When the mains power fails, Neargrid automatically switches to UPS mode.
The battery immediately takes over the entire power supply without any dip or interruption. Neargrid systems offer autonomy of 4 to 20 hours, depending on the model and consumption. The UPS function switches over immediately in the event of a power failure, allowing the crane to continue operating without interruption. This prevents downtime costs and protects your schedule. Your machines continue to run and your construction site is unaffected by the power failure. During the power outage, the battery provides several hours of autonomy. Site management automatically receives notifications about battery level and status, while our remote team monitors all parameters. This creates a safe time window in which the power failure can be resolved without impacting the construction site. In short: you don't need a backup. Neargrid guarantees power at all times, continuity at all times, and complete peace of mind.

Depending on the version you choose, various other outputs are available on the system. These come in the form of CEE wall sockets 32 or 63 A. Other consumers such as drainage pumps, chain park, lighting, and other tools can be easily connected to these. Our outputs (32A, 63A, 125A, 160A, 250A...) are suitable for all brands and types, from quick-assembly cranes to heavy tower cranes. The system forms a smart microgrid that provides both your tower cranes and all additional consumers with a stable and safe power supply. Thanks to the integrated protection and UPS mode, all consumers continue to operate, even during peak currents or a power outage.
One system, one connection point, complete power security on the entire construction site.

A 32A – 63A mains connection is sufficient to run multiple large consumers. The battery absorbs all peak loads and provides a stable voltage for tower cranes and construction equipment. This means you don't need to request an expensive upgrade.

Neargrid can even be used without a mains connection.
In that case, an alternative energy source such as solar panels or a small hydrogen or diesel generator powers the system. Neargrid turns that source into a stable microgrid that absorbs all peak currents. For tower cranes, a compact generator of approx. 60 kVA is sufficient to keep three cranes fully operational via Neargrid Boost. The generator runs on basic power only, while Neargrid supplies the peak power. Less consumption, less noise, maximum operational reliability.

The connection between a Neargrid battery and the electricity grid is designed to operate fully automatically and without disruption. The system forms a microgrid that works intelligently with the available grid connection, regardless of whether it is strong, weak, or limited.
This is how the connection works, step by step:
1) The grid supplies base power.
The battery continuously reads how much power the grid can supply (e.g., 32A – 63A).
This power is used to its maximum capacity, but never exceeded thanks to our smart power control.
2) The battery supplements peak consumption. In the event of sudden peaks, typically with tower cranes (hoisting, slewing, trolley), construction lifts, or heavy machinery, the battery switches on in less than 20 milliseconds. For example: Grid supplies 32A Crane temporarily requires 180A
➡The difference is supplied by the battery → no grid dip, no downtime, no safety devices failing.
This is important because grid voltage often fluctuates on construction sites. The Neargrid stabilizes it completely.
3) Stable voltage, constant power
The inverters within the Neargrid form their own stable sine wave (microgrid-forming).
Even if the grid is of poor quality, the load (cranes, pumps, units) remains perfectly powered.
No frequency disturbances
No voltage drops
No error messages
on frequency converters Longer service life of motors and drives
4) UPS mode in the event of a grid failure
If the grid fails, the battery takes over immediately and completely uninterrupted
(UPS function):At least 4 hours of autonomy (depending on model and load)
The site continues to operate without interruption
SMS notifications alert the site manager and our service team
This prevents any form of downtime, the biggest cost factor on large sites.
5) Automatic recharging
When consumption is low, the battery recharges via:
the grid
a small diesel generator
or solar panels
Thanks to smart charging algorithms, the grid is never overloaded.
6) Fully integrated safety features
The Neargrid unit is a fully-fledged substation, with:
adjustable RCD safety features (type B)
selective safety features per output
electronic short-circuit and overcurrent protection
remotely adjustable parameters (switchover times, limits, current curves)
This ensures maximum safety and compatibility with all crane models.

The result: the site always has stable, safe, and reliable power, even on the weakest mains connection.
No dips. No downtime. No surprises.

A Neargrid battery is built to deliver years of reliable performance, with minimal maintenance costs and a long service life. The difference with a traditional diesel generator is enormous: no oil, no filters, no fuel, no soot, no mechanical wear.
Maintenance: minimal & quick to perform
Our systems are designed for plug-and-play use and require only limited maintenance:
1) Biannual filter maintenance
The air filters of the cooling system are cleaned or replaced twice a year.
This is a minor operation that is quick to perform and inexpensive.

Furthermore, no periodic maintenance contracts are required, as is the case with generators.

2) Continuous remote monitoring
All units are connected to the Neargrid Portal via 4G.
This allows you to:
monitor performance live
receive alerts immediately
proactively detect errors
adjust parameters remotely
This solves problems before they impact the site.

3) No wear parts
Unlike a diesel generator, there is:
no combustion engine
no alternator
no oil
no fuel filters
no cooling water or radiator
no mechanical wear
This makes our maintenance costs up to 80% lower than diesel alternatives.
Lifespan: 10 to 15 years
The lifespan of a Neargrid system depends on the yard's usage profile (cycles per day), but is typically between 10 and 15 years.
What determines the lifespan?
battery technology used
cycles per day
temperature and ventilation
charging strategy
Our microgrid architecture and deep discharge protection ensure that the battery never enters harmful zones. This significantly extends its effective lifespan.

TCO: much cheaper than diesel
Due to minimal maintenance and the absence of fuel and overhaul costs, the total cost of Neargrid is significantly lower than diesel generators in practice.
You avoid: fuel costs (4–6 liters per hour per generator)
expensive overhauls
annual maintenance contracts
unexpected downtime
transport & fuel logistics
emission fines or CO₂ performance ladder loss points

The result
- Very low maintenance costs
- 10–15 years of reliable use
- No wear parts
- Less risk of downtime
- Better TCO than diesel generators
- Perfectly predictable operating costs

Based on more than 160 projects, we see: Break-even: 6 to 24 months (depending on the project)
Savings on:
diesel consumption maintenance & repairs of generators
downtime costs
expensive high-consumption connections
fuel logistics
fines/loss points in CO₂ performance ladder
For construction sites with tower cranes and weak grid connections, the ROI is fastest, often within a single long-term project.
With our Energy Planner, we will prepare an accurate ROI report based on your consumption data, free of charge.

Yes. Neargrid is designed to work without hassle.
Connect → press button → done. The LED status bar guides you through the entire start-up process. No specialist knowledge required. Monitoring is done automatically via the Neargrid Portal. SMS alerts warn you in case of grid problems or exceedances.
Site managers no longer have to worry about power, the site just keeps running.

Neargrid is designed as a plug-and-play system. Your own electricians can:
connect the battery to the grid or a site cabinet
connect the consumers to the correct circuits
start up using a simple one-button principle
perform basic checks.
For technical questions or error messages:
Neargrid engineers can log in remotely via 4G and resolve >90% of issues remotely. In case of hardware problems, our service partner or Neargrid technician will come to your location. So you are never on your own, but you remain independently deployable.

A Neargrid battery system has been developed for reliable construction site energy and operates in hybrid mode.

This means that the battery can be charged in several ways, depending on the energy source available on site. This keeps your construction site operational at all times, without downtime and without diesel stress.

Charging via mains connection (most commonly used solution)
The Neargrid battery is charged via a standard 3×400V mains connection.
✔ Even a limited mains connection (32A – 63A) is sufficient
✔ The battery charges and supplies power to tower cranes at the same time
✔ No oversizing of the mains connection required
✔ Fully automatic control

Typical application:
At night or during low load, the battery charges fully via the mains.
👉 Ideal for grid congestion, temporary connections, or inner-city construction sites.
⚡ Charging with a small diesel generator (hybrid construction site)

No grid connection available? Then the Neargrid battery can be charged with a small diesel generator.
This hybrid setup ensures that:
- the generator runs at constant optimal power
- the generator is only needed for a limited time
- fuel consumption and noise are 70–80% lower than with conventional diesel generators

Important:
The generator does not need to deliver peak power.
👉 The battery fully absorbs peak loads from tower cranes.
☀️ Charging with solar energy or renewable sources (optional)

Neargrid batteries can also be charged via:
- solar panels
- other renewable energy sources (AC-coupled)
These sources: usually provide a partial recharge
are particularly suitable as a supplement to the grid or generator
increase the share of emission-free construction power

⏱ How long does it take to charge a construction site battery?
The charging time depends on:
the capacity of the battery (e.g., 150, 240, or 360 kWh)
the available charging capacity (grid connection or generator)
Indicative charging times:
With a 63A grid connection (±40 kVA)
→ full charge in 6 to 10 hours (overnight)
With a higher grid capacity or generator
→ shorter charging time possible
The entire charging process is automatically managed via the Neargrid Energy Management System.

What does this mean for contractors and project managers?
‍Noheavy or expensive grid connection required
No dependence on large diesel generators
No complex energy management on site
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The contractor builds. Neargrid takes care of the power supply.
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The weight of a Neargrid battery varies from 1,700 kg (Compact) to 7,500 kg (Force). Combined with the steel frame and industrial construction, this means that the units cannot be moved without specialized equipment.
In addition, every Neargrid unit is equipped as standard with:
GPS tracking and 4G connectivity
Continuous remote monitoring via the Neargrid Portal
Automatic SMS alerts in the event of unusual movement or tampering

Thanks to this combination of physical robustness and digital monitoring, the risk of theft is negligible in practice.

The total cost of a Neargrid system is significantly lower in practice than diesel generators or a heavy-duty high-consumption connection. Not because the battery is cheaper to purchase, but because it is much cheaper to use, more reliable in operation, and completely avoids downtime costs.

1) Neargrid vs. diesel generator: the actual costs
Diesel seems cheap on paper, but on a construction site the hidden costs are enormous:
What diesel really costs you:
Fuel consumption (4–8 liters/hour per generator)
Rental of one or more generators
Maintenance (filters, oil, coolant, service contracts)
Transport and refueling
Downtime due to malfunctions or empty tanks
Noise and emission restrictions in inner-city areas
Additional costs for night surveillance or sabotage
Low efficiency (5–15%), meaning you pay a lot for relatively ineffective energy

2) Neargrid vs. a high-consumption connection
A high-consumption connection (e.g., 160A – 250A) seems attractive, but
These costs are often underestimated:
Connection fee (one-off, often €20,000 – €60,000)
CAPEX for the site infrastructure (cabin, cabling, security)
Monthly standing charge
Waiting times (4–12 weeks and longer due to grid congestion)
Application and permit procedures
Oversizing (you pay for power that you only need 1–5% of the time)

With Neargrid, you only need one small grid connection (32A–63A), even for site configurations with multiple tower cranes.
The battery provides the peak power, the grid provides the base.

This completely avoids the need for an expensive high-consumption connection.

3) How much does a Neargrid system cost?
The cost depends on:
the type of battery (Compact, Boost, Force)
the power of your tower cranes
the number of consumers on site
cyclical use (day/night)
possible integration of solar panels or charging stations

The fastest way to calculate an accurate price and ROI is via our Energy Planner.

4) What does the ROI look like in practice? Dozens of projects show:
Payback period: 6–24 months
For heavy tower cranes or long projects: often fully recouped within a single project
Cost savings compared to diesel generators: up to 80%
No lost hours/downtime → biggest profit item
No CAPEX or waiting time for grid reinforcement
No maintenance contracts required
The ROI becomes even stronger as emission requirements increase (CO₂ performance ladder, zero-emission zones).

5) Conclusion
In almost all cases, a Neargrid system is cheaper, more reliable, and more efficient than diesel or a heavy grid connection.
- Lower TCO
- Less maintenance
- No downtime
- No CO₂ or noise
- No waiting times
- No expensive upgrades
- Peaks are effortlessly absorbed

Free simulation for your project
Would you like to know exactly how much your construction site can save with Neargrid?
Our Energy Planner calculates the TCO and ROI based on your consumption data, tower crane profile, and grid connection.
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Contact us for a project calculation
Together, we will make a transparent comparison with diesel and high consumption.
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