Heating calorifier by inverter?

[DuncanHall]

I have considered something similar on my system. I believe that you have a
Victron MPPT. If you have a colour control, venus or raspbery Pi running venus you could program a relay to open depending on criteria relating to the state of charge of the batteries. If the inverter is a Victron you could make that trigger a relay also. I would look to reduce the voltage as you would get more energy out if it were taken at a lower rate due to Peukerts law.

 

[FirstAway]

I am really interested in this approach of using a voltage reducer, did you need an isolation switch to cut the supply when on shore power or is the unit OK with the back voltage?

 

[DuncanHall]

I have considered something similar on my system. I believe that you have a
Victron MPPT. If you have a colour control, venus or raspbery Pi running venus you could program a relay to open depending on criteria relating to the state of charge of the batteries. If the inverter is a Victron you could make that trigger a relay also. I would look to reduce the voltage as you would get more energy out if it were taken at a lower rate due to Peukerts law.

I have looked further into this and find it's slightly easier. I have a Victron BMV 700. It is fitted with a programmable relay. I intend to program it to switch on the immersion heater when at 100% charged and turn it off at 90% charged. I will place a voltage regulator in the immersion circuit to reduce the effective wattage of the element to reduce the load to minimise excessive battery drain. I will also fit a switch to bypass the relay for use when on shore power or generator.

 

[PaulRainbow]

I have looked further into this and find it's slightly easier. I have a Victron BMV 700. It is fitted with a programmable relay. I intend to program it to switch on the immersion heater when at 100% charged and turn it off at 90% charged. I will place a voltage regulator in the immersion circuit to reduce the effective wattage of the element to reduce the load to minimise excessive battery drain. I will also fit a switch to bypass the relay for use when on shore power or generator.

The BMV 700 relay will reliably trigger a 12v/240v relay, i use mine to control the mains charger.

 

[DuncanHall]

The BMV 700 relay will reliably trigger a 12v/240v relay, i use mine to control the mains charger.

Paul

what relay did you use?

 

[PaulRainbow]

Paul

what relay did you use?

One of these https://uk.rs-online.com/web/p/non-latching-relays/5111177/