How to Convert Your Home to 100% Solar Power for Under $500

How to Convert Your Home to 100% Solar Power for Under 0


Going solar can seem daunting, especially if you’re on a tight budget. But with some strategic planning and DIY spirit, you can convert your home to run on 100% solar power for less than $500. In this guide, I’ll walk you through everything you need to know to make the switch to solar in a cost-effective way.

Assess Your Energy Usage

The first step is to understand your home’s energy consumption. This will help determine the size and type of solar system you need.

  • Use your utility bills to calculate your average monthly electricity usage in kilowatt-hours. Look at bills over the past year to account for seasonal changes.

  • Take an energy audit to identify the biggest electricity drains in your home. Replace old appliances and upgrade insulation to reduce energy waste.

  • Focus on transitioning these four areas first: lighting, refrigeration, electronics, and water heating. Together they account for over 75% of household electricity use.

Calculate Your Solar Needs

Once you know your energy usage, you can determine the solar capacity required to offset it.

  • Use an online solar calculator to recommend a system size based on your location and electricity data.

  • For a DIY budget system, plan for 10-20 watts of solar capacity per square foot of panels.

  • Factor in sunlight hours and angles in your area. More sun = smaller system.

  • Start small (100-300 watts) and expand over time as your budget allows.

Obtain Solar Components

Here are affordable ways to source components for under $500:

Solar Panels

  • Check craigslist and eBay for used solar panels. Many still work efficiently for years.

  • Buy discounted new panels from online solar suppliers and local recyclers.

  • Repurpose broken solar garden lights – the panels still generate energy!

Charge Controller

  • Find a used PWM controller at yard sales, craigslist or eBay.

  • Buy an inexpensive new PWM controller online for $50 or less.


  • Use a small 150-300 watt power inverter you likely already own.

  • Check thrift stores, craigslist and eBay for inexpensive used inverters.


  • Reuse lead-acid batteries from cars, boats, RV’s etc. Ask around!

  • Buy discounted refurbished batteries from solar suppliers.

  • Use a DIY saltwater battery for low cost storage.

Wiring and Mounts

  • Find scrap copper wire from old appliances and dismantled electronics.

  • Check craigslist and habitat for humanity for discounted used parts.

  • Use PVC pipe, old hinges and lumber for DIY panel mounts.

Install Your Solar System

Follow basic safety precautions during installation:

  • Shut off power at the breaker before wiring anything.

  • Wear rubber gloves and insulated tools when handling electrical components.

  • Follow all applicable electrical codes for your area.

  • Mount panels securely, accounting for wind and snow loads.

  • Use wire strain reliefs and weatherproof boxes for outdoor connections.

Maintain and Expand Your System

Take these steps to keep your budget solar running smoothly:

  • Check connections and clean panels seasonally.

  • Top off battery water levels every few months.

  • Monitor system output vs. usage to identify issues early.

  • Slowly add more capacity as time and budget allow.

  • Replace components as needed for optimal efficiency.


With smart planning and resourcefulness, you can feasibly meet 100% of your home’s electricity needs through solar power on a shoestring budget under $500. Prioritize efficiency, reuse materials, source secondhand parts, and install components safely. Your wallet and the planet will thank you! Let the sun provide the power.