Article

Run Your Existing Excavator on Electric Power — Without Giving Up Diesel Mobility

Excavators are among the most important machines in construction, infrastructure, mining, ports, scrap handling, bulk material handling and industrial applications. But for machines operating for long hours at a fixed or semi-fixed location, diesel fuel can become one of the largest components of operating cost.

To address this challenge, Servoday Plants & Equipments Limited has introduced a Retrofit Electric Excavator System that converts a conventional diesel crawler excavator into a dual-power excavator capable of operating on both electric power and diesel.

The concept is simple:

Electric when the excavator is working at a fixed location.
Diesel when the excavator needs mobility.

This approach allows owners to reduce diesel consumption while retaining the original mobility and flexibility of the excavator.

Why Convert a Diesel Excavator to Electric?

A conventional diesel excavator can consume a significant quantity of fuel during long operating hours. This becomes particularly important in applications where the machine remains in one working zone for most of the day.

Typical examples include:

• Scrap yards
• Steel plants
• Ports and jetties
• Coal handling areas
• Biomass yards
• Waste handling facilities
• Cement plants
• Mining stockyards
• Aggregate yards
• Railway material handling
• Industrial material handling
• Fixed-boom material handling
• Loading and unloading operations

When the machine is working continuously at one location, repeatedly running a diesel engine may not always be the most economical operating arrangement.

A properly engineered electric retrofit can allow the hydraulic system to be powered by an electric motor while the diesel engine remains available for travelling and applications where electrical power is not available.

Dual-Mode Operation: Electric + Diesel

The major advantage of our retrofit concept is that the machine does not have to become electric-only.

The excavator can be configured for:

1. Electric Mode

The hydraulic system is powered by an electric motor.

This mode is suitable for long-duration operation at a fixed or semi-fixed workplace.

2. Diesel Mode

The original diesel engine remains available for machine movement, relocation and areas where electric power is unavailable.

3. Electric + Diesel Flexibility

The owner therefore gets the flexibility of two operating modes from one excavator.

Work continuously on electricity where power is available.
Move the machine using diesel when required.

Fuel Saving Up to 65% — Application Dependent

Our retrofit system is designed to substantially reduce diesel consumption when the excavator is operated in electric mode.

Fuel saving can be up to approximately 65% compared with conventional diesel operation in suitable applications.

Actual savings depend on:

• Excavator model
• Hydraulic load
• Working cycle
• Operating hours
• Diesel fuel price
• Electricity tariff
• Electric motor efficiency
• Pump efficiency
• Operator behaviour
• Duty cycle
• Idle time
• Site conditions

Therefore, the actual saving should be established through a machine-specific energy and operating-cost calculation before installation.

Easy Return on Investment

One of the biggest advantages of electric conversion is the possibility of recovering the retrofit investment through operating-cost savings.

The basic calculation is:

Annual Diesel Saving = Diesel Saved per Hour × Operating Hours per Year × Diesel Price

And:

Annual Energy Cost = Electricity Consumption per Hour × Operating Hours per Year × Electricity Tariff

Therefore:

Annual Operating Saving = Diesel Operating Cost − Electric Operating Cost

Approximate payback:

Payback Period = Retrofit Investment ÷ Annual Operating Saving

The more hours the machine operates every day, the greater the potential benefit from electric operation.

For machines working 8, 12, 16 or even 20+ hours per day, the economics can become particularly attractive when electricity is available at a competitive industrial tariff.

A proper site-specific ROI calculation should always be prepared using actual diesel consumption, electricity tariff, machine loading and annual operating hours.

No Need to Send Your Excavator to Our Factory

This is one of the most important advantages of our new retrofit approach.

Traditionally, if a machine has to be transported to a workshop or manufacturer facility for electrical conversion, the customer may have to deal with:

• Transportation cost to the factory
• Transportation cost back to the site
• Loading and unloading
• Machine idle time
• Production loss
• Accommodation and other logistical issues
• Long installation schedules

Depending on the machine and scope of work, a conventional factory-based conversion can result in a substantial period during which the customer\’s machine is unavailable.

Now We Bring the Retrofit System to Your Site

With our on-site electric excavator retrofit solution, installation can be carried out at the customer\’s location using suitable workshop tools and trained manpower.

Our target installation period can be approximately 10 days at site, subject to:

• Machine condition
• Model and configuration
• Availability of electrical supply
• Required motor and drive system
• Fabrication requirements
• Hydraulic arrangement
• Site accessibility
• Safety requirements
• Availability of necessary components

This can potentially eliminate a major portion of the transportation and machine-idle period associated with sending the excavator to a factory.

Your machine stays at your site.

Your machine can return to productive operation faster.

You avoid unnecessary two-way transportation.

You can continue earning from the machine instead of keeping it idle for a long workshop period.

Installation at Your Site

Our retrofit philosophy is based on minimum disruption to the customer\’s operation.

The conversion system is engineered around the existing excavator architecture wherever technically suitable.

The installation may include:

• Electric motor
• Motor mounting arrangement
• Coupling / drive arrangement
• Hydraulic pump interface
• VFD / motor control system
• Main electrical panel
• MCCB
• Contactors
• Protection relays
• Control relays
• Emergency stop system
• Operator controls
• Push buttons
• Potentiometer
• Digital/analog indicators
• Cable harness
• Industrial connectors
• Cooling system
• Safety interlocks
• Earth leakage protection
• Remote monitoring system
• Trailing cable arrangement
• Cable protection and routing

The exact design is finalized after inspecting the excavator and understanding its hydraulic system and application.

Standard Cable Harness and Professional Electrical Wiring

A reliable retrofit is not simply about installing a motor.

The electrical system must be properly designed, protected, routed and documented.

Our retrofit package can incorporate a structured electrical wiring system with:

• Standardized cable harness
• Industrial-grade cables
• Proper cable glands
• Heavy-duty connectors
• Ferruling and identification
• Control wiring
• Power wiring
• Earth connections
• MCCB protection
• Short-circuit protection
• Overload protection
• Earth-leakage protection
• Emergency-stop circuits
• Interlocking
• Panel cooling
• Cable routing and mechanical protection

This helps make troubleshooting, servicing and future maintenance easier.

Genuine Electrical Components from Established Brands

Depending on availability, voltage, motor rating, VFD selection and project requirements, the retrofit can be engineered using established industrial electrical brands such as:

Switchgear & Protection

• Schneider Electric
• ABB
• Siemens
• Eaton
• L&T
• Socomec

VFD / Motor Drive

• ABB
• Siemens
• Schneider Electric
• Danfoss
• Yaskawa
• INVT
• CG / CG Power
• Other technically suitable approved brands

Motors

Depending on application and rating:

• ABB
• Siemens
• CG Power
• Bharat Bijlee
• WEG
• Kirloskar Electric
• Other suitable industrial motor manufacturers

Control Components

• Schneider Electric
• Siemens
• ABB
• Omron
• Eaton
• Phoenix Contact
• Weidmüller
• Other suitable industrial-control brands

The final component selection depends on the electrical rating, machine configuration, environmental conditions, availability, service support and customer specification.

VFD-Controlled Electric Drive

The electric motor can be controlled through a suitable Variable Frequency Drive (VFD).

The VFD allows controlled adjustment of motor speed according to operating requirements.

Benefits may include:

• Smooth motor starting
• Controlled acceleration
• Adjustable RPM
• Reduced mechanical shock
• Better control of hydraulic pump speed
• Improved operating efficiency
• Motor protection
• Fault monitoring
• Reduced starting current compared with direct-on-line starting
• Better control according to machine load

The operating RPM can be adjusted according to the hydraulic system and required performance.

Smooth and Silent Electric Operation

Compared with a diesel engine running continuously, electric operation can provide a significantly different working environment.

The electric mode can offer:

• Lower engine noise
• Reduced vibration associated with diesel engine operation
• Smooth power delivery
• No diesel exhaust from the electric drive itself
• Better suitability for enclosed or semi-enclosed industrial environments
• Reduced local emissions during electric operation

This can be particularly useful in factories, warehouses, ports, scrap yards and industrial premises where noise and exhaust emissions are important considerations.

Electric-Shock Protection and Safety Controls

Electrical conversion must be designed with safety as a primary consideration.

The retrofit system can include:

• MCCB protection
• Earth-leakage relay
• Proper earthing
• Emergency-stop push button
• Electrical interlocks
• Control-circuit protection
• Properly rated cables
• Industrial connectors
• Panel protection
• Motor overload protection
• Phase-failure protection
• Over/under-voltage protection
• Over-temperature monitoring
• Safe isolation provisions

The machine should be operated only after proper commissioning, insulation testing, earthing verification and safety checks.

Mobility with Trailing Cable

A common concern with an electric excavator is mobility.

Our dual-power concept addresses this by retaining diesel operation for movement where required.

For electric operation, a suitable trailing cable management arrangement can be provided according to the site layout.

Depending on the application, the system can incorporate:

• Heavy-duty flexible cable
• Industrial plug and socket
• Cable drum / management system
• Cable protection
• Cable routing
• Operator warning system
• Proper earthing
• Emergency isolation

The cable arrangement should always be designed according to machine movement, operating radius, voltage, current and site safety requirements.

Real-Time Excavator Monitoring

An advanced retrofit system can also incorporate IoT-based remote machine monitoring.

The owner can monitor important operating parameters from a mobile phone or authorized remote dashboard.

Depending on the selected monitoring package, parameters may include:

Machine Status

• Machine ON/OFF
• Electric mode / diesel mode
• Operating hours
• Running hours
• Idle hours

Electrical Parameters

• Voltage
• Three-phase voltage
• Current / Ampere
• kW
• Power factor
• Frequency
• Energy consumption in kWh
• Motor load
• VFD status
• Electrical faults

Temperature Monitoring

• Electric motor temperature
• Hydraulic oil temperature
• Electrical panel temperature
• Control cabinet temperature
• Cabin temperature

Safety Monitoring

• Earth leakage
• Emergency-stop status
• Electrical fault status
• Overload condition
• High-temperature alarm
• Phase-failure alarm
• Other configured protection alarms

Mobile Alerts and Remote Notifications

The monitoring system can be configured to send alerts to authorized users.

For example:

Machine Started

Machine Stopped

High Motor Temperature

High Hydraulic Oil Temperature

High Electrical Load

Earth Leakage Detected

VFD Fault

Emergency Stop Activated

Abnormal Voltage

Excessive Current

This gives the owner greater visibility over machine operation without needing to physically stand beside the excavator.

Remote Emergency Stop

Where technically and legally appropriate, the monitoring architecture can also support a remote emergency-stop command.

This feature should be engineered with appropriate safety architecture and must not be treated as a replacement for the machine\’s local emergency-stop and isolation systems.

The objective is to provide an additional layer of remote supervision and intervention.

Easy to Install

The retrofit system is designed around a practical field-installation philosophy.

Instead of completely redesigning the excavator, the conversion is engineered around the existing machine wherever feasible.

This can reduce:

• Installation complexity
• Machine transportation
• Downtime
• Fabrication requirements
• Commissioning time

Every excavator is different, so a detailed inspection is required before finalizing the retrofit design.

Easy to Operate

The operator should not need to become an electrical engineer to operate the converted excavator.

The control system can be designed around simple controls such as:

• Start / Stop
• Electric / Diesel selection
• Emergency Stop
• RPM adjustment
• Status indicators
• Fault indication
• Motor temperature indication
• Electrical load indication
• Safety interlocks

The goal is to keep the operator interface simple and familiar.

Easy Maintenance

A well-designed electrical drive system can simplify maintenance by reducing the number of conventional diesel-engine-related service requirements during electric operation.

Electric mode can reduce the need for continuous:

• Diesel fuel consumption
• Engine oil consumption
• Engine idling
• Fuel-filter servicing associated with electric-mode hours
• Diesel engine running hours

However, the original diesel engine, hydraulic system, undercarriage, swing mechanism and other excavator components still require regular preventive maintenance.

Long Service Life

The retrofit system is designed using appropriately rated industrial components selected for the machine\’s operating environment.

Long service life depends on:

• Correct component sizing
• Proper electrical protection
• Correct motor selection
• Correct VFD selection
• Good cable management
• Proper cooling
• Good earthing
• Hydraulic system condition
• Preventive maintenance
• Operator practices
• Environmental conditions

The objective is to achieve reliable long-term operation rather than simply installing an electric motor.

High-Speed Cooling Fans

Electrical and control equipment generates heat, particularly in demanding industrial environments.

The retrofit system can therefore incorporate high-performance cooling fans and suitable panel ventilation/cooling arrangements.

Temperature monitoring can also be integrated into the control and monitoring system.

This helps protect:

• VFD
• Electrical panel
• Motor
• Control components
• Power electronics

Suitable for Fixed and Semi-Fixed Applications

Electric conversion is particularly interesting where an excavator spends most of its operating hours in a defined area.

Typical applications include:

Ports & Bulk Handling

• Coal handling
• Biomass handling
• Fertilizer handling
• Mineral handling
• Bulk material loading/unloading

Scrap & Steel Industry

• Scrap handling
• Steel-yard operations
• Furnace-area material handling
• Stockyard operations

Biomass & Renewable Energy

• Biomass feeding
• Wood chip handling
• Pellet plant raw-material handling
• Agro-residue handling

Mining & Aggregates

• Stockpile handling
• Crusher feeding
• Material loading
• Yard operations

Waste Management

• Waste sorting
• Waste handling
• Transfer stations
• Material recovery operations

Which Excavators Can Be Converted?

The retrofit concept can be considered for many crawler excavators and material-handling excavators, subject to detailed technical inspection.

Major manufacturers with relevant crawler-excavator product families include:

Caterpillar

Examples include:

• Cat 313
• Cat 315
• Cat 317
• Cat 319
• Cat 320
• Cat 323
• Cat 325
• Cat 326
• Cat 330
• Cat 335
• Cat 336
• Cat 340
• Cat 350
• Cat 352
• Cat 374
• Cat 395

Komatsu

Examples include:

• PC205
• PC210
• PC210LC
• PC220
• PC270
• PC300
• PC300LC
• PC350
• PC350LC
• PC390
• PC400
• PC450
• PC600
• PC800
• PC850
• PC950

Volvo Construction Equipment

Examples include:

• EC210
• EC220
• EC300
• EC380
• EC480
• EC550
• EC650
• EC750
• EC950

Hitachi

Potentially applicable families include:

• ZX210
• ZX220
• ZX240
• ZX300
• ZX350
• ZX490
• ZX530
• ZX670
• Larger ZX mining/excavator models

Hyundai Construction Equipment

Examples include:

• HX210
• HX220
• HX300
• HX350
• HX380
• HX480
• Larger HX-series machines

JCB

Potentially applicable JS-series crawler excavators include:

• JS205
• JS210
• JS220
• JS235
• JS305
• JS330
• JS370

SANY

Examples include:

• SY210
• SY215
• SY220
• SY225
• SY230
• SY240
• SY260
• SY350
• SY365
• SY380
• SY390

Kobelco

Examples include:

• SK140
• SK145
• SK220
• SK220XD
• SK380XD
• SK520XD
• SK850

Liebherr

Examples include:

• R920
• R922
• R924
• R926
• R928
• R930
• R934
• R938
• R940
• R945
• R950
• R960
• R972
• R978
• R992
• R998

Important: The model list above is an indicative list of crawler-excavator families and is not a statement that every listed model is automatically compatible with the retrofit. Final compatibility depends on the exact model, manufacturing year, hydraulic pump arrangement, engine configuration, available space, required hydraulic power, electrical supply and intended duty cycle.

How the Retrofit Works

A typical retrofit architecture consists of:

Incoming Electrical Supply

↓

Main Isolator / MCCB

↓

Electrical Protection & Control Panel

↓

VFD / Motor Controller

↓

Electric Motor

↓

Mechanical Coupling / Drive Arrangement

↓

Hydraulic Pump

↓

Existing Excavator Hydraulic System

↓

Boom + Arm + Bucket + Swing + Travel Functions

The original diesel engine can remain available for diesel operation, subject to the selected dual-drive mechanical and hydraulic configuration.

The actual engineering arrangement varies from machine to machine.

What We Need Before Quoting a Retrofit

For accurate engineering and commercial quotation, we normally require information such as:

• Excavator make
• Exact model
• Manufacturing year
• Engine rating
• Hydraulic pump details
• Main pump flow
• Hydraulic pressure
• Existing engine RPM
• Diesel fuel consumption
• Machine photographs
• Engine compartment photographs
• Hydraulic pump photographs
• Available mounting space
• Application
• Average working hours/day
• Required electric operating hours/day
• Site electrical voltage
• Available transformer capacity
• Cable distance from electrical panel to machine
• Required mobility radius
• Working environment

This information helps determine the correct:

Motor kW + VFD rating + electrical panel + cable size + protection system + cooling arrangement + mechanical coupling + monitoring system.

Why Choose a Site-Based Retrofit?

Conventional Approach

Excavator → Transport → Factory → Retrofit → Commissioning → Transport Back → Site

This can involve considerable transportation, downtime and machine-idle costs.

Our Site Retrofit Approach

Excavator remains at your site → Retrofit team arrives → Installation → Testing → Commissioning → Production

This approach can significantly reduce unnecessary transportation and downtime.

The Real Business Benefit

The biggest benefit is not simply replacing diesel with electricity.

The real objective is to reduce the cost of every productive operating hour while retaining the flexibility of a diesel excavator.

You can potentially achieve:

Lower diesel consumption

• Lower operating cost
• Reduced diesel engine running hours
• Electric-mode operation
• Retained diesel mobility
• Remote monitoring
• Reduced site downtime
• Better operational visibility

= A more flexible and potentially more economical excavator

Why Buy a New Electric Excavator When You Already Own a Good Diesel Machine?

If the existing excavator has:

• Good hydraulic condition
• Good undercarriage
• Good structure
• Good attachment
• Good swing system
• Good overall mechanical condition

then replacing the entire machine may not always be necessary.

A retrofit can allow the owner to upgrade the power source while retaining the existing machine platform.

This can potentially extend the productive life of an existing excavator while reducing operating expenditure.

From Diesel Excavator to Smart Electric Excavator

The next generation of retrofit is not simply:

Diesel → Electric Motor

It is:

**Diesel Excavator

• Electric Drive
• VFD
• Safety System
• Smart Monitoring
• Remote Alerts
• Energy Monitoring
• Dual-Mode Operation**

This transforms an existing excavator into a more connected and energy-conscious machine.

Servoday Retrofit Electric Excavator

Servoday Plants & Equipments Limited brings its engineering and industrial equipment experience into the field of electric excavator conversion with a practical objective:

Convert your existing excavator.

Operate on electricity where practical.

Retain diesel mobility.

Reduce diesel consumption.

Monitor the machine remotely.

Reduce unnecessary downtime.

Improve operating-cost visibility.

Electric + Diesel = Flexibility

Retrofit + Remote Monitoring = Smart Operation

Lower Diesel Consumption + High Utilization = Potentially Faster ROI

Important Disclaimer

Brand and model names such as Caterpillar, Komatsu, Volvo, Hitachi, Hyundai, JCB, SANY, Kobelco, Liebherr, ABB, Siemens, Schneider Electric, Danfoss, Yaskawa, Eaton, Omron, L&T, CG Power, WEG, Bharat Bijlee, Kirloskar Electric, Phoenix Contact and Weidmüller are trademarks or registered trademarks of their respective owners.

The mention of any third-party brand or model in this article is for identification, compatibility discussion and technical reference only and does not imply any affiliation, dealership, authorization, endorsement or partnership with Servoday Plants & Equipments Limited unless specifically stated.

Electrical component brands are examples of possible industrial-grade components. The final brand selection may vary according to project requirements, availability, technical specifications, customer preference and service support.

Not every excavator model listed is necessarily suitable for conversion. Final retrofit feasibility, motor rating, hydraulic configuration, electrical architecture, safety system and expected performance must be established through a machine-specific technical survey.

Fuel saving of up to 65% is an indicative maximum claim for suitable operating conditions and should not be interpreted as a guaranteed saving for every machine or application.

Installation duration of approximately 10 days at site is an indicative target and may vary depending on machine condition, model, scope of conversion, site readiness, electrical infrastructure and fabrication requirements.

All electrical installation, earthing, protection, isolation and commissioning should be performed by qualified personnel in accordance with applicable safety standards and local regulations.

Servoday Plants & Equipments Limited reserves the right to modify the retrofit design, component selection and technical configuration according to the specific excavator and application.

📞 Contact Us – Electrify Your Excavator & Loader

🏢 Servoday Plants & Equipments Limited
📍 Jamnagar, Gujarat, India

📞 Phone: +91 9427210483 | +91 9427210484
📧 Email: sanjay@servoday.in
🌐 Website: www.ElectricExcavator.in

👤 Contact Person: Sanjay Masuria
📲 WhatsApp: +91 9427210483

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