This topic was kind of buried in a recent thread about the Federal Investment Tax Credit (ITC)... so I'm forking it here.
It's fairly well publicized that the ITC is decreasing over the next few years. What's less well known is that the California Public Utilities Commission (CPUC) is making progress around the rules for how California utilities can set energy rates that Solar customers have to pay under Net Energy Metering 3.0 (NEM 3.0).
NEM 3.0 is expected to come into effect for new California PV installs in early 2021. This change to California retail energy rate policy plus the reduction to the investment tax credit makes Solar much less attractive in the coming months versus today.
NEM 3.0 is a bit of a misnomer; for retail customers it is not a forward progression compared to NEM 2.0. NEM 3.0 as it currently exists removes many of the previous protections that prevented a California Utility from significantly arbitraging the difference between daytime production versus high demand time when the sun has set.
Under NEM 2.0 we saw peak rates starting in the afternoon when the sunlight would be available. Under NEM 3.0, it's completely within the Utility's right to decrease the NEM rate during the afternoon and dramatically increase the NEM rate at dusk. This lowers the value of the energy generated by solar, and increases the cost of energy used during peak times after sunset.
This means future solar-only customers will experience much worse net-rates than what previous and current new solar installations have seen over the last few years. This would basically necessitate the installation of batteries to allow a homeowner to individually distribute their own clean energy storage and use during a day/night cycle.
The general root cause of this that I understand is that California has a glut of solar energy production capacity. So adding more rooftop residential solar isn't helping the utilities to manage their bottom lines. As a result, the utilities and policy makers want rooftop solar customers to pay what they feel is a "fair share" while preserving the interests large-scale solar infrastructure creation. All the California IOUs, energy contractors, large-scale realty, and corporate constituents have the laywers and purchasing power to move the NEM 3.0 policies to be more favorable for them. Retail consumers and small business solar do not have much advocacy since there are more important things for California to focus its public resources.
Under NEM 3.0, we should expect to see a negative impact to the residential solar installation market in the California. Installers are already challenged to dramatically reduce their prices to offset the out-going federal investment tax credit. Adding on further impact for worsening per-kWh savings could force many smaller companies out of business as they have to drop their pricing to give residential homeowners a reasonable ROI.
A couple of interesting reads for those with some time:
1) Blog post detailing what is happening and why the utilities are pushing to update the NEM rates:
https://sustainableenergygroup.com/solar/the-future-of-solar-is-at-risk-california-nem-3/
2) Public Database for R1407002 under which all of this is happening with the CPUC:
Proceeding Details
You can also leave a public comment on that second link.
TL;DR: If you're in California and are on the fence about solar and battery backup... you should expect to see worsening energy rates under NEM 3.0 and worsening incentives as the federal investment rebate continues to decrease.
It's fairly well publicized that the ITC is decreasing over the next few years. What's less well known is that the California Public Utilities Commission (CPUC) is making progress around the rules for how California utilities can set energy rates that Solar customers have to pay under Net Energy Metering 3.0 (NEM 3.0).
NEM 3.0 is expected to come into effect for new California PV installs in early 2021. This change to California retail energy rate policy plus the reduction to the investment tax credit makes Solar much less attractive in the coming months versus today.
NEM 3.0 is a bit of a misnomer; for retail customers it is not a forward progression compared to NEM 2.0. NEM 3.0 as it currently exists removes many of the previous protections that prevented a California Utility from significantly arbitraging the difference between daytime production versus high demand time when the sun has set.
Under NEM 2.0 we saw peak rates starting in the afternoon when the sunlight would be available. Under NEM 3.0, it's completely within the Utility's right to decrease the NEM rate during the afternoon and dramatically increase the NEM rate at dusk. This lowers the value of the energy generated by solar, and increases the cost of energy used during peak times after sunset.
This means future solar-only customers will experience much worse net-rates than what previous and current new solar installations have seen over the last few years. This would basically necessitate the installation of batteries to allow a homeowner to individually distribute their own clean energy storage and use during a day/night cycle.
The general root cause of this that I understand is that California has a glut of solar energy production capacity. So adding more rooftop residential solar isn't helping the utilities to manage their bottom lines. As a result, the utilities and policy makers want rooftop solar customers to pay what they feel is a "fair share" while preserving the interests large-scale solar infrastructure creation. All the California IOUs, energy contractors, large-scale realty, and corporate constituents have the laywers and purchasing power to move the NEM 3.0 policies to be more favorable for them. Retail consumers and small business solar do not have much advocacy since there are more important things for California to focus its public resources.
Under NEM 3.0, we should expect to see a negative impact to the residential solar installation market in the California. Installers are already challenged to dramatically reduce their prices to offset the out-going federal investment tax credit. Adding on further impact for worsening per-kWh savings could force many smaller companies out of business as they have to drop their pricing to give residential homeowners a reasonable ROI.
A couple of interesting reads for those with some time:
1) Blog post detailing what is happening and why the utilities are pushing to update the NEM rates:
https://sustainableenergygroup.com/solar/the-future-of-solar-is-at-risk-california-nem-3/
2) Public Database for R1407002 under which all of this is happening with the CPUC:
Proceeding Details
You can also leave a public comment on that second link.
TL;DR: If you're in California and are on the fence about solar and battery backup... you should expect to see worsening energy rates under NEM 3.0 and worsening incentives as the federal investment rebate continues to decrease.