How to Make a Solar Power Supply with Battery

 Are you tired of constantly replacing batteries for your electronic projects? Or perhaps you want a reliable, renewable energy source that frees you from dependence on traditional power grids? If so, harnessing solar power might be the solution you're seeking. In this guide, we'll explore how to create a solar power supply system with a battery backup, drawing from real-world experience and practical insights.

The Problem: 

Traditional power sources can be limiting, especially for remote or outdoor projects such as IoT projects or WiFi WISP Projects on remote mountains where there is lack of electricity. Relying on batteries means ongoing costs and environmental impact due to disposables. Understanding how to leverage solar energy can provide a sustainable and independent power solution.

The Solution: 

By utilizing a photovoltaic solar panel to generate electricity and trickle charge a battery, you can create a self-sustaining power system for your projects. The key components include a solar panel, a battery, and a diode to prevent reverse current flow, as illustrated in PV solar charger circuit diagram below.

PV solar charger circuit

Why Solar Panels? 

Solar panels consist of solar cells wired together to amplify voltage output. It's crucial to select a solar panel with an output voltage higher than that of the battery to ensure efficient charging. Additionally, a diode is essential to protect the solar panel from damage by preventing reverse current flow.

Figures and Calculations: 

The following figure showcases a range of solar panels, including their nominal power outputs and dimensions. 

solar panels various size

Practical tests, as detailed in solar panel output power table below, reveal the actual power output of these panels under different conditions. For instance, even a high-quality 20W panel may only deliver around 1/3 of its rated power output in real-world scenarios. 

solar panel output power
Similarly, the solar panel output voltages table below demonstrates the variation in output voltages of solar panels under different lighting conditions.

Solar Panel Output Voltages

Practical Considerations: The performance of solar panels is heavily dependent on sunlight exposure. While they can produce significant power in direct sunlight, their efficiency drops substantially in shadow or on cloudy days. Therefore, using solar power indoors for anything beyond micro-amp projects may not be feasible without ample sunlight exposure.

Conclusion: Harnessing solar power for your electronic projects offers numerous benefits, including sustainability, independence from traditional power sources, and cost savings in the long run. By understanding the practical considerations, selecting appropriate components, and leveraging real-world data, you can create a reliable solar power supply system with a battery backup for your projects. So, why not embark on your solar energy journey today and experience the power of the sun firsthand?

Whether you're an electronics enthusiast, a hobbyist, or a professional, integrating solar power into your projects opens up a world of possibilities while contributing to a greener future. So, roll up your sleeves, gather your components, and let the sun power your creations!

Post a Comment

Previous Post Next Post