Different products come with varying capacities nowadays. You must choose the right one according to your specific needs. Do you have a nuclear family? If you have 4 or 5 members in your family, you can choose a tank with a reasonable capacity. You can opt for an electric water heater with a 25-litre tank capacity. Large families should opt for water heaters with higher water storage capacity. Be mindful about your requirements and choose the right size based on these needs.