danrjones wrote: ↑
Fri Jun 12, 2020 1:54 pm
SCE has a rate comparison tool but does it let me see what NEM 2.0 would cost?
Being the tax deduction is sunsetting fast, if I want more solar, this year seems like the time to do it. How much more does NEM 2 actually cost?
I switched to TOU-a because at that time it was much cheaper than tiered. But maybe NEM 2 with a second solar system and switching back to tiered is the best option.
I can I install a 4 to 5 KW system for around 4 to 6k if I do it myself, which was the plan.
Powerwall is much more expensive. So i do not see better options?
You can't be on the tiered plan under NEM-2, it's TOU only. Another difference is the non-bypassable charges (NBCs) for grid usage, which means you pay 2-3c for every kWh you take from the grid e.g. nighttime EV charging, unlike NEM-1 these cannot be offset by credits.
Given a single meter SCE will likely force you on NEM-2 for the whole system if you add in excess of the 10% allowed by your NEM agreement but you should talk to them to make sure, who knows maybe they will let you stay on NEM-1.
The comparison tools SCE provides are primitive. If you want to understand the economics of different rates/NEM-1/2 you need to download your annual usage hourly details and model the cost using new TOU rates and NEM-2 NBCs, you can do it with Excel. Very roughly NEM-2 and new TOU rates is about 20% worse than NEM-1/TOU-D-A, in other words if you annual bill was $4,000 before solar and your system is sized well with no overproduction and you end up with $0 or close credit balance at the end of each NEM-1 period, expect the annual bill to be $800-$1000 on NEM2/new TOU.
I don't think there is a good option. Under new rates you basically have to oversize the system to fully offset your bill. SCE used to have a rule that didn't allow that, perhaps it changed. Staying on NEM-1 with your current system and switching to tiered is likely the most sensible thing you can do, maybe add 10% power to it if you can do it yourself to keep the costs low and be within the allowed increase per your NEM agreement. Bad days for solar are here.
'11 SL, totaled
-1CB@33k/21mo, -2CB@53k/33mo, -3CB@68k/41mo, -4CB(41.5AHr)@79k/49mo, -5CB(38.85AHr)@87.5k/54mo
51.1AHr, SOH 80%, 150k miles