Inverter noise

[Happycampers1]

I have just fitted a 1500/3000w pure sine inverter to my leisure battery and it works fine except for a high pitched whine after a few minutes. Any ideas?

 

[gozomike]

That usually indicates the voltage going into the inverter is too low. How thick & long are the cables??

 

[hilldweller]

it works fine except for a high pitched whine after a few minutes. Any ideas?

On full load it could flatten a battery in that time.

 

[Daifuse]

That usually indicates the voltage going into the inverter is too low. How thick & long are the cables??

Or your battery has a duff cell .......

 

[34127]

Inverters work at high frequency and sometimes can sound noisy. It is usually caused by the transformer windings if they have not been properly encapsulated or if the transformer housings are not securely fixed to pcb or chassis of equipment.

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[pappajohn]

Agreed with gozomike.

Once the voltage drops below a preset level the low voltage alarm will sound.

The higher the load via the inverter, the lower the available voltage regardless of the batteries off load voltage.

 

[gozomike]

Inverters work at high frequency

Correct - that frequency is above that we can hear, once the voltage drops the frequency will drop to a frequency we can hear hence the sound we get.

 

[Gizmouk]

I have just fitted a 1500/3000w pure sine inverter to my leisure battery and it works fine except for a high pitched whine after a few minutes. Any ideas?

Let the wife back in out of the cold ?

 

[Happycampers1]

Checked the wife! Damn you are good!

 

[JeanLuc]

To return to the original question from gozomike, how long and thick are the cables between inverter and battery(ies)? Also, what load are you drawing from the inverter (in watts) and how big is/are your leisure battery(ies)?

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[makems]

Some inverters have a fan to cool them when under heavy load (ours does) could this be the source of the whining noise?

 

[Happycampers1]

Thanks guys. The leisure battery is new "apparently" but as it is under warranty the dealer is going to replace it. The cables are the correct size and only about 12" long. I think it must be a low voltage issue as it is fine when the engine is running.

 

[davejen]

Or, maybe there's a mouse inside?
Cheers, Dave