Choosing between a solar water heater and a geyser depends on several factors, including your energy needs, budget, and environmental concerns. Here's a quick comparison to help you decide:

Solar Water Heater
Pros:

Energy Efficiency: Utilizes renewable solar energy, reducing reliance on electricity or gas.
Cost Savings: Lower utility bills over time due to reduced energy consumption.
Environmental Impact: Eco-friendly, with no greenhouse gas emissions.
Long-Term Investment: Durable and cost-effective in the long run.
Cons:

Initial Cost: Higher upfront cost for installation and equipment.
Dependence on Weather: Less effective on cloudy days or in regions with low sunlight.
Space Requirement: Requires installation space for solar panels.
Geyser (Electric Water Heater)
Pros:

Immediate Hot Water: Provides hot water on demand, regardless of weather conditions.
Lower Initial Cost: Typically less expensive to purchase and install compared to solar water heaters.
Compact Design: Generally takes up less space and is easier to install.
Cons:

Higher Energy Consumption: Uses electricity or gas, leading to higher utility bills.
Environmental Impact: Contributes to greenhouse gas emissions if powered by non-renewable energy sources.
Ongoing Costs: Regular energy costs for operation and maintenance.

Conclusion
Solar water heaters are ideal if you prioritize long-term cost savings and environmental benefits and have access to adequate sunlight. Geysers are a good option if you need a more affordable and immediately effective solution without concerns about energy costs or weather conditions. Evaluate your specific needs and consider both the initial investment and long-term savings to make the best choice for your situation.