Solar Panels

A: Our MOQ is 1 set.

A: Yes. Your customized requirements for color, logo, design, package, carton mark, your language manual etc. We are very welcome

A: It will take about 10-15 days to finish an order. But the exact time is according to actual situation.

A: T/T, L/C and so on.(Contact with customer our service.)

A: Yes, we are welcome to do OEM for our clients.

A: Depends on household energy consumption (kWh/month), panel wattage(e.g., 400W), sunlight hours at your location, and roof space/orientation.
Formula: (Monthly kWh usage / 30) / (Avg. peak sun hours) / Panel efficiency ≈ kW system size needed. Then (kW needed * 1000) / Panel Wattage ≈ Number of panels.
Typical US Home: Needs a 6-12 kW system, requiring 15-30 panels (using common 400W panels).

A: Best: Let rain rinse them naturally.
If Needed (noticeable dirt/dust/bird droppings):
* Safety First: Work from the ground if possible. Use a stable ladder on solid ground if roof access is essential. Avoid walking on panels.
* When: Early morning, evening, or cloudy day (cool panels).
* Tools: Soft brush/ sponge, garden hose. Use deionized or distilled water if possible to prevent mineral spots. If tap water is necessary, squeegee dry.
* Avoid: Harsh chemicals, abrasive scrubbers, and high-pressure washers (can damage seals).
* Frequency: Typically once or twice a year, more often in very dusty/dry areas or near trees/birds.

A: Photovoltaic Effect: Sunlight (photons) hits solar cells (usually silicon).
Electron Excitation: Photons knock electrons loose in the silicon atoms.
Electric Field: An internal electric field (created by the p-n junction structure of the cell) forces these loose electrons to flow in a specific direction.
Direct Current (DC): This flow of electrons creates an electrical current (DC electricity).
Inverter: A device converts the DC electricity into Alternating Current (AC) electricity used by your home appliances.
Power Flow: AC electricity powers your home. Excess can feed back to the grid (if grid-tied) or charge batteries (if installed).

A: Efficiency measures how much sunlight hitting the panel is converted into usable electricity. A 20% efficient panel converts 20% of sunlight energy into electrical energy.
* Typical Range: Most commercially available panels are 15% to 22% efficient.
* High-End: Premium monocrystalline panels can reach 22-24%.
* Factors: Cell type (monocrystalline is most efficient), temperature (efficiency drops as heat increases), shading, dirt, wiring losses.

A: Strongly Recommended: Hire licensed, certified solar installers. It involves electrical work, roofing, permits, and safety risks.
General Process:
1. Site Assessment & Design: Evaluate roof, shading, and energy needs. Design system layout.
2. Permitting: Obtain necessary electrical and building permits.
3. Roof Preparation: Install mounting hardware (racks, flashings) securely to roof rafters.
4. Electrical Work: Run conduit from roof to electrical panel. Install inverter(s) and disconnect switches.
5. Panel Mounting: Secure panels to the racking system.
6. Wiring: Connect panels together (series/parallel) and to the inverter.
7. Inverter Connection: Connect the inverter output to the home's electrical panel (often via a breaker).
8. Inspection & Interconnection: The Local authority inspects. Utility company approves connection to the grid ("Permission to Operate" - PTO).

A: Lifespan: Most quality panels are designed to last 25-30 years or more.
Degradation: Efficiency slowly decreases over time. Standard warranty guarantees ~80-90% output after 25 years (~0.5% degradation per year).
Durability: Panels are built to withstand weather (hail, wind, snow). Warranties often cover material defects and power output for 10-12 years and 25+ years respectively.
Inverters: Typically need replacement sooner, around 10-15 years.

A: Interpreted as site preparation
* Energy Audit: Understand your electricity usage.
* Roof Assessment: Ensure roof is in good condition (replace if needed within next 10-15 years), has sufficient space, and good sun exposure.
* Shading Analysis: Identify any obstructions (trees, chimneys) that cast shade during peak sun hours.
* Financing: Explore purchase, loan, or lease options and incentives (tax credits, rebates).
* Get Quotes: Obtain proposals from 3-5 reputable installers.
* Select Installer & System: Choose based on reputation, warranty, equipment quality, and price.

A: * Monocrystalline (Mono-Si): Made from single silicon crystals. Most efficient (15-24%), most expensive. Black appearance.
* Polycrystalline (Poly-Si): Made from multiple silicon fragments melted together. Less efficient (13-16%), less expensive. Blueish appearance.
* Thin-Film: Made by depositing thin layers of photovoltaic material (e.g., CdTe, CIGS, a-Si) onto glass, metal, or plastic. Least efficient (7-13%), least expensive, flexible, lightweight. Lower space efficiency. Used in large commercial projects or specific applications.
* PERC, Bifacial, etc., are subtypes/technologies often within Mono/Poly categories.

A: Ideal: Angle equal to your location's latitude for maximum annual energy production.
Seasonal Adjustment: Tilt steeper than latitude in winter (capture low sun), flatter than latitude in summer (capture high sun).
Practicality: Fixed roof mounts are usually set at the roof pitch. Ground mounts or tracking systems can be optimized. Tilt angles between 30-45 degrees are often very effective in temperate latitudes.

A: High Solar Irradiance: Areas with abundant, direct sunlight (deserts, sunny plains).
Latitude: Generally better closer to the equator, but viable almost everywhere with sufficient sun hours.
Local Climate: Sunny days > cloudy/rainy days. Cooler temperatures improve panel efficiency.
Site-Specific:
* Roof/Space: Unshaded south-facing roof (Northern Hemisphere) / north-facing roof (Southern Hemisphere). East/West also works well. Sufficient usable area.
* Shading: Minimal obstruction from trees, buildings, chimneys, etc., especially during 9 am - 3 pm.
* Roof Condition: Structurally sound roof with good orientation and pitch.
* Local Incentives: Government policies, net metering availability, and utility rates significantly impact financial viability.