Best free resources for CEA prep in 2026 — compiled list

For CEA - Certified Energy Analyst specifically, I found the PracticeTestGeeks explanations were detailed enough that I didn't need to buy a separate study guide. The combination of doing the practice questions + reading every explanation (for both right and wrong answers) covered most of the content I needed.

The official candidate guide is something a lot of people skip but it literally tells you the topic weighting and domain breakdown. It's the roadmap for your study plan. Never skip it.

Great list. I'd add: LinkedIn Learning has some energy & utilities-related courses that overlap with cert content, and if you have a library card many libraries give free access to it. Also check if your local library has access to O'Reilly or similar — tons of technical content there.

Honestly the thing that moved the needle for me with CEA prep wasn't grinding more questions, it was actually reading why the wrong answers were wrong. PracticeTestGeeks was solid for this because the explanations don't just tell you the right pick, they walk through what each option was testing. The CEA loves throwing distractors that are technically true statements but don't answer what's actually being asked. If you only memorize the correct answer you'll get wrecked when they reword it.

So my advice, slow down. When you miss one, don't just note the right letter and move on. Figure out what made the other three tempting. I started keeping a little log of my own bad reasoning and it's wild how often I was falling for the same trap. By the end I could spot a distractor before I even finished reading it. That's the skill the exam's really testing, not recall.

Honestly the biggest thing that helped me wasn't grinding through hundreds of questions, it was actually reading why the wrong answers were wrong. PracticeTestGeeks was good for this because the explanations don't just tell you the right pick, they walk through why the other three options trip people up. On the CEA that matters a lot. So many questions hinge on subtle stuff like which baseline you use or whether a measure counts as retrofit vs new construction, and if you only memorize the correct answer you'll get wrecked the second they reword it.

My advice, slow down on every question you miss and don't move on until you can explain in your own words why each distractor is a trap. It's slower but it sticks. I started catching myself thinking "oh they want me to assume X here" before I even looked at the choices. That shift is what got me over the line, way more than just doing reps.