General FAQ

1. What are the essentials for completing an off-grid solar power system?

To achieve a fully functional off-grid solar power system, you'll need a combination of components, matching controllers, batteries that meet system requirements, and cables with corresponding specifications. If you require AC power, incorporating an inverter is essential for generating AC output.

2. Can these panels generate electricity during cloudy days?

While solar panels can generate electricity under cloudy conditions, it's important to note that the generation efficiency will be reduced.

3. How should I connect the solar panel to the system? (Series vs. Parallel)

You have the flexibility to connect solar panels either in series or in parallel. In series connection, the operating voltage outputs of the panels are superimposed, while parallel connection results in the cumulative operating current outputs.

4. Can different panel brands be mixed together?

It is not recommended to mix panels from different brands. It is advisable to adhere to the specific instructions provided by the manufacturer.

5. Are the panels equipped with mono-cells or poly-cells?

Mono-component cells are characterized by round chamfers, while poly-components feature straight chamfers.

6. Why isn't my solar panel generating power as per its nameplate rating?

The electricity output of solar panels can be influenced by various factors, including sunlight availability, temperature, and the presence of dirt or stains on the glass surface.

7. What's the recommended method to clean solar panels?

For effective cleaning, it is advised to use alcohol. Dust and sediment can be removed using a dry cloth.

8. Are these panels suitable for grid-connected systems?

All the components can be seamlessly integrated into both off-grid and grid-connected systems, with the exception of portable rechargeable PV products.

9. Do the panels come with pre-drilled holes at the back? Are roof brackets included?

Each component's frame includes mounting holes, leakage holes, and ground holes. However, the modules are sold without accompanying brackets. To facilitate installation, "Z" brackets can be purchased separately, ensuring compatibility with the module's mounting holes.

10. Does the solar panel include all necessary wiring?

The component itself is equipped with a junction box connector for output voltage. If you plan to connect it to an off-grid system, additional appropriate wiring must be procured.

11. How do I determine the required number of solar panels?

To ascertain the quantity of solar panels needed, it is essential to assess the electrical load requirements of your system. Power is measured in watts, while capacity is typically expressed in watt-hours. Consider the number of working hours required and apply a safety factor of 1.5-2 for accurate estimation.

12. If the original mark or sticker is no longer visible, how can customers identify positive/negative cables visually?

The connector heads of the component connectors are clearly marked with positive and negative labels, facilitating easy identification.

13. Why do solar panels have higher open circuit voltages compared to other system components? Is there a risk of controller damage?

The higher open circuit voltage of solar panels is an inherent characteristic determined by their physical properties. When connected to a controller, a normal voltage drop occurs, ensuring the controller remains protected and undamaged.

14. What distinguishes high-power modules from low-power modules?

High-power modules utilize cells with higher efficiency, resulting in enhanced power generation efficiency. Compared to low-power modules, fewer high-power modules are required to meet the desired energy output. This convenience extends to the wiring and installation process as well.

15. Can I walk on bendable or border components?

We strongly discourage walking on bendable or border components, as doing so can exert excessive pressure on a specific area, potentially leading to cracks and damage.

Shipping/Warranty FAQ

1. What kind of warranties cover your solar products?

The warranty periods for Calpha's solar products are as follows:
- Rigid Solar Panels: 5-year material and workmanship warranty
- Flexible Solar Panels: 2-year material and workmanship warranty
- Solar Charge Inverter: 2-year warranty (MPPT)
- LiFePO4 Lithium Battery: 5-year material and workmanship warranty

2. How can I activate my warranty?

To activate your warranty, visit the Product Registration page in our support area and fill out your information online.

3. How do I check the status of my order?

You will receive an email confirmation with your tracking number once your order has shipped from our warehouse. You can also view tracking numbers once your order has shipped by logging into your customer account.

4. When will my order arrive?Continental U.S.

Ground: Most Calpha products have free ground shipping offered and can take between 3-5 business days.

Two Day: Two Day shipping is available for orders shipped within the 48 contiguous United States. Second Day delivery orders will be processed on the same day if placed by 12:00pm PST on a business day or processed the following business day if placed after 12pm PST.

5. Do you ship to APO/PO Boxes?

Unfortunately, we cannot ship orders to PO Boxes. Please ensure you provide a valid street address for delivery.