Constellation
12 Month (No Min Usage Fee)
Rate
13.50¢
Term
12 Months
$1000 kWh
$135
Rates as of July 2026 · verify on the EFL
- ✓ 30% green
Best for Reliability Constellation in Harlingen
Constellation in Harlingen.
Constellation has 2 plans live on the AEP Texas Central grid serving Harlingen. Lowest rate 13.50¢/kWh — about 1.2¢ below the Harlingen average.
3.9 · AEP Texas Central grid · 65K residents · Cameron County
Constellation in Harlingen
By the numbers.
Lowest here
13.50¢
Constellation in Harlingen
Harlingen avg
14.71¢
across all providers
Constellation plans
2
on AEP Texas Central
100% green
0
renewable plans
What you actually pay in Harlingen
Energy charge vs the wires.
Constellation's cheapest plan in Harlingen is 13.5¢/kWh all-in. That number is two parts: Constellation's energy charge, plus the AEP Texas Central 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
8.4¢
AEP Texas Central delivery
5.1¢
All-in
13.5¢
At a typical 1,000 kWh month, that's about $135 — including the ~$4.93 AEP Texas Central meter charge. Because delivery is fixed, the only lever between providers in Harlingen is the energy charge. Constellation's best rate ranks #12 of 18 providers on the AEP Texas Central grid.
Top Constellation picks for Harlingen
Best Constellation plans here.
Constellation
12 Month GREEN (No Min Usage Fee)
Rate
14.30¢
Term
12 Months
$1000 kWh
$143
Rates as of July 2026 · verify on the EFL
- ✓ 30% green
Harlingen, Cameron County — population 65K, sample ZIP 78550. Served by AEP Texas Central (outage line: 1-866-223-8508).
Switching in Harlingen
Same wires — new bill from Constellation.
AEP Texas Central owns the wires in Harlingen 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 Harlingen — FAQ
Common questions.
Does Constellation serve Harlingen, TX?
Yes. Constellation offers 2 plans in Harlingen on the AEP Texas Central grid, starting at 13.5¢/kWh all-in. Enrollment is online and service is delivered by AEP Texas Central.
What's the delivery charge in Harlingen?
AEP Texas Central charges about 5.1¢/kWh plus ~$4.93/month to deliver power in Harlingen. 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 Harlingen?
Constellation's lowest Harlingen rate ranks #12 of 18 providers serving the AEP Texas Central grid. The cheapest plan overall in Harlingen is 7.1¢/kWh; Constellation's best is 13.5¢/kWh.
How long does it take to switch to Constellation in Harlingen?
1 to 3 business days. AEP Texas Central 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 Harlingen
See how Constellation's 2 plans stack up at your real Harlingen usage.
No spam · It's free · Takes 60 seconds
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.