Reducing Diesel Emissions for a Healthier Tennessee

Also written: RDE4HT · Tennessee State Clean Diesel · TN DERA rebate · ETCleanFuels diesel rebate

A scrap-and-replace rebate for older diesel vehicles and engines, paid after contract requirements are met, administered by East Tennessee Clean Fuels on behalf of the Tennessee Department of Environment and Conservation. Draws on Tennessee's EPA Diesel Emissions Reduction Act (DERA) State Clean Diesel allotment.

$130,500

per Class 8 truckwhat this program pays toward one battery-electric tractor

This program’s headline amount for one truck; the amount may depend on the buyer’s circumstances. What is available now and the potential in Tennessee, for any Class 8 tractor, are on the Tennessee page (Grade B · 42 programs tracked).

Program signals

UPCOMINGBetween rounds — the program returns; the next round is not announced.

TESLA SEMITesla Semi: eligible under the program’s vehicle rule — it keeps no make/model list (checked August 17, 2026). Tesla Semi in Tennessee →

Track RDE4HT

Pro carries the rest of RDE4HT: current program dates, funding, eligibility, caps, stacking rules, and the source behind each figure, with an alert when the window changes.

Window	Who can apply	Trucks per fleet	Funding left	Stacks with	Source

RDE4HT in full, with every other program in Tennessee — in Pro

This page · free

What it pays per Class 8 truck
Open, upcoming or competitive
What the program is, its type, where it applies, and who runs it
Whether the Tesla Semi is admitted
Available now and potential per truck in Tennessee — the Tennessee page
Last verified date

Tracked · Pro

Complete Program Information — the window: when it opens and closes, with dates; how the money is awarded; and every other program in Tennessee that pays for a Class 8 truck
Applicant Eligibility — who can apply, how many trucks it covers, per-fleet limits and caps
How to Access the Money — what RDE4HT stacks with and in what order, and a cautious case
Funding remaining — what is left in the pot, as the program reports it
Program Radar — a heads-up before this window closes or the next round opens
Source Documents — the document behind every figure, so you can read it yourself

Pro covers all 50 states and DC — 2,384 incentive programs · opens soon · cancel anytime once it does · Org (five seats, one invoice) and Enterprise on the pricing page

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Pro opens soon — $295 a month or $2,950 a year