The Uses of Different Sizes of Solar Panels for Prepping

Solar energy offers an invaluable solution for “preppers”, providing sustainable, off-grid power during emergencies. Different sizes of solar panels serve specific needs, from charging small devices to running entire households. In this article, we’ll explore the uses of various solar panels—from small notebook-sized models for mobile devices to larger systems capable of powering homes—along with the additional components required for more extensive setups.

1. Notebook-Sized Solar Panels: Charging Small Devices on the Go

Typical Size: 6-10 inches wide (5-10W)
Primary Use: Charging smartphones, GPS devices, and small gadgets

Notebook-sized solar panels are highly portable, making them perfect for preppers on the move. These compact panels, often equipped with USB ports, can generate just enough energy to recharge smartphones, GPS devices, or small radios. Lightweight and easy to carry, they are great additions to bug-out bags or hiking gear. Some of these panels can attach to backpacks, allowing users to charge while walking.

Best Use Cases:

• Bug-out bags: Power essential electronics without adding bulk.
• Camping and hiking: Keep communication devices operational.
• Emergency backup: Provides power in remote or off-grid situations.

Although these small panels don’t offer much power, they can serve as a life-saving tool in emergencies where communication or navigation is critical.

2. Laptop-Sized Folding Solar Panels: Charging Power Banks and Radios

Typical Size: 10-20 inches folded (20-60W)
Primary Use: Charging power banks, tablets, and small DC appliances

A step up from notebook-sized panels, laptop-sized folding solar panels offer more wattage. They are ideal for charging portable power banks, radios, and small fans. Many come with multiple USB ports and even DC outputs, providing versatility for preppers needing to charge several devices.

Pairing one of these panels with a small power bank allows you to store energy for use at night or during cloudy weather. With moderate sun exposure, these panels can keep essential devices like tablets, radios, and rechargeable lights powered for longer periods.

Best Use Cases:

• Portable power systems: Charge radios, walkie-talkies, and tablets during outages.
• Vehicle emergency kits: Useful in roadside emergencies when car batteries fail.
• Extended grid-down situations: Keep small electronics operational for long-term use.

These panels are also popular among van-lifers and RV travelers, providing portable energy solutions for life on the road.

3. Full-Sized Solar Panels: Running Home Appliances and Battery Systems

Typical Size: 40-60 inches (100-400W per panel)
Primary Use: Charging solar generators, powering refrigerators, lights, and entire home systems

Full-sized solar panels are essential for more permanent energy solutions, capable of running household appliances and entire off-grid setups. However, these panels require additional components to store and convert solar energy into usable power. Below is a breakdown of what you need for an effective solar power system.

Key Components for Full-Sized Solar Systems

1. PWM or MPPT Charge Controller
   A charge controller regulates the electricity flow from the solar panels to the batteries to prevent overcharging. There are two main types:
   • PWM (Pulse Width Modulation): More affordable but less efficient, suitable for budget systems.
   • MPPT (Maximum Power Point Tracking): Highly efficient and ideal for larger solar setups, optimizing the power transferred to the batteries.
   Purpose: Prevents battery damage and maximizes panel performance.
2. Power Inverter
   Solar panels generate DC (Direct Current), but most household appliances run on AC (Alternating Current). A power inverter converts DC into AC power, enabling you to use regular appliances such as refrigerators, fans, and TVs.
   • Pure sine wave inverters: Suitable for sensitive electronics (e.g., computers, medical devices).
   • Modified sine wave inverters: Cheaper but less compatible with sensitive equipment.
   Purpose: Converts solar power into usable electricity for household devices.
3. Deep Cycle Battery (or Battery Bank)
   Since solar panels only generate power during daylight hours, batteries store excess energy for use at night or during cloudy weather. Lithium-ion or AGM (Absorbed Glass Mat) deep cycle batteries are recommended due to their ability to handle frequent charging and discharging cycles.Purpose: Provides consistent power, even when the sun isn’t shining.
4. Solar Generator (Optional)
   A solar generator is an all-in-one system that includes a battery, charge controller, and inverter. These are excellent for preppers who need a portable solution for emergencies or bug-out situations.

System Example for Off-Grid or Emergency Use

Below is an example of a complete solar system that can support essential household appliances and maintain power during extended outages:

• Panels: 6 x 200W solar panels = 1200W total capacity
• Charge Controller: MPPT controller for efficient energy management
• Battery Bank: 2 x 100Ah lithium batteries = 2,400Wh of energy storage
• Inverter: 2000W pure sine wave inverter to power appliances like refrigerators and TVs
• Wiring and Fuses: Proper cabling to connect components safely

This system can comfortably power a refrigerator (150W) for 8+ hours and run lights, fans, and small appliances. During the day, the solar panels replenish the batteries, ensuring continuous operation. The 1200W capacity offers flexibility to power multiple devices simultaneously and is ideal for both off-grid living and emergency preparedness.

Best Use Cases:

• Whole-home backup: Maintain essential appliances during extended power outages.
• Off-grid living: Power remote cabins, homesteads, or bug-out locations.
• Emergency preparedness: Keep medical devices and critical systems operational during emergencies.

Choosing the Right Solar Panel for Your Needs

Whether you need to keep a smartphone charged or power your entire home, the right solar panel can make all the difference. Here’s a quick comparison of the different panel sizes and their best uses:

Conclusion

Solar panels are a critical resource for preppers, offering reliable, renewable energy in a variety of sizes. Small notebook-sized panels are perfect for charging essential devices during short-term emergencies. Laptop-sized folding panels provide more power for radios, tablets, and power banks, making them ideal for longer outages or off-grid adventures. Full-sized solar panels, combined with a charge controller, inverter, and battery bank, can power entire households, offering long-term energy independence.

By choosing the right solar setup for your needs—whether for mobile use or a permanent off-grid solution—you can ensure that you and your family remain prepared for any situation.