Tim_btt
Member
So exciting.come on Tesla people, nearly there....
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So exciting.come on Tesla people, nearly there....
Week++plus "qa cycle" which of course could be week+
Have you called config/completed after this? If not, changing the mode does stop the powerwall. I assume you have (and you get 202 accepted), but just in case, I thought I'd mention it.PS. switching to backup with <100% reserve (even if it is higher than current level) seems to have equivalent effect to stop button
It would qualify for SGIP. SGIP requirement is only that you store energy (i.e. store/generate energy)--hence the requirement to cycle the battery x number of times or x about of kw in a year. ITC is the one that requires you to only charge from solar.
I believe if I was able to charge from the grid, the TOU arbitrage benefit would be greater than the ITC benefit.
Really a function of your usage but if you simply take the number of hours you use for peak and non peak and multiply by the difference relative to non peak hours , that is how much you’re saving per year if you could charge from the grid. And the benefit is not a one time but over multiple years. The benefit is obviously much less if you cannot charge from the grid. My estimation was that I could save $5-600 per year. So after 3.5 years, the TOU benefit would outstrip the ITC benefit ( not counting time value of money).I’ve been trying to do the math on this but the ITC benefit seems to be pretty large compared to the TOU benefit. Can you walk me through your calcs?
One would hope, especially in California. As Miimura has mentioned there have been programs for getting paid in a lower rate or some incentive to allow the utility to turn off your AC when the grid is stressed. I have not been able to take advantage of those because I have always lived in a little beach community where we didnt need AC. Recently we purchased a second home in Sonoma Clean Power's territory and I just enrolled in their GridSavvy program which allows them to control my EVSE. I have installed solar at that home and have a Powerall on order. The solar will be on NEM 2.O so I am also hopeful that over the next five years these DER programs will continue to evolve and provide greater returns on my investment.Of course by then they might also have implemented their grid stabilization program which would hopefully pay more than the arbitrage.
SGIP also requires 75% annual charge from solar, if you have on-site PV. That makes TOU arbitrage with grid-charging difficult to manage.It would qualify for SGIP. SGIP requirement is only that you store energy (i.e. store/generate energy)--hence the requirement to cycle the battery x number of times or x about of kw in a year. ITC is the one that requires you to only charge from solar.
I believe if I was able to charge from the grid, the TOU arbitrage benefit would be greater than the ITC benefit.
From the 2017 SGIP Handbook Version 6:SGIP also requires 75% annual charge from solar, if you have on-site PV. That makes TOU arbitrage with grid-charging difficult to manage.
5.3.4 Paired with On-site Renewables
To be considered paired with and charging from on-site renewables, energy storage systems must either be claiming the Investment Tax Credit (ITC) or, if not claiming the ITC, charge a minimum of 75% from the on-site renewable generator.
So you're saying it's possible to have "unpaired" storage If one is taking SGIP rebate and there's a on-site renewable generator? How does SGIP allow that when the mandate of the rebate is to encourage renewable uptake?So if you are not taking the ITC, you can choose not to commit to charging 75% from the on-site renewable generator, and the SGIP will not consider your energy storage system paired with the on-site renewables.
ok i just defined commands "charge" = backup/100, "discharge"=self_consumption/10, "standby"="self_consumption/100", keeping around start and stop as well although standby now should take care of "stop all activities, outage backup only" behavior. The rest should be a matter of putting that into crontab if one has 24x7 unix-based device around.. i might be able to push it to synology, although the model i have is too old to have java installed it seems... if not i will try to get it into roqos router which should be a fully capable debian flavor... I still don't get what the real reason for withholding this functionality could be... it is required for SGIP if not approval, then inspection i gather. How am I supposed to demonstrate i can discharge the PW to a SGIP inspector??? they can't be THAT short-handed... or incompetent... or be out of spec with grid or something... I am not sure what is worse...Week++
Have you called config/completed after this? If not, changing the mode does stop the powerwall. I assume you have (and you get 202 accepted), but just in case, I thought I'd mention it.
Per the handbook's definition:SGIP for energy storage would be available if you didn't have solar, so why should the program requirements be stricter if you do have solar?
Cheers, Wayne
Otherwise, why would anybody choose paired with its more stringent requirements?Paired: Two or more technologies located on the same electrical circuit and behind the same utility electrical meter.
75% minimum.Systems Pairing with On-site Renewable Generators:
Energy storage systems paired with on-site renewable generators must provide a description of:
• The anticipated charge and discharge schedule of the system demonstrating that the system complies with ITC operational requirements or, for projects not claiming the ITC, will be charged at least 75% from renewables;
Energy Storage Paired with and Charging from an On-site Renewable Generator: Energy storage system that is paired with an on-site generator and charges at a minimum 75% from the generator
Precisely, there's no reason to choose to. [But if you are claiming the ITC, then SGIP forces you to apply as paired storage.] Unless you want priority in the event of a lottery, that is the one benefit I could find. Those who applied in Step 1 as paired storage are presumably glad they did so, since Step 1 had a lottery.Otherwise, why would anybody choose paired with its more stringent requirements?
ok i just defined commands "charge" = backup/100, "discharge"=self_consumption/10, "standby"="self_consumption/100",
Is there any difference between "charge" and "standby?" I'm using self_consumption/50 and self_consumption/100 as the two states and it will still charge at self_consumption/100, albeit only at 1.7 kW per Powerwall. There was a post saying that backup/90 would turn off the Powerwall, but I haven't played with that yet.
Ah ok, without solar it would make sense that you wouldn't charge when you're above your reserve. Ironically, with solar you would charge faster if you're above your reserve if the solar is producing over 3.4 kW.note thats' without solar. Not sure about stuff with solar.