Solar PV Design & Calculator

About Solar PV Design & Calculator

Plan, size and review solar power systems with guided calculations for loads, solar panels, batteries, inverters, MPPTs and string configurations.

Solar PV Design & Calculator brings key solar system design tools into one organized workflow. Whether you are exploring a home solar setup, comparing equipment or working through a preliminary system design, you can build your calculations step by step and keep important project information together.

☀️ SOLAR SYSTEM DESIGN

Follow a guided solar design workflow from electrical load and daily energy requirements through PV sizing, battery storage, inverter selection and panel string configuration.

Enter your own system assumptions and equipment specifications to create planning estimates suited to your project.

⚡ LOAD & ENERGY CALCULATOR

Add appliances and electrical loads with power, quantity and operating time.

Calculate:
• Connected load
• Daily energy consumption
• Appliance energy requirements
• Load totals for solar system planning

🔆 SOLAR PANEL & PV SIZING

Estimate the PV array required for your energy demand using parameters such as daily energy use, peak sun hours, system losses and panel specifications.
Review calculated solar array size, panel quantity and related system values.

🔋 BATTERY SIZING & BACKUP

Plan battery storage using battery capacity, system voltage, depth of discharge, efficiency and required backup.

Use battery calculations to estimate:
• Required battery capacity
• Battery runtime
• DC current
• Storage requirements

🔌 INVERTER SIZING

Estimate inverter requirements from your system load and review continuous power, startup or surge demand and DC-side requirements.

Use compatibility checks to help identify configurations that need further review.

📐 MPPT & SOLAR STRING DESIGN

Check panel and MPPT specifications before planning a string configuration.

Calculate and review:
• Panels in series and parallel
• String voltage and current
• PV array power
• MPPT operating limits
• Temperature-adjusted panel voltage
• Electrical compatibility conditions

Solar designer app can highlight PASS, ATTENTION, NOT VERIFIED and FAIL conditions to make design review easier.

📁 SAVE SOLAR PROJECTS

Save and reopen solar design projects on your device. Your project calculations and equipment inputs remain available for later review and editing.

📊 SAVINGS & PAYBACK

Solar Pro includes Savings & Payback tools for estimating potential financial results from your own electricity rates, system costs and assumptions.

Estimates depend on the information you provide and should not be treated as guaranteed savings or investment returns.

📄 SOLAR DESIGN REPORTS

Review your calculated system in a structured design report.
Solar Pro can export design reports as PDF so you can save or share your planning results.

⭐ SOLAR PRO

Unlock Solar Pro, the premium tier of Solar PV Design & Calculator, for:

• Unlimited saved projects
• PDF design report export
• Savings & Payback tools
• Ad-free use while Solar Pro is active

The open version includes the complete guided solar Designer and core calculation tools.

🛠️ BUILT FOR PRACTICAL SOLAR PLANNING

Useful for homeowners, solar installers, electricians, technicians, students and DIY users who want an organized solar calculator for preliminary system planning and equipment sizing.

Important: Calculations are estimates based on user-entered values, equipment specifications and assumptions. Solar Design Toolkit does not replace equipment manufacturer requirements, site evaluation, applicable electrical codes or review by a qualified solar professional.