Inverter Question

[Chrisvh]

Another question from a seriously electronically challenged forum member.

I have an inverter connected to two dedicated sockets in the kitchen area. These sockets are isolated from the EHU circuit. Only used for running coffee machines and other appliances and occasional Ebike battery charging. For convenience we tend to use the sockets, and inverter, when on EHU. I am aware this is not efficient but it works for us. When the sockets are not in use there is no draw on the batteries.

My question relates to leaving the inverter switched on. Is there a reason why the inverter should not be left switched on while on EHU? Particularly any safety issues?

I hope that makes sense. I just want to avoid any potential safety issues of having an inverter switched on while on EHU

 

[Richard n Ann]

12v devices are usually tolerant of charging voltages. Does the inverter specification give maximum input voltage?

 

[Chrisvh]

It gives
DC input 12v (10-15V) or 24V (21-30V)
AC input 170-250V (220V) or 70-150V (110V)

 

[NicM]

It gives
DC input 12v (10-15V) or 24V (21-30V)
AC input 170-250V (220V) or 70-150V (110V)

Then it will be fine just left on, charge voltage will not be over 15 volts.

 

[autorouter]

AC input 170-250V (220V) or 70-150V (110V)

Your original questions have been answered, but I have a further question. Is that right, when it says 'AC input'?

I'm asking because many inverters have an auto changeover switch built in. You can connect the EHU mains to it, permanently if you want. When on EHU, it automatically switches the output sockets over to the EHU supply, and doesn't use the inverter. It would be a simple wiring connection for someone who knew what they were doing. If you are often on EHU it might be worth considering.

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[Rob Turner]

As mentioned, a lot of Waeco/Dometic inverters have a mains priority circuit built in.

 

[Richard n Ann]

Your original questions have been answered, but I have a further question. Is that right, when it says 'AC input'?

I'm asking because many inverters have an auto changeover switch built in. You can connect the EHU mains to it, permanently if you want. When on EHU, it automatically switches the output sockets over to the EHU supply, and doesn't use the inverter. It would be a simple wiring connection for someone who knew what they were doing. If you are often on EHU it might be worth considering.

Some are battery chargers too, our 1000w Chinese one has a mains input for charging the battery, never used it.

 

[cyberyacht]

irrespective of if you are on mains, there is always a residual draw on the battery whether you have appliances using the 240v sockets fed by it or not. Always best to turn it off when not being used.

 

[Chrisvh]

Many thanks for the info. Much appreciated.

 

[Stealaway]

I have one of these to turn it off every night

UK Universal 12V Battery Isolator Switch Cut Off Switch for Car Boat Van Truck | eBay

1 Car Battery Isolator Disconnect Cut OFF Power Kill Switch. Can also cut off power on racing cars & prevent fire. Easy to use, simply remove the red removable key to dissconnect the battery. 3 positions: On, Off and turn fully anti-clockwise to unlock key.

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