Constellation
12 Month (No Min Usage Fee)
Rate
14.30¢
Term
12 Months
$1000 kWh
$143
Rates as of July 2026 · verify on the EFL
- ✓ 30% green
Best for Reliability Constellation in Mertens
Constellation in Mertens.
Constellation has 3 plans live on the Oncor grid serving Mertens. Lowest rate 14.30¢/kWh.
3.9 · Oncor grid · Hill County
Constellation in Mertens
By the numbers.
Lowest here
14.30¢
Constellation in Mertens
Mertens avg
14.72¢
across all providers
Constellation plans
3
on Oncor
100% green
0
renewable plans
What you actually pay in Mertens
Energy charge vs the wires.
Constellation's cheapest plan in Mertens is 14.3¢/kWh all-in. That number is two parts: Constellation's energy charge, plus the Oncor delivery charge — the cost of the poles and wires, set by the PUCT and identical on every plan from every provider on this grid.
Constellation energy
10.1¢
Oncor delivery
4.2¢
All-in
14.3¢
At a typical 1,000 kWh month, that's about $143 — including the ~$3.42 Oncor meter charge. Because delivery is fixed, the only lever between providers in Mertens is the energy charge. Constellation's best rate ranks #12 of 18 providers on the Oncor grid.
Top Constellation picks for Mertens
Best Constellation plans here.
Constellation
12 Month GREEN (No Min Usage Fee)
Rate
15.30¢
Term
12 Months
$1000 kWh
$153
Rates as of July 2026 · verify on the EFL
- ✓ 30% green
Constellation
12Mo Usage Bill Credit + A/C Protection for 2 Units and HVAC Monitoring
Rate
15.30¢
Term
12 Months
$1000 kWh
$153
Rates as of July 2026 · verify on the EFL
- ✓ 30% green
Mertens, Hill County, sample ZIP 76666. Served by Oncor (outage line: 1-888-313-4747).
Switching in Mertens
Same wires — new bill from Constellation.
Oncor owns the wires in Mertens and processes the switch in 1-3 business days — no service interruption, no truck roll, no new equipment. Constellation files the switch on your behalf. Same-day if you order before 4-5 PM Central.
Constellation in Mertens — FAQ
Common questions.
Does Constellation serve Mertens, TX?
Yes. Constellation offers 3 plans in Mertens on the Oncor grid, starting at 14.3¢/kWh all-in. Enrollment is online and service is delivered by Oncor.
What's the delivery charge in Mertens?
Oncor charges about 4.2¢/kWh plus ~$3.42/month to deliver power in Mertens. This is set by the PUCT and is identical on every plan — from Constellation or any other provider — so the only number that actually differs between providers is the energy charge.
Where does Constellation rank on price in Mertens?
Constellation's lowest Mertens rate ranks #12 of 18 providers serving the Oncor grid. The cheapest plan overall in Mertens is 7.1¢/kWh; Constellation's best is 14.3¢/kWh.
How long does it take to switch to Constellation in Mertens?
1 to 3 business days. Oncor keeps delivering power the whole time — no interruption, no new meter, no truck roll. Order before roughly 4–5 PM Central on a weekday and same-day switching is usually available.
More on Constellation
Explore Constellation.
Compare Constellation plans in Mertens
See how Constellation's 3 plans stack up at your real Mertens usage.
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How enrollment works
You pick the plan here. Enrollment finishes on our secure checkout — same rate, no markup. If you'd rather skip the ZIP entry, Live Link pulls your real usage from Smart Meter Texas in about 30 seconds. Same plans, same checkout, less typing.