SolarSystemCalculator
Select your appliances, set quantities, choose your backup duration - and get an instant estimate of the solar system size you need.
Select Your Appliances
Choose appliances and set quantities
Backup Duration
How long do you want backup power?
Estimates are approximate. Final sizing requires a professional assessment.
Three simple steps
Get a reliable system estimate in under two minutes.
Select Appliances
Choose the devices you want to power and set the quantity for each. We'll calculate your total connected load automatically.
Set Backup Hours
Tell us how many hours of backup power you need during outages. This determines your battery capacity requirement.
Get Your Estimate
Instantly see your recommended system size, battery configuration, and a button to request a formal quote from our team.
Get the most accurate estimate
Follow these tips to ensure your calculator results closely match what a professional site assessment would recommend.
Book Free AssessmentInclude everything you want to run simultaneously
The calculator assumes all selected appliances may run at the same time. Be realistic about your usage patterns.
Fridges and freezers cycle on and off
While their rated wattage is shown, they don't run continuously. Our calculator applies a realistic duty cycle for accurate battery sizing.
Air conditioners are high-draw appliances
Each AC unit typically requires 1-1.5kW. If you plan to run multiple ACs, consider a 10kW+ system for reliable performance.
Longer backup = larger battery bank
Battery capacity scales linearly with backup hours. For 8+ hours of backup, expect a significant battery investment.
Pump sizing matters
Water pumps have high startup currents. Our calculator applies minimum inverter sizes based on HP to ensure reliable pump operation.
Battery configurations we use
We stock and install premium lithium battery banks in standard configurations. The calculator recommends the best setup for your needs.
Common questions
The calculator provides a reliable estimate based on standard appliance wattages and industry sizing formulas. However, actual requirements may vary based on appliance efficiency, usage patterns, and site conditions. We always recommend a free professional site assessment for final system sizing.
Refrigerators and freezers have high startup (surge) currents — often 3-5x their running wattage. A minimum 3kW inverter ensures the compressor can start reliably without tripping the system, even when other appliances are running.
Absolutely. While we offer standard packages (1kW, 3kW, 5kW, 10kW, 16kW), we design custom systems for unique requirements — including 150kW+ commercial installations, specialized agricultural setups, and hybrid configurations. Use the 'Request This System' button to get a custom quote.
Our team will contact you within 24-48 hours to schedule a free site assessment. We'll verify your requirements, inspect your property, and provide a detailed quote with equipment specifications, installation timeline, and payment options — including our 30-day payment plan.
Let our engineers design your perfect system
The calculator gives you a great starting point. For a precise, site-specific design - book a free consultation with our certified engineers.