First, I should emphasize where to find genuine manuals. Official websites like the manufacturer's or distributor's sites are the best sources. Users might be searching online for quick access, but pirated copies could be a problem. I should warn against that and suggest legal sources.
Check the "Product Guides and Documents" section on the Amazon or eBay page where it was purchased. Generic Manual Archives: Sites like ManualsLib Manual-Hub often host JTE PDFs under "Power Inverters." Contact Support: Jte Inverter Manual Pdf