EVBoiler - operational diagram – stepping connection of multiple DC water heaters

Stepping connection of the EVBoiler heaters allows to heat a bigger volume of water in multiple heaters. The energy from the solar panels goes to the first heater (1). After the target temperature is reached, the DC circuit will switch from heating to redirecting to the DC output. At the DC output another EVBoiler heater (2) is connected. The second water heater will start heating only when the first one has reached the full temperature.

This solution may be useful:
A) in summer when there is a lot of solar energy from sunshine. It allows to have an extra supply of hot water – for example to pre-warm swimming pool or simply for more enjoyment of life during bathing.
B) In places with multiple bathrooms – in sunny days the hot water will be available in multiple bathrooms from the direct DC power.
C) for water preheating – the second EVBoiler may be used as a water preheating – this way the temperature loss of the first heather will be much lower.
D) floor-heating – the second EVBoiler may be used for floor heating warm water. After the hot water for washing (1) is fully warm, the surplus energy may be used for floor heating water (2). This may be useful in some houses where there is a large basement and even in summer there is possibility to warm these spaces by surplus heat from DC power.