Why Your Energy Bills Are Higher With Solar: The Plug Load Problem

If your electricity bill is still higher than expected after installing solar, you are not alone. Many homeowners assume that once panels are on the roof, the bill should drop dramatically. If you are consuming more electricity than your system generates, the reduction will be smaller than expected, and a common, overlooked cause is plug loads.

What Is a Plug Load?

A plug load is the energy used by any device plugged into a wall outlet, whether it is actively running or just sitting idle. TVs, WiFi routers, cable boxes, computers, chargers, smart speakers, and kitchen appliances all draw power. Some usage is obvious. Much of it is quiet, standby or "phantom" power that runs in the background around the clock and adds up over a billing cycle.

Common Plug Load Devices

Obvious devices

• TVs, cable boxes, and entertainment consoles
• Plug-in lamps and appliances with clocks or LEDs
• Hot tubs, saunas, and cold plunges
• Mini fridges and wine fridges

Less obvious devices

• WiFi routers, extenders, and modems
• Security systems, smart home hubs, and lighting control systems
• Computers, monitors, printers, and shredders
• Phone chargers left plugged in all day
• Coffee makers, ice machines, and space heaters

Often overlooked

• Smart thermostats and their transformers
• Garage door openers and irrigation systems
• Pool timers, pumps, and outdoor lighting controls
• Doorbells and furnace or hot water ignitors

Even small devices contribute to your total energy use when left on continuously. Multiply that across a typical household, and dozens of devices are quietly adding to your bill.

Why Plug Loads Matter When You Have Solar

Your solar system is designed based on your expected energy usage. If plug loads run higher than anticipated, or you add more electronics after going solar, it can throw off that balance. You may end up using more electricity than you are generating, especially during peak hours, and if you have a battery, you may draw down more of your backup power, leaving you more reliant on the grid. Plug loads silently erode solar savings, but the good news is that you can do something about it.

Solar offers strong long-term savings, but it works best paired with smart energy habits. Plug loads are easy to overlook and one of the fastest things to fix.

Smart Plug Load Solutions

1. Use smart power strips

Smart or energy-saving power strips automatically cut power to devices in standby mode. Many include a "control" outlet, so when a main device like a TV or computer turns off, the strip shuts off power to peripherals such as speakers or printers.

2. Consolidate where you can

Replace multiple single-use devices with one multifunction unit. A printer, scanner, and copier combo, for example, draws less power than three separate machines.

3. Identify plug load hotspots

Walk through your home and list every plugged-in device. Are they necessary? Can some be unplugged when not in use, or put on timers to run only during daylight hours when your panels are producing the most?

4. Schedule high-use appliances for daytime and off-peak hours

Shift energy-heavy activities, such as running the dishwasher, doing laundry, or charging an EV, to midday when solar production is highest. This helps maximize self-consumption and reduces the need to draw from the grid. It pairs well with other summer energy efficiency habits.

5. Leverage home energy monitoring

Many solar systems include monitoring apps that show how much electricity you are producing and using. These insights can help you spot when plug loads are spiking and guide better habits. If you use the Tesla app, it provides your energy data alongside system monitoring; reviewing your energy graphs can help you manage plug loads without changing any of your system's settings.

Small Adjustments, Real Savings

Solar remains a strong long-term investment, but like any system, it performs best alongside smart habits. Plug loads are easy to overlook, but they are one of the fastest ways to close the gap between the bill you expect and the bill you get. If you would like help reviewing your system's performance, reach out to schedule a consultation with our team.

Frequently asked questions

What exactly is a plug load?

A plug load is the energy used by anything plugged into a wall outlet, whether it's actively running or sitting idle. That includes TVs, routers, chargers, kitchen appliances, and more.

How much of my electricity use can plug loads account for?

Plug loads can make up as much as a third of a home's total electricity use. For a home with solar, that is often the gap between the savings you expect and the bill you actually see.

Why do plug loads matter more after installing solar?

Your solar system is designed around expected energy usage. If plug loads run higher than anticipated, or you add more devices after going solar, you can end up using more electricity than the system generates, especially during peak hours.

What is phantom or standby power?

Phantom power is the electricity a device draws while turned off or idle, such as a cable box, phone charger, or coffee maker. It runs quietly in the background around the clock and adds up over a billing cycle.

Can a smart power strip really make a difference?

Yes. Smart power strips cut power to peripheral devices automatically when a main device is turned off, which reduces standby draw without requiring you to remember to unplug anything.