I’m in Australia and am looking to optimize my Powerwall 2 settings. I’m specifically looking for software or an app that can enable smarter charging.
We’re coming out of winter so my solar output (4.2kW system) is increasing. I’m with an electricity retailer (Amber) that offers a variable tariff based on time of use and the market wholesale price. Over the past few months I’ve seen the 30 minute price I pay for electricity vary from 0 up to $8/kWhr. However, the 10 month average price I’ve paid is 14c/kWhr. Typically the prices I pay hover around 10-20c during the day, increase to 25-30c between 4pm and midnight and then drop back to around 10-15c overnight. As such, over winter, I’ve had my Powerwall set to cost savings with my peak set at 4pm-12.30pm and off peak set to 2am-6am. On a good day, the PW will charge overnight, then, during the day, I can run off solar and make it through to 4pm with the PW at 100%. From 4pm onwards I just run off the PW. Therefore the only power I take from the grid is at the cheapest prices (2am-6am).
However, with the days getting sunnier I’m increasingly generating more power during the day than I need and it’s going back into the grid. The time of use tariffs I’m on apply to exports too. Today, a very sunny day with lots of renewables in the grid, the solar export price actually went negative - I was being charged to export power.
As shown in the image, last night I took 10.9kWhr from the grid to charge the battery. But during the day I put 8.2kWhr back into the grid. Ideally, I should have only partially charged the PW last night and then used the solar to top it up during the day.
I knew today was going to be sunny and could’ve predicted that I only needed a partial charge of the PW. It’s going to rain and be colder tomorrow so tonight I would like to fully charge the PW.
My question then is, how can optimize this? Is there any software or app I can run to give me more control over the PW?
We’re coming out of winter so my solar output (4.2kW system) is increasing. I’m with an electricity retailer (Amber) that offers a variable tariff based on time of use and the market wholesale price. Over the past few months I’ve seen the 30 minute price I pay for electricity vary from 0 up to $8/kWhr. However, the 10 month average price I’ve paid is 14c/kWhr. Typically the prices I pay hover around 10-20c during the day, increase to 25-30c between 4pm and midnight and then drop back to around 10-15c overnight. As such, over winter, I’ve had my Powerwall set to cost savings with my peak set at 4pm-12.30pm and off peak set to 2am-6am. On a good day, the PW will charge overnight, then, during the day, I can run off solar and make it through to 4pm with the PW at 100%. From 4pm onwards I just run off the PW. Therefore the only power I take from the grid is at the cheapest prices (2am-6am).
However, with the days getting sunnier I’m increasingly generating more power during the day than I need and it’s going back into the grid. The time of use tariffs I’m on apply to exports too. Today, a very sunny day with lots of renewables in the grid, the solar export price actually went negative - I was being charged to export power.
As shown in the image, last night I took 10.9kWhr from the grid to charge the battery. But during the day I put 8.2kWhr back into the grid. Ideally, I should have only partially charged the PW last night and then used the solar to top it up during the day.
I knew today was going to be sunny and could’ve predicted that I only needed a partial charge of the PW. It’s going to rain and be colder tomorrow so tonight I would like to fully charge the PW.
My question then is, how can optimize this? Is there any software or app I can run to give me more control over the PW?