I’m received my quote from Tesla (medium size with 2 PWs) which they say would power the whole home.
For those with similar sized systems, did you guys go with full home or partial? I’m thinking partial just to save the $10000 and maybe down the road purchase a second one if needed.
My PGE application estimated I’d be -2,511 kWh short of my estimated yearly usage. Anyone know how accurate these estimates are? Do they tend to lean more one way than the other?
when people get solar, they tend to start using more power. If you are already thinking you might want the 2nd powerwall, you should get it now.
The second powerwall is not an additional 10k, NOW. I know powerwall pricing (from tesla at least) very well because I am in process of purchasing 2 of them from tesla (in waiting for permit stage).
From tesla, powerwalls are:
1 powerwall
Powerwall = 6500
Install = 3000
Permits = 500
Gateway = 1100
=11,100
Taxes applicable to your state / county
The second powerwall adds 6500 for the powerwall and SUBTRACTS 500 from the installation, meaning the second powerwall is 6000 (not 10k) more. Again, pricing from tesla. Third party pricing is different and all over the map, without breaking everything out.
If I were in your shoes, I would ask for a re desgin (in fact I did, when I was getting solar in 2015 from tesla). they originally sized me for 80% of my yearly usage, and I made them upsize the system to 98% of my yearly usage. I didnt have an EV at the time but told them "I am getting one next year". I didnt end up getting it the next year, but 3 years later. Anyway.
I would go with whole home backup, and 2 powerwalls (whole home except for backing up the charging circuit for the EV). My plan on that is, if we have a multi day outage, I will just drive my car to a local supercharger. Makes no sense to me to charge my 75kW car with my soon to be 27kW of battery. If my car was about to be dead, I would just plug it in on 120 to get enough charge to get to a supercharger.
Anyway, I am planning on backing up everything except my EV circuit. I have 2 air conditioning units, and asked tesla to connect them on the backup side and was told "engineering signed off on that". When the electricians actually come, I will check in with them. I live inland so its hot during the summer, and it would be nice to be able to run the AC just briefly (30 minutes) to reduce heat if we were in a power outage.
Anyway, sorry for rambling on. I would have tesla resize that system to come much closer to my yearly usage, and I would get 2 powerwalls.. but I am not a fan of "I wish I would have gotten....." (the bigger TV, the faster car, the more powerful AV receiver, the larger Solar / powerwall). In my mind, its MUCH easier to not use some capacity you have, than add it later.... provided one has the finances to get the larger / more powerful thing.
If finances are an issue, then its better to have some solar and backup than none. My system is leased (unfortunately) because in 2015 I could not afford to buy it, but my calculations showed me even leased solar was going to save me $100 a month on electricity on average. I am going to buy it from tesla next year when I can, and am glad I jumped in when I did. Its just frustrating to have this solar on my home and still be without power in a power outage, which has happened to me and suuuckkkks... lol