Back in July I posted about changing the application that sits on my server to collect data from around the house and send it to Splunk. That app has been sending data for over 8 months now and during the winter we noticed that the Powerwall was consuming data from the grid nearly every night, yet not charging the battery above the reserved 5% mark.
I contacted Tesla to find out what was happening as these events were quite frequent in the winder months. Their response was that they were “low state of energy” or also known as “emergency grid charging events”. In the below graphs each of the orange spikes below the zero line and with a corresponding spike in the blue line at the same time period represents one of these low state of energy events.
Tesla offered some options on how to reduce the number of these low state of energy events but for the time being we’ve decided to leave the settings as is because the summer months are on the way and the number of low state of energy events has already started to reduce.
It’s been just over 5 months since we had our Tesla Powerwall installed and I thought I’d give an early update on the difference it’s made to our grid consumption so far. It is still early days and I will provide another update once I have a few more readings – probably late next year.
Our electricity billing periods are:
Our Tesla Powerwall was installed on June 1st 2018, which means the July bill should have showed some difference in kWh grid consumption (especially given the lovely summer we had this year!) even though it was a partial month of having the Powerwall, whereas the October bill was a complete month of having the Powerwall in operation.
I think the graph says it all! Even on the July bill, we saved 266* kWh or a 37.5% drop and on the October bill we saved a massive 560* kWh or 70.3% drop!
I just wish we’d had the battery installed 6 weeks earlier to benefit even more from the fantastic summer weather we had this year! 🙂
* based on the average of units consumed 2013 to 2017
In my post about ordering a home car charger I mentioned that I was using the same electricians to install the charger at the same time as they install another product that I’m super excited about – well I’ve order a Tesla Powerwall!!
When I picked up my car from the dealer, he said to me “you excited to pick up your new car?” my response… “well not really…” But when it comes to a Tesla Powerwall 😀 I couldn’t be more excited!
I’ve got a few more weeks to wait until it’ll be delivered and fitted as I’m waiting for a DNO approval to fit the battery, but hopefully it’ll be up and running in time for the summer.