Your Ultimate Guide to Choosing the Right Solar Generator

Amporah
Jul 2
3 min read

Updated: Jul 13

Looking to go off-grid or just need backup power during outages? A solar generator can be a game-changing investment for anyone who wants clean, renewable, and portable energy. However, with so many options on the market, how do you choose the right one for you?

In this guide, we'll walk you through the key factors to consider when choosing a solar generator. We'll cover capacity, solar input, portability, and budget. Whether you're powering a van, charging devices while camping, or preparing for unexpected power outages, this guide will help you make the right decision.

🔋 1. Capacity: How Much Power Do You Really Need?

The capacity of a solar generator is measured in watt-hours (Wh). This measurement determines how much electricity the generator can store and provide.

Questions to Ask:

What devices do you need to power?
How long will you need to run them?

Examples:

Phones, tablets, small lights: 200–500Wh
Laptops, CPAP machines, routers: 500–1,000Wh
Mini fridges, power tools, TVs: 1,000–2,000Wh
Home appliances, microwaves, backup use: 2,000Wh+

Choose a generator with 20–30% more capacity than your daily usage. This gives you a buffer and improves efficiency. Compare solar generator capacities and best models ➜

☀️ 2. Solar Input: How Fast Can It Recharge?

Solar input determines how quickly your generator can recharge using solar panels. This is crucial for off-grid use.

Look For:

Wattage support: Can the generator handle 100W, 200W, or more?
Input type: MC4, XT60, Anderson ports, etc.
MPPT Controllers: These improve solar charging efficiency.

Tip: The more solar input wattage your generator supports, the faster it can recharge. This is especially important on cloudy days or during short daylight hours. Read our guide to compatible solar panels ➜

🧳 3. Portability: Will You Be Carrying It Often?

Portability is key if you plan to travel, camp, or move your setup regularly.

Consider:

Weight: Some large units weigh over 50 lbs (25kg).
Handles/Wheels: Look for easy transport options.
Compact Design: This is crucial for van life or small spaces.

If you need something highly mobile, opt for models under 20 lbs (9kg). See lightweight solar generators under 20 lbs ➜

💰 4. Budget: How Much Should You Spend?

Solar generators can range from £150 to over £2,000. Your budget will directly affect the balance between capacity, features, and brand reputation.

Budget Guide:

Under £300: Basic units for phones and LED lights.
£300–£800: Mid-range models suitable for laptops, CPAPs, and camping gear.
£800–£1,500+: High-capacity generators designed for fridges, backup systems, and solar integration.

Don't forget to factor in the cost of solar panels, which are usually sold separately. Browse top solar generators by price range ➜

🛠️ Buying Guide: Key Features Checklist

Use this checklist to effectively compare solar generator models:

Battery capacity (Wh)
Continuous and surge power rating (W)
Solar panel compatibility and maximum input
Number of AC/DC/USB ports
MPPT charge controller
Expandability (extra battery support)
Portability factors (handles, weight, size)
Display panel and app controls
Warranty and customer support

You can download our Free Buying Checklist PDF ➜.

⚡ The Importance of Maintenance

Keep Your System Efficient

Maintaining your solar generator can prolong its life and ensure efficient performance. Regularly check the connections, clean the solar panels, and monitor battery health. This will help you get the most out of your investment.

✅ Final Thoughts

Choosing the right solar generator depends on your specific needs and use cases. Are you a camper, van lifer, or digital nomad? Perhaps you just want peace of mind at home? Selecting the right capacity, input options, and portability features is vital to ensure you’re never left in the dark.

Need more help deciding? Check out our roundup of the Best Portable Power Stations for 2025 ➜ to compare top-rated models and find the perfect fit.