This is a subject dear to my heart, even though I haven't got my Tesla yet...
I only have a 2Kw solar array (biggest I could fit on the roof) all North facing, with no shadowing, located in Melbourne. (Av 5 hours sun/day)
I also managed to get the PFIT (Premium Feed In Tariff) on the very last day it was available, which locks me in to a healthy minimum of 66c/Kwh for exports up to the year 2025.
Unfortunately, we are moving soon, and it will transfer to the new owner :-(
If I was staying, I have been thinking about how to balance the power generated, exported, used during peak, and used during off peak.
Average usage is around 500 to 750w per hour (24/7) - I have heaps of computers & stuff running...
Battery storage would be the logical choice (i.e. Tesla PowerWall, or even better, the Tesla itself) but, with or without, it becomes a careful balancing act.
Basically, I need a battery to charge up after 11pm, then supply power from 7am (peak start) until the sun can generate enough to start exporting, at which time the battery should be disconnected so I'm not putting my valuable 66c exports into the battery. Late afternoon (when the solar output drops), the battery then needs to power the house until 11pm when off-peak rate cuts in, then start filling the battery once more, starting the whole process over again. This would be the preferred option... Has anyone else made similar considerations ?
I only have a 2Kw solar array (biggest I could fit on the roof) all North facing, with no shadowing, located in Melbourne. (Av 5 hours sun/day)
I also managed to get the PFIT (Premium Feed In Tariff) on the very last day it was available, which locks me in to a healthy minimum of 66c/Kwh for exports up to the year 2025.
Unfortunately, we are moving soon, and it will transfer to the new owner :-(
If I was staying, I have been thinking about how to balance the power generated, exported, used during peak, and used during off peak.
Average usage is around 500 to 750w per hour (24/7) - I have heaps of computers & stuff running...
Battery storage would be the logical choice (i.e. Tesla PowerWall, or even better, the Tesla itself) but, with or without, it becomes a careful balancing act.
Basically, I need a battery to charge up after 11pm, then supply power from 7am (peak start) until the sun can generate enough to start exporting, at which time the battery should be disconnected so I'm not putting my valuable 66c exports into the battery. Late afternoon (when the solar output drops), the battery then needs to power the house until 11pm when off-peak rate cuts in, then start filling the battery once more, starting the whole process over again. This would be the preferred option... Has anyone else made similar considerations ?
