Frequently Asked Questions (FAQs)

General

Please find information on incentives and contractors capable of applying for incentives near you on www.theswitchison.org

Please navigate to the Download Data page and click the link called Download Dataset. This will provide an anonymized dataset of the latest TECH installations, including equipment information, site descriptors, installation details, and total project cost. These data are updated monthly.

Please navigate to www.energy-solution.com/tech/, which will continue to host information on TECH until it is integrated with this website later in 2022.

We use the Cal Enviroscreen 4.0 definition of a DAC, which is based on the Census tract in which a project occurred. In the TECH Working Dataset, each TECH project is labeled via the “Disadvantaged Community” column as either TRUE or FALSE. Visit the California Office of Environmental Health Hazard Assessment (OEHHA)'s CalEnviroScreen page to learn more: https://oehha.ca.gov/calenviroscreen

Residential addresses and personal contact information for occupants of homes where TECH projects occurred are Personally Identifiable Information (PII) and cannot be shared publicly. We provide several data points to help you identify critical elements of the location of each TECH installation, including the County, Gas IOU territory, California Climate Zone, and disadvantaged community status of the location of the project.

We only publish data on fully paid incentive applications on this website. There are many incentive applications that have been reserved but are not yet fully processed.

Yes, you can see these in both the TECH Working Data Set on the Download Data page and in the Cost Details dashboard on the Charts & Graphs page.

About Data In General

Each row of the TECH Working Data Set describes a project in which a heat pump water heater or heat pump HVAC system was installed in an existing home or residence in California. We describe installations in existing buildings as heat pump retrofit projects.

Please see the Data Key and Read Me file for the downloadable data set you are working with. You’ll find these links next to where you downloaded the data.

Total Project Cost is a data field provided by contractors when they submit an application for a TECH incentive. Contractors are instructed on the TECH incentive application to "Include total costs for the HP HVAC/HPWH installation only (material, labor, permitting, etc.) PRIOR to the TECH incentive being applied."

Thus, the Total Project Cost field captures what the contractor would have charged the customer for the heat pump installation project in total, had the contractor not received the TECH incentive. TECH contractors are required to disclose the value of the incentive they expect to receive via TECH to the customer at the time of payment. This cost therefore includes elements of the project related to the heat pump installation, such as an electrical panel upgrade or a smart thermostat installation. Additional elements of the installation that typically incur additional costs are denoted in the TECH Working Data Set.

Excel displays dates as integers unless you change the format of the cell to "Short Date." You can highlight whole columns with date data and change the format of the column to Short Date to fix this issue.

Currently we do not report the ZIP code in which each project happened in the TECH Working Data Set. We do this in order to ensure that we are not revealing information about individuals. For example, in some rural ZIP codes there are very few residents and one could use process of elimination to determine the home in which a TECH project happened simply by knowing the ZIP code and a few of the project details listed in the TECH Working Data Set.

As more projects are added to the TECH Working Data Set, we will consider adding ZIP codes once we are confident there is enough data to avoid disclosure of individuals' information by reporting ZIP code.

Why did single family data appear faster than multifamily data? As of August 2022, the TECH Working Data Set only contains data on heat pump installation projects in single family homes. Though both single-family and multifamily incentives were made available through TECH throughout all gas IOU territory starting in December 2021, there was generally much less lead time between submitting and incentive reservation and installing a heat pump in single-family homes versus multifamily housing buildings. For multifamily projects, property owners often submitted incentive reservations for incentives multiple months before the installation was planned. This is because heat pump retrofit projects in multifamily homes typically require more planning and coordination, since they involve replacing space and/or water heating for many building occupants at a time or replacing large and complex central water heating or space heating systems.

When will multifamily data be available on this site? Multifamily project data is expected to be added to the TECH Working Data Set starting at the beginning of 2023.

The Data Dictionary available for download alongside the TECH Working Data Set notes the Quality Assurance (QA) steps taken to remove erroneous data prior to publishing on this website. Data points that are removed are replaced with the text "Replaced during QA".

This is an alternative way of writing TRUE/FALSE that we need to use for some fields where there is incomplete data – where some rows have neither a 1 nor a 0, this means no data was provided by the contractor and none could be drawn from the relevant QPL. Meanwhile, a 0 means FALSE and a 1 means TRUE.

Data is updated at least once per month with new projects that received a TECH incentive.

No, the TECH Working Data Set does not include contractor names – but you can find contractors who have installed a heat pump and received a TECH incentive in the Contractor Data webpage under Public Data.

As of August 2022, data does not denote whether the home in which the heat pump was installed has rooftop photovoltaic solar panels. We will soon add an indicator to each row of the TECH Working Data Set to indicate whether a project was performed at a house that had solar panels. We expect this to be available starting in the fourth quarter of 2022.

Data currently on the website are only from the TECH market-rate single family program, which was open to participants anywhere throughout the state and not specifically targeting DACs. A large portion of the TECH incentive budget was set aside for separate incentive programs that specifically target DACs, such as the TECH multifamily program, the TECH low-income program, and many of the TECH regional pilot programs. As these programs progress, the number of claims and amount of the TECH budget spent in DACs will increase. Visit the California Office of Environmental Health Hazard Assessment (OEHHA)'s CalEnviroScreen page to learn more about the definition of a DAC: https://oehha.ca.gov/calenviroscreen

About the Charts and Graphs

Please go to the “Download Data” webpage and you can download public data there.

About Measuring Meter-Based Impacts

We will publish meter-based analysis for a TECH participant once we have at least a year of post-installation meter data for that participant. That should begin for the very first TECH participants in Q1 2023, and will continue to grow in both breadth and depth over time as more time passes following TECH-funded installations.

The TECH team uses the CalTRACK methodology, an open-source code for determining avoided energy use. See more about CalTRACK here: https://www.caltrack.org/.

Energy usage is modeled via the CalTRACK 2.0 daily and hourly methods with the OpenEEmeter to disaggregate temperature dependent, baseload, and discretionary usage within each fuel. The CalTRACK daily model defines a building’s energy consumption based on a linear relationship with outdoor weather conditions and the interaction between the building’s temperature dependence, the occupancy status and the time of week. The CalTRACK methods are based on industry guidelines established by The American Society of Heating, Refrigerating and Air-Conditioning Engineers and the Uniform Methods Project: Chapter 8 - Whole Building Methods and meet all International Performance Measurement and Verification Protocol (IPMVP Option C) requirements. CalTRACK also specifies rigorous steps for data cleaning and organization and weather station selection, among other technical factors. A combination of daily and hourly models is used to disaggregate metered usage.


Disaggregated usage categories are defined as follows:


Temperature-dependent usage
is energy consumption that increases or decreases with temperature, with warm-weather dependent usage defined as space cooling, and cool-weather-dependent usage defined as space heating.


Average baseload
(always on) consumption is computed by first finding days where the CalTRACK daily model does not detect temperature-dependent usage. For these days hours are ranked from lowest to highest according to kWh usage. The average usage of hours ranked 2 - 4 are then averaged across the year and extrapolated to 8,760 hours. This would capture always-on end uses such as refrigeration and “vampire” loads from electronic devices in standby mode.


Discretionary usage
is an estimate of a customer's non-temperature dependent, non-baseload usage that is independent of temperature. For example, cooking on an electric stove or using an electric clothes or hair dryer would be examples of discretionary usage.

FAQ Categories:

  • General
  • General - Data
  • Charts and Graphs
  • Measuring Meter-Based Impacts