4kW Solar System
For households consuming around 20 units of electricity daily, a 4kW solar system is a viable option. However, the installation costs can be significant, as it requires a 5KVA inverter and four batteries.
This article explores how to install India’s most affordable 4kW solar system, including the choice of solar panels, inverters, and batteries.
Cheapest Polycrystalline Solar Panel
Polycrystalline solar panels are the most economical option, priced between Rs 25 to Rs 30 per watt. A 4kW system typically requires 12 panels, costing around Rs 112,000.
For limited space, consider mono PERC panels, which are available up to 500 watts and priced around Rs 130,000.
5kVA Solar Inverter
A 5KVA inverter is essential for a 4kW system, available for approximately Rs 45,000. This inverter can handle loads up to 4kW and accommodate up to 5kW of solar panels.
Affordable Batteries
Lead-acid batteries are the most cost-effective option. Prices range from Rs 10,000 for 100Ah to Rs 17,000 for 200Ah batteries.
Total Cost
- Inverter PWM – Rs. 45,000
- 4 x 100Ah Solar Battery – Rs. 40,000
- 4kW Poly Solar Panel – Rs. 112,000
- Extras – Rs. 25,000
- Total – Rs. 222,000
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Summary at glance
A 4 kW solar system is suitable for households consuming around 20 units of electricity daily. While installation costs can be high due to the need for a 5 KVA inverter and four batteries, affordable options exist. Polycrystalline panels, priced at Rs 25-30 per watt, are the cheapest, while mono PERC panels offer efficiency in limited space. The total cost for a basic setup, including panels, inverter, and batteries, is approximately Rs 222,000.
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