Between watering the lawn, grilling, and spending more time outside overall, the backyard uses a lot of energy during the hot summer months. While much of the energy consumption is necessary, there are five major pitfalls experts say you can avoid to keep energy bills down.

Actions as simple as unplugging string lights when you go in for the night or turning off the grill as soon as you're done cooking decrease energy use and leave more money in your wallet. Read on to discover five hidden backyard issues that could be driving up your utility bills and expert-approved ways to fix them.

1. Lack of Shaded Areas in the Backyard

A pretty pergola is a great way to upgrade your outdoor space, but thanks to the shade it provides, the structure can also lower your energy bills if placed near your home. "When your backyard lacks shade, the sun will beat down on your home’s exterior, and this will raise indoor temperatures, especially through South and West-facing windows," says Tim Heneveld, country director for PERGOLUX North America. This forces your air conditioning unit to work overtime, which causes spikes in your energy bills.

Heneveld recommends strategically incorporating shaded areas, including structures and landscaping, into your backyard for one of the smartest and most underrated ways to cut cooling costs. "If you install structures like a pergola or a retractable awning, you can block intense afternoon sun while still letting in airflow," he says.

2. Plugged-In and Wired Outdoor Lights

Whether it's wall sconces or string lights, plugged-in and wired outdoor lights can kill your energy bills. "With longer daylight hours and more time spent outdoors, many homeowners run these lights more than they realize, which adds up quickly on the electric bill," says Mark Feygin, founder and CEO of PowerSetter. He explains this is especially true if the lights use older, inefficient light bulbs or stay on for long periods of time every night.

To reduce your energy costs, Feygin recommends switching to solar-powered outdoor lights. "They charge throughout the day using sunlight and require no electricity from your home, meaning they provide ambient lighting at night without increasing your utility bill," he says. The switch is a simple upgrade that can lead to noticeable savings in the summer.

3. Leaving a Grill Plugged In for Too Long

If you fire up the grill regularly over the summer, there's a good chance it's making your energy bills higher. Ace Hardware's home expert, Lou Manfredini, says that if you are using a gas or electric grill, it should generally take 15 to 20 minutes to get it to the right temperature, after which you should do your grilling, then turn the appliance off. "Allowing too much time for warm-ups and forgetting to shut things down can add to your energy bills," Manfredini warns.

4. Dirty HVAC Unit

Cranking up the air conditioning unit is inevitable during the hot summer months, but a dirty HVAC unit could be contributing to excessively high energy bills. "If the small metal fins on the outdoor unit get clogged with dust, grass clippings, or airborne seeds, the overall cooling efficiency of the HVAC system will deteriorate, and the system will consume more energy to provide the same cooling effect," says Andy Fox, filtration and indoor air quality specialist at 3M.

For this reason, Fox stresses the importance of regularly cleaning your outdoor unit. "Consider using a shop vac to remove large debris (if you have access) and then use a hose to wash the remaining debris away after first turning off the electrical power," Fox says. Additionally, he advises that you change your HVAC filters at least every 90 days for best performance.

5. Overwatering Your Lawn

A lush green lawn is the ultimate way to boost your home's summer curb appeal, but regulating how much water you use is key to preventing high energy bills. Overwatering your grass can lead to a huge water bill, and forgetting to turn off the irrigation system can waste large amounts of water. To avoid using too much water and seeing your utility bills skyrocket, Manfredini recommends adding a water timer that helps get the right amount of water on the lawn and turns off by itself.