I am using su-kam inverter from 4 years. I think that this is best inverter which ever I used. The name su-kam is enough. Su-kam 650 VA is provided with exhaust fan to make the inverter cool so that it does not burn.
Within 4 years it never created any problem and is working efficiently. As it does not required for me to call service so I can’t tell about it but on asking shopkeeper , he told me that within 24 hours they will attend the call and provide stand-by solution.
In India mostly people by things seeing advertisement, due to less advertisement it can’t able to make its market.