620 liters.
Solar energy generally ranges from 80 to 620 liters. The solar water heater is a device that converts solar energy into thermal energy, changing water from a low temperature to a high temperature. To meet the hot water consumption in people's daily lives. The conversion of solar energy into thermal energy mainly relies on vacuum collector tubes, which use the principle of hot water rising and cold water falling to create microcirculation in the water, making so hot water.
The larger the capacity of the water heater, the better you should choose the capacity according to your personal needs.
For solar energy, bigger is not always better. First, the larger the capacity, the higher the price. Second, if the capacity is too large, it won't be able to use as much heat. water every day. It is also a gaspillage, so the choice of solar energy should be based on the actual usage, such as the purpose of using hot water, the number of people using it, etc. for bathing and washing face, 30 ~ 40 L/person is enough (select according to personal bathing conditions). If there is a bathtub, etc., it is recommended to choose 50L. If you still want to use solar hot water in winter. for washing vegetables, dishes, clothes, etc. will be a little bigger!