Solar Calculator

To calculate your needs, list every appliance you plan to run on solar, find their wattage (W), and estimate how many hours per day they will run. Multiply Watts by Hours to get Watt-hours (Wh). Our calculator automates this math to give you a precise system recommendation.

Your inverter should be able to handle the peak load (total watts) of all appliances running at the same time. We recommend an inverter with a capacity at least 25% higher than your total load to account for surge currents from devices like refrigerators and pumps.

For a typical 5kVA (approx 4kW-5kW) system, you generally need between 8 to 12 high-efficiency panels (like our 590W mono-crystalline modules), depending on your daily energy consumption and the amount of sunlight in your region.

Battery storage is calculated based on your night-time usage and a “depth of discharge” safety margin. This ensures you don’t drain your batteries to zero, which extends the lifespan of your Itel Solar lithium or gel batteries.

Monocrystalline panels (like the Itel 590W) are made from a single crystal structure, making them more efficient and better at performing in low-light conditions. Polycrystalline panels are generally cheaper but require more roof space to produce the same amount of power.

The lifespan depends on the technology. Lithium (LiFePO4) batteries typically last 10 to 15 years (3000+ cycles), while traditional Gel or Lead-Acid batteries usually last 2 to 3 years. Investing in Itel Lithium storage reduces long-term replacement costs.

Yes! Solar panels need daylight, not just direct heat. While output is lower on very cloudy days, your system will still charge. Our High-Efficiency Pro Inverters are designed to optimize every bit of available current during the rainy season.

Solar systems are very low-maintenance. The most important task is cleaning the panels every few months to remove dust. Aside from that, ensuring your inverter is in a well-ventilated area and checking cable connections once a year is usually all that is needed.