Pool Automation That Pays: Programming Around SDG&E Time-of-Use Rates

Shift pump run times to cut SDG&E costs

Your pool pump can be the single largest electricity draw in your home. When it runs during SDG&E's 4:00 p.m. to 9:00 p.m. on-peak window, it hits your wallet. SDG&E splits the year into Summer (June 1 to October 31) and Winter (November 1 to May 31). It also defines Super Off‑Peak, Off‑Peak, and On‑Peak periods that change by weekday and weekend. According to SDG&E's pricing plans, on-peak falls from 4:00 p.m. to 9:00 p.m. on weekdays.

This guide focuses on practical scheduling rules, controller examples, and safeguards so you can capture real savings without sacrificing water quality or comfort. See our Smart pool automation upgrades guide for controller examples. We also link to a practical variable-speed pump programming article for San Diego pools: Why variable-speed pumps save San Diego pools money.

Where the biggest savings actually come from

Want to know which pool parts hit your SDG&E bill hardest during on‑peak hours?

Start with the pump. Typical single‑speed pumps draw roughly 1.5 to 2.5 kW per hour, so each hour adds 1.5 to 2.5 kWh to your usage, according to energy.ecoflow.com.

Quick equipment power map

• Single‑speed pump: about 1.5–2.5 kW while running, so long runtime during on‑peak quickly raises bills.
• Variable‑speed pump (VSP): power varies roughly 0.2–1.8 kW depending on speed, and VSPs can cut pump energy 50–80% when staged correctly.
• Heat sources: electric heaters can draw 5–15 kW, while heat pumps are more efficient and typically draw 1–6 kW depending on capacity.
• Lights and cleaners: LED lights use only a few dozen watts each, and robotic cleaners draw about 0.1–0.3 kW per hour.

For a normal San Diego home without heating, a well‑configured VSP often yields about 7.5–10 kWh per day for pool operation. Add heat and daily use can jump into the tens of kWh, which is why heating choices matter.

Why pump speed staging is the TOU game changer

The pump affinity laws explain the payoff. Cutting pump speed in half reduces power use far more than half because power falls with roughly the cube of speed.

Put simply, halving speed can cut power by about 87.5%. That makes running longer at low speed much cheaper than short bursts at high speed.

Under SDG&E time‑of‑use pricing, shift most low‑load filtration to off‑peak hours at low speed. Then reserve short high‑speed periods for chemical circulation during off‑peak or shoulder windows.

Want a deeper dive on programming VSPs for San Diego pools? See our article on why variable‑speed pumps save San Diego pools money.

Controller programming patterns that shift load off SDG&E on‑peak

Tired of seeing your pump push up your SDG&E bill between 4:00 p.m. and 9:00 p.m.? Use your automation to move heavy work to cheaper windows instead.

The simple pattern works every time: keep a low, continuous circulation during on‑peak, and run medium or high speeds during super off‑peak for turnover, cleaning, and backwash.

Best practice is to run a low pump speed during on‑peak to prevent dead zones and maintain chemistry. Then use higher speeds during overnight or daytime super off‑peak for intense tasks.

Hayward OmniLogic example

1. Open Pumps or Filter Pump from the home screen and choose Set Schedule.
2. Add Schedule 1: 12:00 AM to 6:00 AM, All Week, set speed to medium‑high for turnover and cleaner cycles.
3. Add Schedule 2: 10:00 AM to 2:00 PM, Weekdays, same medium speed window if your TOU has daytime super off‑peak.
4. Add Schedule 3: 4:00 PM to 9:00 PM, All Week, set a low continuous speed around 30 to 50 percent for circulation.
5. Program the heater to allow heating only during off‑peak windows and require the pump at the minimum speed for flow.

Pentair IntelliCenter and AquaLink/Jandy patterns

1. From Schedules, add weekly pump programs for overnight and daytime super off‑peak, matching your SDG&E plan.
2. Set VSP RPM or percentage for each program: low 30–50 percent for on‑peak, 50–70 percent for off‑peak, and 70–100 percent for super off‑peak bursts.
3. Create heater schedules so heating runs only during cheaper windows and only when the pump meets required flow.

Intermatic analog and digital timer tips

1. Analog timers: place ON/OFF trippers for 12:00 AM–6:00 AM and 10:00 AM–2:00 PM for weekday super off‑peak.
2. Digital models: program multiple ON/OFF events for those same windows and assign them to the pump circuit.
3. Remember analog timers usually only do daily repeats, so use multiple timers if you need day‑by‑day control.

Why these speeds? The pump affinity laws mean power falls quickly as you lower speed. Cutting to half speed can cut power by roughly 87.5 percent, so running longer at low speed is cheaper than short high bursts.

Common UI options and pitfalls to check

• Confirm the controller clock, timezone, and daylight savings settings so schedules fire at the right time.
• Watch firmware limits for number of programs or speed steps; older units may not support multiple weekday windows.
• Ensure heaters require a minimum pump speed for safe operation; otherwise heating may fail or damage equipment.
• If using a mobile app, verify the local panel time matches the cloud time to avoid schedule drift.
• Schedule cleaners only when pump speed and flow are high enough for the cleaner to work properly.

Implement these patterns, then watch your usage for a billing cycle or two and tweak as needed. If you want hands‑on help, see our smart automation guide for San Diego homes.

Smart pool automation upgrades

Protect water quality and equipment while shifting runtimes

Want SDG&E savings without ending up with cloudy water or a broken pump? Aggressively moving runtime off‑peak can save money, but it creates risks if you stop circulation during hot or high‑use periods. Aqua Magazine explains that dead zones and stagnant water can allow algae and bacteria to bloom within days, so you must preserve minimum flow.

We recommend using automation to keep a low continuous speed during on‑peak hours and reserve higher speeds for off‑peak turnover and cleaner cycles. Variable‑speed pumps handle this well because they can run longer at very low power without stress to the motor. Automation also lets you add safety overrides for freeze protection and timed chemical dosing so chemistry stays balanced.

Controller safeguards to program

• Maintain a low continuous circulation during on‑peak to prevent dead zones and keep chemicals distributed.
• Schedule periodic medium or high‑speed bursts during off‑peak to meet turnover and run cleaners effectively.
• Delay chemical feeder dosing until the pump has run long enough for full circulation, so chemicals mix instead of sitting local to the feeder.
• Enable temperature‑based freeze protection so the system overrides schedules if outdoor temps hit a preset threshold.
• Add flow checks or alerts to catch low flow or stopped circulation before equipment or water quality suffers.

How to monitor savings and spot problems

Use a sub‑meter or energy monitor plus runtime logs from your automation to validate TOU savings and find issues. Compare monthly bills before and after changes and review the controller's runtime and flow reports for anomalies.

Smart monitoring also watches chemistry, temperature, and pump performance and sends alerts for out‑of‑range readings. That helps you fix small problems before they become big and costly repairs.

Local factors change how you schedule. San Diego's mild, sunny climate often means year‑round pools and lower winter runtimes, while pool covers can cut heating and evaporation dramatically according to energy.gov.

Saltwater chlorine generators need reliable flow, so schedule their runs outside on‑peak when possible. Solar heating requires daytime circulation, so balance that with lower pump speeds or dedicate solar circulation to minimize grid draw.

For help quantifying savings and finding current rebates for VSPs or smart controls, see our guide on eco‑friendly upgrades and our article on validating energy savings. Those pages list rebate history and where to check current incentives.

Eco‑friendly pool upgrades that cut water and energy use

Turn TOU schedules into verified savings

Want real savings without sacrificing water quality? Start by finding your biggest loads: pumps and heaters. Shift heavy work into super off‑peak windows and keep a low continuous circulation during on‑peak to avoid dead zones. Use automation plus energy monitoring and runtime logs to validate savings and spot problems. Treat the sample schedules in this post as starting templates, then fine‑tune them for your local climate and usage.

Need help putting a schedule in place or upgrading to a variable‑speed pump and monitors? Swimquip Pool & Spa Supply Center serves San Diego and can help with parts, programming, and service. Call us at (619) 282-2722 or visit our shop for advice and supplies. Combine smart scheduling with pool covers and regular filter service to multiply savings and extend equipment life.