Using inverters (see http://www.inverter.co ) that come from a small producer, or a producer that only assembles and has not made investments in the production chain is a very risky solution.

why don't you contact them directly? most inverter producers will sell you directly any amount, and those that won't will sell you based on a minimum quantity (100KW).

Furthermore, if a producer has HQ in the Far East, their warranty is based on local laws and if you have a problem you will be chasing them in china, in a chinese court, in chinese. Some solar inverter companies have performance...