Icecap battery help

[LegendaryCG]

Hi folks-
I have 2 of the version 3 icecap batteries and reef octopus varios4 return. For the life of me I can’t get it to run off batteries despite it being a model listed as supported. I get pass through power if the pump power supply is on but as soon as I disconnect it I do not get power from thr battery. I’ve even checked the fuse and it looks good.

 

[P-Dub]

I'd try a voltmeter on the output terminals with the line power off and see what you get. ALSO, It says this on their site. "IMPORTANT: Not compatible with HYDROS or IceCap Dual Pump WiFi Controller" are yours WiFi controller type?

 

[MFear]

Brs lists the various pumps as compatible but all other sites including coralvue state that various pumps are not supported. Im
In the same boat as you :(