I just heard on the jungle grapevine that the govt or the power suppliers might put a monetary tax or other 'fine' on the installation, use or ownership of power storage batteries. So just when they have us all brainwashed into thinking we need our own off grid systems so we can protect ourselves from the ever increasing outages & power costs, they come along & tax those very installations. I remember the same thing happening when the banks changed us over from over the counter transaction to ATMs which were free. Then the fees made an appearance. OH & here's another thing....... Those of us who have gone out & got cheaper electricity charges are in for a shock in the coming summer. Apparently, buried deep in the extra fine, fine print of those cheap tariffs is a reference to being able to throttle your power should you use too much at certain times of the day. I stress 'the day' because it all relates to the use of air conditioners. If you have a cheap tariff you will either have to change to another tariff that allows the use of aircon or face throttling if there isn't enough power to run your area. We have smart meters to thank for all these new taxes. Of course aircon will be available for use at night time probably after midnight! And yes there will be the occasional time when it will come in handy but think about the fact that most others in your neighbourhood will also be thinking the very same thing, & bingo you have a power shortage again, so yours will be throttled then too. I'm in the process of designing a completely off grid aircon system. I'm planning to use caravan aircon units powered by some panels. One in the bedroom will have the ability to be plugged in to 240v much like a caravan unit can be. My power bill is not that big but if I added aircon it would sky rocket, hence the off grid unit system. In my area it does not make sense to have a full solar power system because the storage batteries are still too expensive. I would still have to pay the exorbitant 'daily supply charge' which constitutes aprox one third to one half of my bill because I have to run water pumps at night time.