What are everyone's thoughts on the Tesla Powerwall? Looks like people are really starting to see the cost benefits of these units and it looks like the ROI isn't anywhere near the originally predicted 20 years.
I would definetely enjoy my power bill only be $178 a year!
Good topic @maknilsin.
I am also keen to read what other Workshop members think about investing in this technology.
One consideration that I've not seen many people make is the opportunity cost of the initial investment in solar and the batteries. That is, what you would save if you put that money into reducing your mortgage.
You might also find this Workshop discussion of interest - Reducing your power bill
I was very excited when I first saw the Tesla Powerwall. I want to install solar panels on the roof and get some batteries that can store the electricity we would generate. I reckon that one day it will be feasible to go off the grid altogether. I really hope these battery systems become widely available and affordable soon.
@Isobel if you know what your energy usage is you can calculate how many panels you need to go off grid and check if you have the space to put the panels up.
In my case the answer is I run out of roof space, also makes battery storage a moot point for the house.
Tesla not being an option for me and I want to do some small scale things like a garden shed for the outdoor tools I can use Gel Deep Cycle Batteries, not as trendy but you can scale it to your needs.
You can start calculating at a US site.
@Brad We also installed a solar hot water system about a decade ago and it certainly paid for itself.
I guess the main problem with any of the calculations is that you don't know what the price of electricity is going to be in the future. The only guarantee is that it will be more expensive!
Another consideration: I noticed a television advertisement last night for a new home that explicitly called out the addition of solar panels and a Tesla Powerwall. I imagine it will be a very attractive inclusion to those looking to buy a home that could help re-sale.
Timely article, but short on actual data - https://www.domain.com.au/news/is-it-really-worth-getting-solar-panels-to-reduce-the-cost-of-future-...
. I do like the idea that you will have power available during blackouts if you have battery storage.
You also need an isolator switch so power can't go to the grid and the grid shut your power down, just a little something they forget to mention in the race for low price advertising.
Facts on battery life seem to be missing leaving educated guesses based on similar batteries with 100 and 80% drain.
Some light reading...
Comments may do your head in.