[quote=LAAFTERHOURS]Can we resurface this thread? Trying to decide on plans and have no idea which to go with. My deciding factors:
20 panel Solar array with Net metering.
Tesla.
Work from home.
Spouse may work from home as well.[/quote]
If you already have a system:
With EV TOU5 rate of 9 cents per kWh at night, all charging should be done then for the EV. (FYI: we have a Model S and Model 3)
If you are planning as sytem:
Any solar you put in would be strictly for AC in the summer and any peak and off peak use. Don’t worry about covering the EV charging (super off peak) as that will be about cost neutral.
Even then I’d target 80% of expected use as some years are cooler and then you can ensure 100% utilization as overproduction only gets 4 cents per kWh.
If you pick a vendor who can add panels, then you can add more if you needs change. Just get a larger inverter. I’ve put solar on my home and 4 rentals. Usage patterns change, it’s easy to get excited and buy too much.
If you know you need AC all the time, you can go for more.
I’ve found except when it’s humid, a 2K whole house fan can get the temp down int the mid 60s in the house even now. On balance I’d rather spend 2K on the fan than the last 20% of panels to get to 100% of usage.
Background: I’ve modeled solar installs for a few midsized companies. Did some consulting for Sempra a few years ago too.
