Dear Sir | Madam,  We are an original Chinese factory who supplys qualified, high frequency online UPS 1-20 kVA, low frequency industrial 3 phase 10-200 kVA. We accept even 1 unit or OEM order, credit card or Master card payment also supported.  Our warranty might be extended to 5 years if pay extra 5% per year.  Please get back to me for more details if you are interest in.  Best Regards David Shea www.ipocasa.com Skype: davidtse410635 WhatsApp|Wechat: +86 137 2877 6531