APS Residential Battery Pilot FAQ

Question linkHow do I qualify for a battery incentive?

Pilot participants need to be residential customers in APS territory and must be on a time-of-use (TOU) service plan or a grandfathered service plan with a solar rate rider.

Question linkAre all batteries eligible for an incentive?

Only battery systems provided by a participating battery partner are eligible to receive incentives. The battery system must also be new and connected to the APS grid for the first time.

Question linkWho receives the incentive?

Customers may assign his or her incentive to an approved third party. In cases in which the customer assigns the incentive to the approved third party, the third party must demonstrate through documentation that they have compensated the customer for the full amount of the paid incentive amount.

Question linkWho installs the battery system?

The battery partners and/or installer networks you choose should install the battery system. Your installer will complete and submit an interconnection application on your behalf.

Question linkWhat additional equipment is required to participate in the pilot?

Additional equipment may be required based on your current system configuration. The battery system design must allow for the battery production to be measured separately, except in the case of DC coupled systems. Sample diagrams are available at www.aps.com/dg.

Question linkHow long will the pilot last?

The pilot will last for three years from the date a participating battery system receives the Permission to Operate from APS.

Question linkHow many annual events can I expect?

The number of annual events will vary depending on the APS need for capacity, but no more than 100 events will be called each year. Events may take place on weekdays from 6:00 PM-9:00 PM and on weekends & holidays from 9:00 AM-9:00 PM.

Question linkHow long will each event last?

Events will range in duration from one hour to four hours.

Question linkWhile participating in events will I have enough battery capacity to meet my own energy and demand curtailment needs?

During an event, your battery system will discharge only excess capacity for grid support. Excess capacity refers to capacity that remains after your own peak energy and demand needs are met and reserving at least 20% battery capacity.

Question linkCan I opt out of an event?

Some of the battery providers provide the opportunity to opt out of events. You will need to communicate your intent to opt out of an event using the communication channels provided by your battery provider partner.

Question linkHow soon will I be notified of an event?

Participants will be notified of an event within four hours or up to 24 hours prior to the start of the event.

Question linkWhat are the benefits of combining a battery system with solar?

Combining solar with a battery system allows you to store the solar energy produced in the middle of the day and use it during the peak period from 3:00 PM-8:00 PM when energy rates are the highest. Storing and using all the solar energy you produce provides customers with the most flexibility to lower peak energy and demand charges and save the most money. The potential for energy and demand savings that you can realize will largely depend on how your solar and battery system are operated and the APS service plan selected.

Question linkDo I need solar system to install a battery?

A solar system is not required to qualify for a Residential Battery Pilot incentive. A battery system can be charged by the grid in the off-peak periods and used by the customer to reduce energy use and demand during on-peak hours when energy prices are higher.

Question linkWhen fully charged, approximately how long can a battery system power my home?

The number of hours a battery system can run a home depends on several factors, such as the size of the battery system and the loads in the home that are being powered. A 13.5 kW battery system can run a home that averages 28 kWh/day for 12 hours when fully charged.

Question linkDoes my home stay connected to the grid with a battery?

If your home has electric service, even if you don’t use any energy, the home is grid connected. However, if the home is energy efficient and has a solar and battery system, it is possible to generate enough power to produce all the home’s energy needs and essentially become net zero so that no energy is purchased from the utility.

Question linkDoes the battery need to be installed outdoors or indoors?

Battery systems can be installed outside but will work better if installed in a garage or in a conditioned space. Extreme changes in temperature impact the performance of the battery system.

Question linkHow much energy does the battery store?

Capacity to store energy depends on the size of the battery installed. Current residential battery systems range from 3 to 13 kW.