CleanSky is one of the most competitive electricity companies in the Texas energy market. They consistently offer competitive rates, especially on True Fixed plans, and they also have strong customer service, a solid PUCT rating, and frequently rank near the top of our provider reviews.
There is no doubt that CleanSky is a strong company to do business with. But what about its Free Nights option? Is it actually worth trying? With a free-hours window from 9:00 p.m. to 6:00 a.m., this plan offers a free-night period that is similar to what we usually see in the market. Let’s review the pros and cons.
CleanSky Free Nights Pros
- No Base Charge: This is a good feature for low-usage customers, especially small apartments. Unlike many free-night plans, this one does not include a monthly base charge or minimum usage fee.
- 100% Green Energy: The plan also includes 100% renewable energy.
CleanSky Free Nights Cons
- TDU Charges Still Apply During the Free Window: You will still be charged TDU delivery fees during the free-hours window, usually around 4–6 cents per kWh. This is common in the market, so this is more of an industry-wide issue than a CleanSky-specific problem. Some companies, such as Infuse, Reliant, Amigo, and Just Energy, may not charge TDU fees during the free window. However, their daytime energy charges are often higher, so the total savings still depend on your actual usage pattern.
- The Advertised Rate Assumes High Free-Night Usage: For the advertised rates shown on the EFL at 500, 1,000, and 2,000 kWh, CleanSky assumes that 42% of the customer’s energy usage happens during the free-hours window. The issue is that many companies with similar free-night windows use a more realistic assumption of around 32%. Because of this, CleanSky’s Free Nights plan may look cheaper on the EFL than it actually is for many customers.
Check Free Nights Competitiveness vs. a True Fixed Plan
The next comparison evaluates the latest pricing for this plan against the top 20 competitive fixed-rate plans in the market, including some of the cheapest plans available on Power to Choose. This distinction is important. We are not comparing this free-night plan against expensive or weak fixed-rate plans just to make it look better. We are comparing it against real, competitive market rates.
The data for this CleanSky Energy plan is collected directly from the offer shown on CleanSky’s website. This data is usually checked twice per week. The same applies to the True Fixed plans used for comparison. Their pricing is usually collected either from Power to Choose or directly from the electricity provider’s website.
This comparison is based on the Oncor service area. However, the gap between this free-night plan and competitive True Fixed plans is usually similar across other TDUs.
CleanSky - Free Nights Plan
Free Nights 12 - Time Of Use
Free Hours (Day/Night)
Term:
12 months
Last update:
April 29, 2026
Advertised average rates
1,000 kWh
16.50¢
500 kWh
17.00¢
2,000 kWh
16.30¢
Advertised average rates
1,000 kWh
16.50¢
500 kWh
17.00¢
2,000 kWh
16.30¢
VS
TOP 20 - True Fixed Plan in the Market
No Bull 12 - 12 month plan
True Fixed
Listed on Power to Choose
Term:
12 months
Last update:
April 29, 2026
Advertised average rates
1,000 kWh
13.00¢
500 kWh
13.00¢
2,000 kWh
13.10¢
Advertised average rates
1,000 kWh
13.00¢
500 kWh
13.00¢
2,000 kWh
13.10¢
Luminous Night vs Top 20 Truly Fixed Plan
This chart is dynamic, and you can change the usage filter in the top-right corner. For the filter selection, use 500 kWh or 1,000 kWh if you live in an apartment. Use 1,000 kWh and 2,000 kWh for medium to large houses, and 2,000 kWh to 3,000 kWh for very large houses.
- The graph shows how competitive this free night plan is.
- The orange shaded area represents the percentage of usage where this plan performs better than a true fixed plan—typically around 55% usage shifted or higher.
- The blue shaded area shows that if you fail to shift enough usage into the free window, your effective rate increases quickly; to match a competitive fixed-rate plan, you would need to move an unusually large share of your electricity usage to nighttime hours, which is difficult for most households, and even shifting 50% may still leave you overpaying by more than 10%.
We can already draw a first conclusion about this plan. Unfortunately, it is not competitive in the current market.
To make this plan beat a competitive True Fixed plan, you would need to shift more than 55% of your usage into the free-hours window. That is difficult because the free window is only 8 hours long. For this type of plan to be attractive, the break-even point should be closer to 40% free-hours usage, which is much more realistic for some households. But when the required shift is above 50%, it becomes too high for most customers, and many households will likely end up overpaying.
This is another way to represent the graph: on the x-axis, you will see the kWh usage, and in the filter you can select the percentage of usage you are able to shift into the free window. 35% represents a bad-case scenario (you failed to shift enough electricity into the free window), 45% represents a normal scenario (achievable for most households), and 60% represents a best-case scenario (a disciplined household that can shift most of its load into the free window). You will see that even in the best-case scenario, which is uncommon, this plan still struggles to beat a decent True Fixed plan in the market.
Fixed vs Free Window (Scenarios)
CleanSky Free Plan Bill Estimation
To give you a better estimate, the table below shows how much you may overpay depending on your usage and how much electricity you can shift into the free-night window.
Focus mainly on the 30%–60% range, since that is the most realistic area for most households. Use the table below to select your TDU and your monthly usage level: 500 / 1,000 / 2,000 / 3,000 kWh.
Because this plan still includes TDU delivery charges during the free-hours window, your final bill depends heavily on your total monthly usage and on how much usage you can move into the night period.
As a general guideline:
- Use 500–1,000 kWh for apartments.
- Use 1,000–2,000 kWh for medium to large homes.
- Use 2,000–3,000 kWh for very large homes.
Free Nights Bill Estimate Table
Monthly bill by free-window usage percentage
Final Summary
CleanSky is one of the strongest providers for True Fixed plans, but its Free Nights plan is not as competitive. The main issue is that you would need to shift too much electricity usage into the free-hours window to make the plan worth it. For most households, that is not realistic. There are better free-night options available in the market. Check our list of the best free-night electricity plans to compare stronger alternative