I was inquiring to Kelly Controls about a controller for my project, and they informed me that the 84V controller not available, and the 76V is now the standard.
I explained that 84 Volts was the design voltage of my system, and Kelly responded by saying I could special order an 84 V , or order a their new 120 Volt.
Just an FYI incase anyone is looking to go 96 volts or higher.
Thanks.
Mike K.