The Free Solar Designer
for novice learners to professional conractors.
Stop guessing your energy requirements. Our Solar Designer simulates real-world irradiance physics, component degradation, and battery chemistry to validate your exact PV architecture.
Advanced Solar System Sizing Capabilities
Engineer resilient PV architectures with our professional-grade irradiance and battery simulation tools.
Irradiance Simulation
The physics engine accounts for peak sun hours, panel efficiency ratings, and environmental degradation to calculate true real-world yields.
Battery Chemistry Matrix
We natively model the depth-of-discharge limitations between Lithium Iron Phosphate (LiFePO4) and traditional Lead Acid batteries.
Inverter Load Balancing
The Solar Designer constantly validates your total AC wattage draw against your selected inverter threshold to prevent system clipping.
Grid Specialization
Whether grid-tied, hybrid, or fully independent, this tool calculates all your critical energy autonomy and performance parameters.
System Validation
As you adjust components, the engine instantly flags warnings if your battery bank is too small or if your panel array exceeds charge controller limits.
100% Client-Side Physics
The complex mathematical formulas run entirely within your browser's WebAssembly/JS engine, guaranteeing zero latency during component design.
Why standard PV estimators suck compared to the Solar Designer
Whether you are building a massive grid-tied array, outfitting a hybrid smart-home, or powering a remote off-grid cabin, you know that standard "how many panels do I need" calculators are practically useless. They ignore critical physics like inverter efficiency loss, system voltage limits, and—for battery-backed systems—depth-of-discharge constraints.
Building a system on flawed math leads to inverter clipping during peak sun or dead batteries in the winter. We built the Solar Designer to solve this exact problem by introducing real electrical engineering logic into a clean web interface.
How the Solar Designer Engine Works
The Solar Designer maps all four critical pillars of solar architecture: Load (Demand), Array (Supply), Storage (Battery), and Processing (Inverter).
As you input your appliances, the engine calculates the exact Watt-Hour requirement. It then mathematically validates that demand against your selected battery chemistry's safe discharge floor, ensuring your design can confidently survive multiple days of terrible weather.
Universal Support for all PV Architectures
Because the Solar Designer maps the fundamental physics of electricity rather than relying on generic templates, it empowers both novice learners and professional contractors to simulate and validate all three major types of solar installations with pinpoint accuracy:
Grid-Tied (On-Grid)
When designing a grid-tied array for residential net metering, you don't need to worry about batteries. However, you must meticulously match your solar panel array's peak DC wattage against your grid-tied AC inverter limits. The Solar Designer instantly flags DC-to-AC ratio imbalances, preventing expensive clipping during peak summer sun and ensuring you squeeze every possible cent of ROI out of your utility company.
Off-Grid (Stand-Alone)
Building a remote off-grid cabin, tiny house, or outfitting a marine vessel? You are your own power company. Use the Solar Designer to rigorously stress-test your system. By mapping your specific appliance load against Lithium Iron Phosphate (LiFePO4) or AGM Lead Acid battery chemistries, the engine calculates your exact days of autonomy, ensuring your lights stay on even during a three-day winter blizzard.
Hybrid (Battery Backup)
The most complex architecture to engineer is the modern hybrid smart-home. You want the lucrative financial benefits of grid-tied net metering combined with the critical safety of off-grid battery backups. The tool lets you balance this complexity by validating transfer switch loads, sizing hybrid inverters correctly for grid failure surges, and ensuring your emergency battery bank is perfectly tuned for blackout scenarios.