If you need to charge batteries, run electronics, or power AC equipment from your work van, an inverter can turn the vehicle's 12-volt DC electrical power into usable AC power.
The important question is not simply, "What is the biggest inverter I can install?" It is how much power your equipment actually requires and whether your vehicle's electrical system can support that demand.
Holman offers pure sine wave inverters in 600W, 1000W, 2000W, and 3000W models. Smaller models may be appropriate for chargers, laptops, diagnostic equipment, and other lighter electrical loads, while higher-demand applications may require a 2000W or 3000W inverter.
Quick Answer: Which Holman Inverter Should You Consider?
Start by identifying everything you may need to power at the same time. Then compare both the normal running wattage and any startup or surge demand.
| Typical Need | Holman Inverter to Consider |
|---|---|
| Laptops, tablets, chargers, and smaller electronics | 600W |
| Multiple chargers, electronics, and moderate AC loads | 1000W |
| Higher-demand tools or equipment | 2000W |
| Higher combined loads or demanding mobile-work applications | 3000W |
Important: This is a starting point, not a guarantee that a particular tool will operate on a particular inverter. Always compare the equipment's continuous wattage and startup demand with the inverter's capabilities before choosing a model.
What Does an Inverter Do in a Work Van?
A power inverter converts the van's DC electrical power into AC power that can be used by equipment normally plugged into a standard electrical outlet.
This can be useful for contractors and service technicians who need power while working away from a building or shore-power connection.
Depending on the electrical requirements, an inverter may be used for:
- Battery chargers.
- Laptops and tablets.
- Diagnostic equipment.
- Printers and mobile-office equipment.
- Small electrical devices.
- Certain power tools.
- Pumps, compressors, or other equipment when their electrical requirements are within the inverter and vehicle system's capacity.
An inverter can make a work van more self-contained, but it does not create energy on its own. The battery and charging system still have to supply the power being used.
Why Choose a Pure Sine Wave Inverter?
Holman's current inverter lineup uses pure sine wave output.
Pure sine wave power more closely resembles the AC waveform supplied by utility power than modified sine wave output. This makes it a practical choice for work vans carrying a mixture of electronics, chargers, electronically controlled equipment, and compatible tools.
If your van carries laptops, diagnostic equipment, smart chargers, or other electronics, using pure sine wave output also removes much of the uncertainty about whether the equipment is designed to operate from modified sine wave power.
How Do You Choose the Right Inverter Size?
1. List What You Want to Power
Start with the equipment you realistically expect to operate from the inverter. For each item, find its rated wattage or electrical consumption from the product label, manual, or manufacturer specifications.
If several devices may operate simultaneously, add their power requirements together.
For example, a service technician may need to run:
- Two battery chargers.
- A laptop.
- Diagnostic equipment.
- A printer.
Another contractor may want to operate a higher-demand tool while chargers or electronics remain connected. Those two situations may require very different inverter sizes.
2. Check Startup Surge, Not Just Running Watts
This is especially important with equipment containing motors.
Some tools, pumps, compressors, vacuums, and similar devices require more power for a short period when they start than they consume once they are running.
That means equipment with a normal operating wattage below the inverter's rating may still exceed its capability during startup.
Before ordering, check both:
- Continuous or running wattage.
- Startup or surge requirement.
3. Consider What May Run at the Same Time
A common sizing mistake is calculating each device individually while overlooking simultaneous use.
A 1000W inverter does not provide 1000W to every connected outlet independently. All connected loads contribute to the total demand on the inverter.
Think about the actual workday:
- Will technicians charge batteries while using a laptop?
- Will another device remain connected while a tool starts?
- Could two employees plug equipment in at the same time?
Sizing around actual use is more useful than choosing wattage based on one tool alone.
Holman 600W vs. 1000W vs. 2000W vs. 3000W
Holman 600W Pure Sine Wave Inverter
The 600W model is a logical starting point when the van primarily needs AC power for lighter electrical loads.
It may be appropriate for:
- Mobile service technicians.
- Inspectors.
- Telecom technicians.
- Laptop and tablet charging.
- Smaller battery chargers.
- Diagnostic equipment.
- Other relatively low-wattage electronics.
For a vehicle that mainly needs a convenient AC power source rather than higher-demand tool power, a smaller inverter may avoid paying for capacity that will rarely be used.
View Holman 600W Pure Sine Wave Inverter ?
Holman 1000W Pure Sine Wave Inverter
The 1000W model provides additional capacity for technicians who operate several smaller devices or have moderate AC power requirements.
It may make sense when a van carries:
- Multiple chargers.
- Mobile-office equipment.
- Diagnostic equipment.
- Electronics.
- Other compatible moderate electrical loads.
The 1000W model and larger Holman inverters also provide an auxiliary connection for an additional outlet, which can be useful when AC power needs to be accessible from another part of the cargo area.
View Holman 1000W Pure Sine Wave Inverter ?
Holman 2000W Pure Sine Wave Inverter
A 2000W inverter is better suited to applications with higher electrical demand, provided the vehicle's battery, charging system, wiring, and installation are designed to support it.
Possible users include:
- Electricians.
- HVAC technicians.
- Plumbing and mechanical service technicians.
- General contractors.
- Fleet service vehicles.
A 2000W rating does not automatically mean every power tool will work. Motor-driven equipment may have substantial startup demand, so the actual equipment specifications still need to be checked.
View Holman 2000W Pure Sine Wave Inverter ?
Holman 3000W Pure Sine Wave Inverter
The 3000W model provides the highest output of the four Holman models discussed here.
It may be appropriate when a commercial vehicle needs to support larger combined electrical loads or higher-demand equipment.
At this level, the inverter should be considered part of the van's complete electrical system rather than a stand-alone accessory. Battery capacity, charging capability, wiring, circuit protection, installation location, and ventilation all become especially important.
Choosing the 3000W model simply because it is the largest option is not necessarily the best approach. Choose it when your calculated electrical demand justifies the additional capacity.
What Features Do the Holman Inverters Include?
Current Holman pure sine wave inverter listings include features such as:
- Pure sine wave AC output.
- Two GFCI receptacles.
- USB charging connection.
- LCD display.
- Connection for an optional remote switch.
- Over-temperature protection and shutdown.
- Overload shutdown.
- Under-voltage and over-voltage protection.
- Short-circuit warning.
- Mounting hardware.
Holman also provides an auxiliary port for adding an additional outlet on the 1000W, 2000W, and 3000W models.
The best configuration depends on where technicians actually need power inside the van.
Do I Need to Upgrade My Van's Battery or Charging System?
Possibly.
The inverter is only one component of the electrical system. Higher AC output requires more DC current from the vehicle's electrical system.
Before installing an inverter, evaluate:
- Battery capacity.
- Battery type and condition.
- Alternator or other charging capacity.
- Expected run time.
- Cable length and cable size.
- Fuse and circuit-protection requirements.
- Inverter mounting location.
- Ventilation.
- Whether loads will operate with the engine running or while parked.
A large inverter connected to an electrical system that cannot adequately support it may not provide the performance you expect.
This is why inverter selection should begin with the equipment being powered rather than simply selecting the largest wattage from a product list.
Where Should an Inverter Be Installed in a Work Van?
The inverter should be mounted in a secure location with proper ventilation and appropriate electrical connections.
Potential locations may include areas near:
- Van shelving.
- A workbench.
- A partition.
- Dedicated electrical equipment.
- Other accessible cargo-area locations.
The exact location should be based on the vehicle layout and installation requirements.
Higher-current DC wiring also makes cable routing important. Do not assume the inverter can be placed anywhere in the cargo area without considering cable length, wiring requirements, and ventilation.
Which Work Vans Can Use a Holman Inverter?
Holman inverter options are relevant to common commercial vans including:
- Ford Transit.
- RAM ProMaster.
- Mercedes-Benz Sprinter.
- Chevrolet Express.
- GMC Savana.
Unlike many shelves, partitions, and ladder racks, inverter compatibility depends heavily on the electrical installation, not simply the dimensions of the cargo area.
Vehicle year, engine, battery configuration, charging system, electrical options, and installation design can affect the correct setup.
Who Is a Van Inverter Best For?
A properly sized inverter may be especially useful for professionals who regularly need electrical power between stops or at jobsites.
Electricians
An electrician may use an inverter for chargers, testing equipment, electronics, or compatible tools while keeping commonly used equipment ready inside the van.
HVAC and Plumbing Technicians
HVAC and plumbing service vehicles often carry chargers, diagnostic equipment, pumps, electronics, and tools with very different electrical demands.
For these trades, checking startup surge can be especially important when motor-driven equipment is involved.
Mobile Service Technicians
Service technicians working from a van may rely heavily on laptops, diagnostic equipment, printers, chargers, and other relatively modest AC loads.
A 600W or 1000W inverter may sometimes make more sense than installing a higher-output system that the technician does not need.
Commercial Fleets
Fleet operators may benefit from establishing a standard inverter configuration for vehicles performing similar jobs.
However, standardization should follow the duty cycle. A mobile inspection vehicle and an HVAC service vehicle may have very different power requirements even if both use the same van model.
Who May Not Need a Large Inverter?
A 2000W or 3000W inverter is not automatically the best choice for every work van.
A smaller inverter may be more appropriate when the van primarily needs to charge electronics, battery packs, and diagnostic equipment.
Some users may also be better served by a different power solution if they need:
- Very high continuous AC loads.
- Long periods of operation with the engine off.
- Equipment with startup demand beyond the inverter's capability.
- A large amount of stored electrical energy.
- Shore-power integration.
- Specialized electrical equipment.
The correct solution depends on the load, duty cycle, vehicle, and how the van is used.
Common Inverter Sizing Mistakes
Choosing Based Only on Maximum Wattage
More capacity is not automatically better. Start by calculating what you actually need.
Ignoring Startup Surge
Motor-driven equipment may require significantly more power when starting than during normal operation.
Ignoring the Battery and Charging System
The inverter converts power; it does not supply the underlying energy. The van's electrical system must support the load.
Running Too Many Devices at Once
All connected equipment contributes to the total electrical load.
Treating Every Van the Same
Two Ford Transits, Sprinters, or other commercial vans can have different electrical configurations and different equipment demands.
Overlooking Installation Requirements
Wire size, circuit protection, cable routing, ventilation, and secure mounting are part of choosing the system, not details to consider only after purchasing the inverter.
Frequently Asked Questions
What size inverter do I need for my work van?
Add the continuous wattage of everything you expect to operate at the same time, then check the startup or surge requirements of equipment with motors or other high-starting loads. The vehicle's electrical system also needs to support the required DC power.
Is a 600W inverter enough for a service van?
It may be if the primary loads are laptops, electronics, chargers, diagnostic equipment, and other lower-wattage devices. Check the actual wattage of the equipment before deciding.
Should I choose a 2000W or 3000W inverter for power tools?
That depends on the specific tools. Check both running wattage and startup surge rather than choosing based only on the inverter's advertised wattage.
What is the advantage of a pure sine wave inverter?
Pure sine wave output more closely resembles utility-supplied AC power and is generally a good choice when a work van powers a mixture of electronics, chargers, electronically controlled equipment, and compatible tools.
Can I add another AC outlet?
Holman's 1000W, 2000W, and 3000W models include an auxiliary connection for an additional outlet. The complete electrical installation still needs to remain within the inverter's rated capacity.
Does the inverter prevent battery drain?
Holman inverter systems include ignition-sense functionality intended to help manage operation with the vehicle. The complete battery and charging strategy should still be evaluated for the intended application, especially for higher loads or extended use.
Can a Holman inverter replace a generator?
For equipment that falls within the inverter and vehicle electrical system's capabilities, an inverter may eliminate the need for a separate generator for some jobs. High continuous loads, long run times, or large startup demands may require a different power solution.
Does a Holman inverter fit my Ford Transit, ProMaster, Sprinter, Express, or Savana?
The correct electrical installation depends on the specific vehicle and its electrical configuration. Confirm the vehicle application, battery and charging system, and installation requirements before ordering.
Need Help Choosing a Work Van Inverter?
The best inverter is the one that matches the equipment you actually use, not necessarily the largest model available.
Before ordering, make a list of the tools, chargers, electronics, and other equipment you want to power. Note which devices may operate at the same time and identify any equipment with substantial startup demand.
Work Van Equipment can help you compare Holman 600W, 1000W, 2000W, and 3000W pure sine wave inverters and determine which option makes the most sense for your vehicle and workflow.
Shop Holman Inverters Browse Holman Equipment
Need help confirming the right inverter? Contact Work Van Equipment with your vehicle information and a list of the equipment you plan to power so the application can be reviewed before ordering.
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