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Anyone have any experience with economy tariffs for hot water system in particular (or any other bigger power usage items)?
- Do you get much of any savings on your energy bill?
- Any pitfalls I should look out for?
- Is this worth looking into before getting a home battery installed?
Any insights would be great, thanks.
If you’re looking at batteries, I assume that means you have solar? In that case, it would be better to run your hot water when it’s peak solar time (10am to 2pm is about the biggest window you can expect) because then it’s free which is a better dollar value than any tariff… isn’t it?
That makes way more sense. So getting a timer installed for the hot water system would be way better. Do you know if that is something I can ask a sparky to do, or is it a bit more involved than that? Pretty sure my system doesn’t have a timer already.
A basic 1 pole timer is the cheapest and easiest. A Hager DIN mount EHN011 is a 24 hour analogue timer with battery backup that’ll do 16A and will set you back about $75+GST. Or you can go with a cheap Tesla (no relation, I dont think) SUL180A or similar brand which will be more like $50+GST. An hour of a sparkies time will be more than enough to install one assuming you have a free pole left in your board.
The “better” way is to use a smart relay connected to your inverter. It gets programmed to only switch on when the inverter is exporting more than the hot water system will draw - i.e. if you have a 3.6kw element in your hot water system, it would be programmed to only turn on if you’re exporting >4kw. That covers you against cloudy days, and will turn the hot water system off if something like your AC or stove or whatever turns on to make sure your usage is always 100% covered by solar. Not all inverters support this, and the cost of installing it will be higher so you may not make back the difference in cost on the extra power you pay on the edge cases that a basic timer can’t protect against.
Also sometimes people will swap out the 3.6kw element for a 1.5kw element. This means the hot water system stays running longer, but draws less power so it is more guaranteed to stay below solar export. Not worth the cost of doing if everything is working fine, but if your element fails and you have the choice its not a bad idea to swap.
I’ve swapped to OVO on their EV plan, and they give a 3 hour window in the middle of the day (11am to 2pm) of free power. I changed our timer to only run between 11:30am and 1:30pm which with a 3.6kw element is plenty of time to get the water toastie again. That way I dont have to worry about smart meters, or cloudy days, or anything! Its always free!
Thank you so much, all this information has been extremely helpful.
Lure coursing day! Puppies about to go running and hopefully have a lovely time
It’s that the one where they chase the… lure lol? Zippy fun times for them??
That’s the one! Back in the day they’d chase hares or rabbits, then they changed to lures which were bags of meat dragged by hand along a long course, now it’s plastic bags on a string rustling through the grass pulled by a motor (electric in this case, petrol at the other one we go to).
Ah right, that’s awesome, did the doggos have the best time??
Then were certainly happy puppies!
Someone was taking photos with a fancy looking camera so some action photos will appear at some point.
Hahaha man, that is def one happy looking doggo!!
