Frequently Asked Questions | Hongyu Supply Chain

Who is hysupplychain?

Hongyu Supply Chain Co.,Ltd. has over 9 years of experience in off-grid solar power solutions. We focus on providing efficient, safe, and expandable solar systems — including solar panels, LiFePO4 batteries, inverters, and full off-grid kits.

Where is hysupplychain based?

Hongyu is headquartered in Zhengzhou, China.

Can I customize the product logo?

Yes, we offer logo customization services.

Do you offer OEM/ODM services?

Yes, we offer OEM/ODM services to support your business.

What is your MOQ (minimum order quantity)?

MOQ: Standard size: 50pcs/size. Custom size: 100pcs/size. Please contact us for details.

How long is the delivery time?

Please tell us your shipping address and our experts will calculate the delivery time.

What is the product warranty period?

Our panels come with a 10–25 year warranty, depending on the model. All batteries, inverters, and controllers include a 3-5 year warranty.

Do you provide spare parts or after-sales service?

Yes, we provide spare parts and after-sales service.

How do I choose the right product model?

Please contact our experts and tell us your project requirements, we will provide you with a customized solution.

What payment methods do you accept?

Payment Terms: Bank T/T, Alibaba Pay

Which trade terms do you support?

Trading Terms: EWX, FOB, CFR, CIF, DDU

Can I become your distributor or agent?

Yes. We partner with solar installers, RV conversion companies, and energy solutions retailers. Please fill out the contact form to contact us.

What are the differences between batteries and lead-acid batteries?

Our LiFePO4 batteries last up to 10 years and support 4000–15000 charge cycles — equivalent to replacing three traditional lead-acid batteries. They are lighter, safer, and charge up to 80% in one hour.

Can I expand my battery capacity later?

Yes. For 12V batteries, Our system supports a maximum configuration of 4 in series and 4 in parallel (4S4P), allowing up to 16 batteries in total.

For 24V and 48V batteries, only parallel connections are supported, with a maximum of 10 batteries in parallel to maintain optimal performance and safety.

What’s the difference between off-grid and grid-tied systems?

Off-grid systems store energy in batteries for independent power supply, ideal for RVs, cabins, boats, and remote sites. Grid-tied systems feed excess power back into the utility grid.

How efficient are our solar panels?

The efficiency of our solar panels varies slightly depending on the specific model and environmental conditions. However, under standard test conditions, our panels typically achieve conversion efficiencies between 22% and 25%.Please note that real-world performance can be affected by factors such as sunlight intensity, temperature, and installation angle.

Are your solar panels compatible with other brands of controllers or batteries?

Yes. Our panels use standard MC4 connectors and are compatible with most MPPT and PWM controllers on the market.

Do your products include built-in protection?

Yes. All batteries are equipped with smart BMS (Battery Management System) that protects against overcharge, over-discharge, short circuit, and temperature extremes.

Can your system power home appliances?

Absolutely. Our solar kits and inverters can support lights, refrigerators, water pumps, heaters, and other small appliances, depending on total system wattage.

How do I choose the right system size?

Estimate your daily power usage (in kWh), then choose a system that produces at least 120% of that amount to ensure stable performance even in low sunlight days. You can contact our support team for sizing assistance.

Can I install solar panels myself?

Yes, most panels and kits are designed for DIY installation. We provide detailed wiring diagrams and mounting instructions.

What tools do I need for installation?

Basic tools such as wrenches, screwdrivers, and crimpers are sufficient. For rooftop installations, ensure proper sealing and grounding.

How often should I clean the solar panels?

We recommend cleaning your panels every 2–4 weeks using water and a soft cloth to remove dust or debris that may reduce efficiency.

Do the panels work on cloudy or rainy days?

Yes, though output will decrease. Our panels still generate up to 20–40% of their rated capacity under low sunlight.

Can I install systems indoors?

Batteries and controllers should be placed in well-ventilated, dry areas away from direct sunlight or flammable materials.

Are your solar panels certified?

Yes, all panels meet CE, RoHS, and ISO standards. Many models are also UL listed for North American markets.

How do you contribute to environmental sustainability?

We focus on recyclable packaging, lead-free production, and high-efficiency cells that reduce long-term carbon impact.

Do your batteries contain harmful materials?

No. Our LiFePO4 batteries are free from toxic heavy metals and are 100% maintenance-free.

Do you have a recycling or re-recycling program?

Yes, we encourage responsible disposal. Customers can return used batteries to designated recycling partners.