starting from 1 piece — so you can test our products in your own system before placing larger orders.

Samples ship within 3-5 business days. Our team will follow up to ensure everything meets your expectations.

Built to Your Specification

Standard products don’t fit every project. Different regions have different requirements. Different installers have different preferences. We get it.

We offer custom configurations including:

Private labeling — Your logo on products and packaging

Custom current/voltage ratings — Beyond standard ranges where possible

Special cable lengths or terminal configurations — For unique installation needs

Custom combiner box layouts — Internal component arrangement to your spec

Packaging — Custom cartons, labeling, or kit assembly

Minimum quantities and lead times vary by project. Contact us to discuss your specific requirements — we’ll let you know what’s feasible.

For sample orders: we ship within 3-5 business days. For production orders: typically 5-10 business days, depending on quantity and configuration. Express shipping (DHL/FedEx) takes 3-5 days for delivery. Sea freight takes 20-40 days depending on destination.

For standard products, our MOQ is 1 piece for sample orders. This allows you to test and qualify our products before committing to larger quantities. For production orders, MOQ varies by model — typically 50-100 pieces. Contact our sales team for specific model MOQ details.

Absolutely not. AC breakers lack the magnetic blow-out coils and arc chambers required to extinguish DC arcs. DC arcs have no natural zero-crossing and will persist, potentially causing contact welding, equipment failure, or fire. Only use breakers clearly marked with DC voltage ratings.

MCB (Miniature Circuit Breaker) covers 1A–63A with fixed trip settings — ideal for string protection. MCCB (Moulded Case Circuit Breaker) covers 63A–1600A+ with adjustable trip settings — suitable for main feeders, inverter inputs, and battery strings. See our detailed comparison guide for more information.

Three key parameters: voltage, current, and breaking capacity. The breaker voltage rating must be ≥ your system’s maximum voltage (including low-temperature rise). Current rating should be ≥ Isc × 1.25 (continuous load factor). Breaking capacity must cover the maximum possible fault current at the installation point. For a detailed guide, see our blog or contact our engineers.

We design our products to meet IEC/EN 60947, UL 489, and GB/T 14048 standards. Our components use UL94 V-0 rated materials and are built to IP66 and IK10 specifications.

Our manufacturing and headquarters are based in wenzhou. We currently do not have overseas offices, but we work directly with partners and distributors in multiple countries. Our team is accustomed to working across time zones and responds to inquiries promptly.