Electric Construction Equipment Cost Per Hour: The Math

Part of "How It Gets Built," Buildermuse's series on the machinery behind modern construction.

The first version of this article was written as one contractor's first-person account: an electric mini excavator put to work "last quarter," billed at $185 an hour on a hospital demolition job, and a pair of cost-per-hour tables "built from my own fuel tickets." We cannot verify any of that, and Buildermuse does not run equipment, so the anecdotes and the tables are gone. So are most of the specific numbers. The machine prices, battery sizes, pack costs, noise levels, rebate amounts, rental rates and the "35% lower operating cost" attributed to Volvo either could not be sourced or did not match the manufacturers' own published specifications.

What we can do is show how to run the numbers with current, sourced energy prices and published machine specifications, so you can plug in your own fuel burn, utilization and quotes.

Energy Prices Right Now

The biggest change since this article was first written is the price of diesel.

Input	Latest	A year earlier	Source
U.S. retail diesel, $/gallon	$6.179 (week of Oct 12, 2026)	$3.665 (week of Oct 13, 2025)	EIA weekly survey via FRED series GASDESW
Average commercial electricity price, cents/kWh	14.53 (July 2026, preliminary)	14.05 (July 2025)	EIA Electric Power Monthly, Table 5.6.A (released Sep 24, 2026)
Average industrial electricity price, cents/kWh	9.77 (July 2026, preliminary)	9.33 (July 2025)	EIA Electric Power Monthly, Table 5.6.A

Diesel has been high all year. The EIA weekly price was $5.64 in early April 2026 and peaked at $6.53 in the week of September 21. Electricity prices rose too, but only about 3% in the year to July.

Two cautions on those figures. First, the EIA diesel price is the retail on-highway price, which includes federal and state road fuel taxes. Off-road dyed diesel used in construction equipment is exempt from those road taxes, so your delivered price per gallon should be lower; use your own fuel invoices. Second, the electricity figures are national averages across all commercial or industrial customers. What you pay on a jobsite temporary service, or at your yard, depends on your utility, rate schedule and demand charges.

What the Manufacturers Publish

We checked the manufacturers' U.S. product pages on October 18, 2026. Neither lists a price; both direct buyers to a dealer quote.

Volvo ECR25 Electric (compact excavator). Volvo CE's U.S. product page lists a 20 kWh, 48-volt battery, indicative runtime of "up to 4 hours" depending on application, onboard charging of about 5 hours on 230-volt, 16-amp power, offboard fast charging to 80% in about 50 minutes on 400-volt, 32-amp power, a 24 hp peak electric motor, and an operating weight of 5,908 to 6,129 pounds.

Bobcat T7X (all-electric compact track loader). Bobcat's product page lists a 72.6 kWh lithium-ion battery, up to six hours of continuous runtime, and a 12-hour charge on a 240-volt, 40-amp outlet at about 6 kW. Bobcat says the machine is "totally battery powered with no hydraulics" and that a full U.S. recharge costs about $12. Its spec sheet lists bystander noise of 92.7 dB (ISO 6395) and operator-position noise of 65.4 dB.

The original article gave different battery sizes for both machines (62 kWh for the T7X) and claimed electric compact machines run around 60 dB against 93 to 100 dB for diesel. Bobcat's own bystander figure for the T7X is 92.7 dB. Electric machines are quieter in practice because there is no engine, but compare published ISO figures for the specific machines before you promise a noise level in a permit or a bid.

Energy Cost Per Hour

Here is the energy math using the published specs and the EIA average commercial rate of 14.53 cents per kWh. It ignores charger losses, which add some percentage depending on the charger.

• ECR25 Electric: 20 kWh x $0.1453 = about $2.91 for a full charge. Spread over Volvo's "up to 4 hours," that is roughly $0.73 an hour at the low end. If your duty cycle drains the battery in less time, the hourly figure goes up proportionally.
• T7X: 72.6 kWh x $0.1453 = about $10.55 for a full charge, in line with Bobcat's own estimate of about $12. Over six hours of runtime, roughly $1.76 to $2 an hour.

For the diesel side, the formula is the same: gallons per hour times your delivered price per gallon. Get gallons per hour from your telematics or fuel logs for the machine and work you are comparing. At the EIA retail price of $6.18 a gallon, each gallon per hour of burn costs $6.18 an hour before DEF; at an off-road price lower than that, scale it down. Either way, with diesel where it is in 2026, the gap in energy cost per hour is much wider than it was a year ago.

The original article's fuel burn figures, maintenance savings percentage and battery-reserve line were not sourced, so we have not used them.

The Rest of the Cost

Energy is only one line. Total cost per productive hour also depends on:

Purchase price. Electric compact machines generally cost more than diesel equivalents, but neither Volvo nor Bobcat publishes a list price, and the original article's prices were not sourced. Get written dealer quotes for both versions of the same machine size and use the difference.

Utilization and life. Divide the price difference, less expected resale, by the hours you will actually run the machine before selling it. That is the extra ownership cost per hour you need the energy and maintenance savings to cover.

Maintenance. Electric machines skip engine oil, filters, diesel particulate filters, DEF systems and fuel system work. Bobcat says the T7X battery "requires no maintenance for the life of the machine" apart from charging. Ask the dealer for a written planned-maintenance quote for both machines rather than relying on a percentage.

Battery warranty and replacement. Ask what the battery warranty covers, for how many years and hours, and what a replacement pack costs today. That is the biggest unknown in resale value.

Charging. Bobcat's 12-hour charge assumes a 240-volt, 40-amp circuit. Volvo's fast charge needs 400-volt, 32-amp power. If the site will not have suitable power near the laydown area, you need a plan for where the machine charges, and any portable charging hardware becomes part of the cost.

You can run this with your own inputs in our equipment cost recovery calculator.

Where Electric Makes the Most Sense

Without sourced billing rates, we have removed the original article's claims about specific savings on indoor work and noise-restricted jobs. The logic is still straightforward:

Indoor and enclosed work. Battery machines produce no engine exhaust. In occupied buildings, hospitals, food plants and enclosed structures, that can be the difference between using a machine and doing the work by hand, regardless of cost per hour.

Noise-limited and night work. Local ordinances set construction noise limits and hours. Check the actual limit and the machine's published ISO noise ratings before assuming an electric machine will be permitted.

Owner and contract requirements. Some public owners and large private owners now ask for low- or zero-emission equipment in bids. Read the specification; if it is a scored criterion, it can outweigh the cost-per-hour math.

Incentives. California's Clean Off-Road Equipment Voucher Incentive Project (CORE), run for the California Air Resources Board, helps offset the cost of zero-emission off-road equipment through point-of-sale vouchers. CARB's program page says CORE will open for new voucher requests in the fourth quarter of 2026, and that extra funding is available for charging infrastructure and small businesses. Voucher amounts vary by equipment type; check the current implementation manual. Outside California, ask your utility and state energy office what they offer. The original article's "$25,000 to $100,000-plus" voucher range and "a dozen states" claim were not sourced.

Where diesel still fits better. Long, continuous production digging on remote sites without power, where a battery would run down mid-shift and there is nowhere to charge, is still a poor fit for current compact electric machines.

Rent Before You Buy

Rental shifts the battery-life and resale risk to someone else and lets you use an electric machine only on the jobs where it pays. The American Rental Association forecasts that the combined U.S. construction and industrial equipment and general tool rental industry will grow 3.4% in 2026 to $83.5 billion, according to an August 26, 2026 report in Compact Equipment. Call your rental branches for current electric machine availability and rates; the original article's weekly rates and claims about specific fleet purchases were not sourced. Our analysis of the equipment rental market covers rental pricing more broadly.

Frequently Asked Questions

How much does it cost to charge an electric mini excavator?

Using the Volvo ECR25 Electric's published 20 kWh battery and the EIA's July 2026 average commercial electricity price of 14.53 cents per kWh, a full charge costs about $2.91 before charger losses. Your rate may be higher or lower depending on your utility and rate schedule.

Is electric equipment cheaper to run per hour than diesel?

On energy alone, usually yes at current prices. Diesel averaged $6.18 a gallon at retail in the week of October 12, 2026 (EIA), and a published-spec electric compact machine costs roughly $1 to $2 an hour in electricity at average commercial rates. Total cost per hour also depends on the purchase price difference, utilization, maintenance and battery life, so run the full comparison with dealer quotes.

How long does an electric compact machine run on a charge?

Manufacturers' published figures: up to 4 hours for the Volvo ECR25 Electric (20 kWh), depending on application, and up to six hours of continuous runtime for the Bobcat T7X (72.6 kWh).

How long does charging take?

Bobcat lists 12 hours for the T7X on a 240-volt, 40-amp outlet. Volvo lists about 5 hours onboard on 230-volt, 16-amp power for the ECR25 Electric, or about 50 minutes to 80% with an offboard charger on 400-volt, 32-amp power.

Are there rebates for electric construction equipment?

In California, the CORE voucher program offsets part of the cost of zero-emission off-road equipment; CARB says it opens for new requests in the fourth quarter of 2026. Other states and utilities run their own programs. Check with your utility and state energy office.

Are electric machines quiet?

Quieter than diesel in use, but check the published ratings. Bobcat's spec sheet lists the T7X at 92.7 dB bystander noise (ISO 6395) and 65.4 dB at the operator position.