Central heating pump off 12V?

[rustic]

This is how it is. All I was proposing was unplugging from socket and plug it into the inverter instead.

Problem with this set up is that the inverter will be on 24/7 waiting for heat demand.

What current rating is the pipe thermostat?
I was thinking that the battery would go through the stat contacts, to the coil of a 12 volt relay.

The contacts of the relay would then connect the battery to the inverter, so the contacts need to be a minimum of 10 amps, in fact a car type relay should be able to do this.

The pump could then be powered directly from the inverter, no longer going through the pipe stat, and the multi stage charger would be connected directly to the mains 24/7

So every thing will be automatic even during power failures of up to say 10 hours, and when the power comes back, the battery will be charged again etc etc.

In the event of inverter failure, then you would have to unplug the pump and power it onto the mains, but this means that the pump will be on 24/7 as you have disconnected it from the pipe stat, so it might be better to buy another pipe stat for control of the 12 volt relay as mentioned above.

It is essential that all supplies are correctly fused and the appropriate sized wire is used or you might come home to a "Real fire":doh

Hope it helps,

best regards,

Rustic

 

[Peasgood1]

It is all of help, thanks.
How does this setup look then, assuming all wires are suitable and fuses fitted where appropriate ?
Stat has switch rating of 3amps at 230V.

 

[Peasgood1]

Nobody has mentioned the obvious big problem with charging batteries and solid fuel heating

 

[rustic]

It is all of help, thanks.
How does this setup look then, assuming all wires are suitable and fuses fitted where appropriate ?
Stat has switch rating of 3amps at 230V.

What are the contact rating of the stat? it has to carry the full load of the inverter, which could be 10 amps or more...?
You might need to feed a 12 volt coil of a relay with the stat, and then the N/O contacts which can carry 10 amps or more, feeding the inverter, see my earlier thread.

Nobody has mentioned the obvious big problem with charging batteries and solid fuel heating

And what is that?
Assuming you are not creating loads of explosive gasses from the battery, and the battery is in a well ventilated enclosure... You could even have the battery outside in a suitable location, but near to the fire but not at risk from sparks etc.