How many panels do I need for 1000 kWh per month?

This depends on your sun hours and panel wattage. Use the calculator above to get your exact recommendation.

What’s a good sun hour estimate?

Most areas get 3–6 hours per day. Use 4.5 as a safe average or look it up using solar maps.

Do I need battery storage?

Batteries store energy for nighttime or power outages. Not required for grid-tied homes, but great for boats, cabins, or off-grid living.

Can I install solar myself?

Yes, DIY solar kits exist and can be much cheaper. Always follow safety codes and consider pro help if unsure.

How Decodeji Makes Solar Planning Easy for Anyone

The Free Solar Estimator That Makes Planning Easy

Planning a solar setup can be confusing — but it doesn’t have to be. The free Decodeji Solar Estimator gives you instant answers based on your real-world needs. Whether you’re powering a home, running a business, living off-grid, or outfitting a boat, this tool shows you how many panels you need, how much space they’ll take, and even suggests an inverter and battery setup.

Real-World Scenarios Where This Tool Helps

🏠 Homeowners: Estimate your monthly usage and get a system size that fits your roof and budget. Perfect for grid-tied or hybrid setups.
🛶 Boat or Van Owners: Use low-wattage panels and sun-hour averages to get just enough power for life on the move — without wasting money on oversized systems.
🏕️ Off-Grid Cabins: Know exactly how many panels and how much battery capacity you'll need for remote, self-sufficient living.
🏢 Small Businesses: Get a fast estimate for reducing utility bills and going green — whether you're running a shop, office, or small warehouse.

What You Get in Seconds

Total system size in kW
Number of panels needed (based on your panel wattage)
Estimated roof or mounting area
Suggested inverter size
Battery storage tips (when needed)
Cost estimates for DIY vs installed options

What Makes This Tool Different

Most solar estimators ask for your email or try to sell you a quote before giving useful info. Decodeji flips that. It’s free, private, and built to give you instant results — no strings attached. Whether you’re in the research phase or ready to install, this tool saves time and confusion.

Accuracy That’s Actually Useful

Rather than vague ranges, the estimator uses real inputs: your monthly usage, sun hours, and panel wattage. That means you’re not guessing how many panels or how much space you need — you’re seeing it clearly, within seconds.

Great for DIY and Professionals

If you’re installing your own system (like on a boat or cabin), this gives you clarity on panel count and roof size. If you’re hiring a pro, you’ll walk into the conversation knowing exactly what size system to expect — no upselling surprises.

Designed for All Lifestyles

This isn’t just for homes. Whether you’re off-grid in a tiny cabin, powering an RV, or cutting costs for your shop or café, the Decodeji tool adapts to your situation. It even provides battery suggestions for independence from the grid.

Example Output

Example: A cabin with 500 kWh/month usage and 5 sun hours per day needs about 3.3 kW of solar — around 9 panels — and about 6 m² of roof space.

Start Smart, Not Blind

Solar isn’t one-size-fits-all. This tool helps you begin the journey with numbers that make sense — and if you’re already shopping for a system, you’ll understand what you actually need.