Hi I have a powerwall 2 installed and overall I am happy with the performance. I would like to connect a generator to my system. Tesla representative advised me that this is not possible at present and suggested to upgrade to the new gateway with the backup option. This does not make any sense to me because of the cost( is £2k for something that I will probably never use) and the fact that if there is no solar available the system will not work anyway. I would like to have the option to connect a portable generator to my system. Can anyone advise of how to connect the generator safely( through a transfer switch?) and if this affects the battery at all? Thanks.