SolarCostPro Analytics

Advanced Solar Panel Calculator

The web's most precise solar load calculator. Calculate your solar battery bank size for tiny houses and vans.

Precision Tool • SolarCostPro Engineering

Generate Your Complete Off-Grid Plan

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Essential Knowledge

How to Plan Your Off-Grid Journey

Step 1: Calculate Load

Optimize your off-grid energy audit with high-efficiency 12V DC refrigerators and low-power laptops. Understanding daily watt-hour consumption for solar-powered appliances is the foundation of a reliable off-grid power system design.

Pro Tip: Add 25% Buffer

Step 2: Storage Power

Lithium (LiFePO4) is the industry standard for 2026, offering 10x more battery life cycles than lead-acid. For a reliable solar battery storage system, choosing deep cycle lithium batteries ensures the best off-grid power backup and long-term energy efficiency.

Reliable Energy
Got Questions?

Frequently Asked Questions

How many solar panels for a Tiny House?

Typically 400W to 800W. If you run electric heating or induction stoves, you might need up to 1200W.

Can I run an AC off-grid?

Yes, but it requires a 3000W+ inverter and a massive battery bank. Look for DC-powered mini-splits for better efficiency.

How long will my batteries last?

Lithium (LiFePO4) batteries typically last 10-15 years, while Lead Acid batteries last 3-5 years. For maximum life, avoid discharging your batteries below 20%.