People are preferring to install a solar system for its low maintenance and low electricity bill. Many standalone houses are now going solar as monthly electricity bills are high.
For a 3-4 bhk house running a refrigerator, washing machine, 3-4 light/ bulbs, fans, iron etc. four Shark solar panels (22% efficiency level) will be enough. A 2.5 kVA solar system (one inverter and two batteries) is generally enough for such houses.