1kw Lalea Inverter

I purchased Lalela inverter 1kw from Incredible connections (13k). The inverter is extremely noisy when charging (actually deafening). When I returned the unit as no-one told me the intensity of the charging battery, Lalela advised the sales agent said that is the noise it makes! After a fight I was refunded my money but less R1 000 as the box was not in the state I received it. Extremely difficult to remove a heavy unit without box damage. Wouldn't buy Lalela products again