Enphase Battery information

[paul65k]

As long as you are in NEM 1.0 in Calif, I think everywhere is the same right ? Sell and buy as retail rate. Why SCE is different ?
Plus NEM 1.0 is locked for 20 years right.


I see many states have better plan than California. I do not hear anyone complains that they sell with lower rate than buying as of now.

Future I do not know...

NEM 1 IS buy and sell at same rate....as I stated in my post, however this expires sometime next year and the follow-on program in as yet undefined. In AZ they have petitioned the state to allow buy at wholesale and sell at retail.....IMO it's only a matter of opinion until we get there. In my case I have a 20 year commitment for NEM1 but..........this if course can always change

[solar_newbie]

I think your conclusion is correct as long as the current CA net metering scheme is in place.....namely selling power back to the Power company at retail (day or night rates) vs. what certainly looks to be the future (and current in some places already) where the PoCo buys from the homeowner at their overall wholesale rate and selling it back to you at retail.......at SCE that current number is around $.035 vs buying at anywhere from .16-.32 per KWh.........makes solar a little less attractive on a net metering basis and at some point COULD make batteries look attractive.....but not until there is some serious technology improvements that drive down the cost per KWh on Batteries.

As long as you are in NEM 1.0 in Calif, I think everywhere is the same right ? Sell and buy as retail rate. Why SCE is different ?
Plus NEM 1.0 is locked for 20 years right.


I see many states have better plan than California. I do not hear anyone complains that they sell with lower rate than buying as of now.

Future I do not know...

[lkruper]

I think your conclusion is correct as long as the current CA net metering scheme is in place.....namely selling power back to the Power company at retail (day or night rates) vs. what certainly looks to be the future (and current in some places already) where the PoCo buys from the homeowner at their overall wholesale rate and selling it back to you at retail.......at SCE that current number is around $.035 vs buying at anywhere from .16-.32 per KWh.........makes solar a little less attractive on a net metering basis and at some point COULD make batteries look attractive.....but not until there is some serious technology improvements that drive down the cost per KWh on Batteries.

Costco golf car batteries cost 11.09 cents / kWh delivered during their lifetime and $67.62 per kWh stored. How low do batteries need to go to make batteries look attractive?

[paul65k]

Have anyone had more info about enphase battery ? I see it is more usefully vs Tesla power wall.

For Tesla, you must have solar and feed DC power from solar during the day to charge the battery and use it during the night. It is stupid it is 1-1 convert. If I sell my power during the day to power company and buy back during the night, I got 2X - 3X benefit.

What the best is to buy power during the night and use during the day. Sell everything solar generate during the night. So my value from solar increase 2-3 times

I am not sure if I could control Enphase AC battery to charge during the night and supply during the day or not?

For example with 5KW system, it can generate around 22KWH per day. If I use 12kwh during day time and 20kwh during night time. I virtually can sell 10Kwh to get 20kwh credit for night time to use (Assume 2x credit different in TOU)
Now, if I have 12kwh smart AC battery, I will move all my usage to night time of 32kwh. Charge the 12kwh battery at night and use during day time. Solar power will put back to the grid during day time to get 44kwh credit. So I get 12 extra kWh for any extra things to use.

If I use 10 kWh tesla powerwall, I will end up to pay 10kwh more for my night usage as I get zero credit from Power company
If I use 20 kWh tesla Powerwall, I end up to pay 10kwh day cost which is equal to 20kwh night cost.

I do not see any benefit to have solar edge and tesla power wall for Us where net meter is provided.
What do you guys think?

I think your conclusion is correct as long as the current CA net metering scheme is in place.....namely selling power back to the Power company at retail (day or night rates) vs. what certainly looks to be the future (and current in some places already) where the PoCo buys from the homeowner at their overall wholesale rate and selling it back to you at retail.......at SCE that current number is around $.035 vs buying at anywhere from .16-.32 per KWh.........makes solar a little less attractive on a net metering basis and at some point COULD make batteries look attractive.....but not until there is some serious technology improvements that drive down the cost per KWh on Batteries.

[inetdog]

Not going into the details of your analysis, I agree with your conclusion. Net Metering is cheaper than any battery could ever be.

[solar_newbie]

Have anyone had more info about enphase battery ? I see it is more usefully vs Tesla power wall.

For Tesla, you must have solar and feed DC power from solar during the day to charge the battery and use it during the night. It is stupid it is 1-1 convert. If I sell my power during the day to power company and buy back during the night, I got 2X - 3X benefit.

What the best is to buy power during the night and use during the day. Sell everything solar generate during the night. So my value from solar increase 2-3 times

I am not sure if I could control Enphase AC battery to charge during the night and supply during the day or not?

For example with 5KW system, it can generate around 22KWH per day. If I use 12kwh during day time and 20kwh during night time. I virtually can sell 10Kwh to get 20kwh credit for night time to use (Assume 2x credit different in TOU)
Now, if I have 12kwh smart AC battery, I will move all my usage to night time of 32kwh. Charge the 12kwh battery at night and use during day time. Solar power will put back to the grid during day time to get 44kwh credit. So I get 12 extra kWh for any extra things to use.

If I use 10 kWh tesla powerwall, I will end up to pay 10kwh more for my night usage as I get zero credit from Power company
If I use 20 kWh tesla Powerwall, I end up to pay 10kwh day cost which is equal to 20kwh night cost.

I do not see any benefit to have solar edge and tesla power wall for Us where net meter is provided.
What do you guys think?