generator help

[james_xray]

Hi all,
I have got a small 2 stroke generator 720watts and I use it to power my 12 volt power supply which takes about 350watts to then power my chargers

The problem i have is that the output voltage is not as stable as I would like which in turn then upsets the 12v power supply and my chargers.

Has anyone had a similar issue and can I get a 230v ac filter or something to refine the generator output.

Thanks in advance
James