Off peak tariff battery storage charging

[LWS_Electrical]

Customer has battery storage charged from solar panels and off peak supply. Should I be getting a 230v shock from the off peak cable when it's disconnected from the off peak DB? I would of thought there would be a diode to prevent 230v from the battery or solar panels from interacting with the off peak board. I fitted some Quantum storage heaters on a new off peak RCD board, got a significant tingle from the battery charging cable and the off peak board RCD won't stay on. Has the contactor (MCGMC3402NO2NC) been wired incorrectly? I can supply photos if it helps. Thanks

 

[snowhead]

So the battery storage charges from the Off Peak board, then discharges to Day /Normal rate Board?
It must have connections to both Boards.

Did you fully isolate the Battery system before you disconnected it?

Were there any warning labels about isolation?

 

[buzzlightyear]

no rotary switch then.

 

[Strima]

No safe isolation process then?

 

[buzzlightyear]

about solar photo systems .