Hi @David_AGL I have studied the bills, and I still cannot understand why there's a massive difference. If anything, I expected the most recent bill to be dearer as I've been using the air conditioner sporadically. I didn't use heating, and I'm still at home during similar periods of time. No appliances have been replaced or added since my power was connected. The live chat feature is unavailable. I called AGL, but I think there was a language barrier with who I have spoken to. The only reasona ...