How to Install an Inbuilt Lithium Battery Inverter: Step-by-Step Guide

25 September 2026

Installing an inbuilt lithium battery inverter requires the right model, suitable placement, correct electrical connections, and proper testing. Unlike a conventional inverter and external battery setup, an inbuilt lithium inverter combines the inverter and lithium battery in one unit, which can simplify installation and reduce the number of separate components.

This guide explains the important steps involved in inbuilt lithium battery inverter installation, including model selection, placement, mains connection, load connection, solar connection for hybrid models, testing, and safety checks.

Important: Electrical and solar connections should be carried out by a qualified electrician or authorized technician. Do not open the inverter or attempt internal wiring yourself. Always follow the specific wiring diagram and installation instructions supplied with your model.

Before Installing an Inbuilt Lithium Battery Inverter

Before starting the installation, check these points:

Confirm the inverter's VA rating is suitable for your connected load.
Check the battery voltage of the model.
For solar models, check the permitted PV voltage, current, and solar power.
Keep the installation area dry and well ventilated.
Make sure mains power is switched off before electrical connections are made.
Use the recommended cable size, protection devices, and earthing arrangement specified in the product manual.
Keep the inverter away from water, excessive heat and flammable materials.
Keep the user manual available during installation.

The exact connection procedure can vary between models, so the product manual should always take priority over a general installation guide.

Step 1: Select the Right Lento Inbuilt Lithium Battery Inverter

The first step is choosing an inverter that matches your load and backup requirements.

Lento's inbuilt lithium inverter range includes models around 1.1kVA, 2.1kVA and 2.5kVA, with different configurations for home backup and solar applications.

Inbuilt Lithium Battery Inverter

Model	Battery	Rated Capacity	Typical Use
1.1kVA	12.8V, 100Ah lithium	1100VA	Home backup
2.1kVA	25.6V, 100Ah lithium	2100VA	Larger home loads
2.5kVA	25.6V, 100Ah lithium	2500VA	Higher household loads

For the latest specifications, check the relevant Lento inbuilt lithium battery inverter product page before installation.

Solar Inbuilt Lithium Battery Inverters

Lento also offers solar configurations using PWM and MPPT solar charging technology.

For example, the current range includes:

1.1kVA / 12.8V
2.1kVA / 25.6V
2.5kVA / 25.6V

For solar models, do not connect panels until you have checked the inverter's PV input limits.

See the Lento Solar Inverter with Inbuilt Lithium Battery MPPT range for model-specific specifications.

Step 2: Choose the Correct Installation Location

Location is important for both performance and safety.

Install the inverter in a:

Cool and dry area
Well-ventilated location
Dust-free environment
Place protected from direct sunlight
Location away from water and moisture
Position with sufficient space around the inverter for airflow
Stable wall or surface capable of supporting the unit

Do not install the inverter inside a completely enclosed cabinet unless the installation design specifically provides adequate ventilation.

For wall-mounted models, use the mounting arrangement specified by the manufacturer. For floor or wheeled models, place the unit on a stable, level surface.

Step 3: Switch Off the Electrical Supply

Before making any electrical connection:

Switch off the mains supply.
Isolate the relevant circuit.
Confirm that the electrical connection is de-energized.
Follow the safety procedure specified by your electrician and the product manual.

Do not connect or disconnect wiring while the system is energized.

For commercial or higher-capacity installations, professional installation is strongly recommended.

Step 4: Connect the AC Input

The AC input connects the inverter to the mains supply.

The electrician should connect the input according to the wiring diagram supplied with the specific Lento model.

During this step, check:

Input voltage compatibility
Correct polarity
Correct cable size
Proper protection devices
Proper earthing
Tight and secure terminals

Do not guess terminal connections based on another inverter model. Always use the wiring diagram for the exact model being installed.

Step 5: Connect the Backup Load

The next step is connecting the appliances or circuits that will receive backup power.

Depending on the inverter capacity, the backup load may include appliances such as:

LED lights
Fans
Television
Wi-Fi router
Computer
Refrigerator
Other compatible household loads

The total connected load should remain within the inverter's rated output.

For larger systems, the electrician can create a dedicated backup circuit rather than connecting the entire building load.

Do not overload the inverter

An inverter's VA rating does not mean every appliance can be connected without checking its actual power requirement.

High-starting-current appliances such as motors, pumps, refrigerators and other inductive loads require additional consideration.

Step 6: Connect Solar Panels for Solar Models

If you are installing a Lento solar hybrid inverter, the solar panels are connected to the dedicated PV input.

Before connecting the panels, check:

Maximum PV voltage
Maximum PV current
Recommended solar power
Panel configuration
Polarity
PV cable requirements

PWM vs MPPT

Both PWM and MPPT solar charge controllers are used in solar inverter systems, but their operating characteristics are different.

PWM:
Generally used in simpler solar configurations where the panel and battery voltage arrangement is designed to work together.

MPPT:
Allows the solar charging system to operate across a wider input range and can improve solar energy harvesting under suitable operating conditions.

Do not assume that a panel configuration suitable for a PWM model will also be suitable for an MPPT model. Always check the specifications of the exact inverter.

Step 7: Check All Connections Before Powering On

Before switching the system on, the installer should check:

AC input connections
Backup output connections
Solar connections, if applicable
Earthing
Cable tightness
Polarity
Protection devices
PV voltage
Connected load
Ventilation around the inverter

This final inspection can help identify wiring errors before the inverter is energized.

Step 8: Power On and Test the Inverter

Once the installation has been checked, the electrician can energize the system according to the manufacturer's startup procedure.

Check the inverter display for information such as:

Input supply
Output supply
Battery status
Charging status
Solar input, where applicable
Warning or fault indicators

Start with a small compatible load and confirm that the output is stable before connecting the complete backup circuit.

Step 9: Check the Lithium Battery Charging

For an inbuilt lithium battery inverter, the battery is already integrated into the unit.

After startup, check that the battery is charging correctly from the available charging source.

Depending on the model and operating conditions, charging time can vary. Do not use a fixed charging-time assumption for every inverter.

The inverter's display or monitoring system should be used to check charging status.

Common Installation Mistakes to Avoid

Avoid these common mistakes when installing an inbuilt lithium battery inverter:

1. Installing the inverter in a closed space

Poor ventilation can cause unnecessary heat buildup.

2. Connecting incompatible solar panels

The PV voltage and current must remain within the inverter's specified limits.

3. Using undersized cables

Incorrect cable sizing can result in voltage drop and excessive heating.

4. Connecting too much load

The connected load should remain within the inverter's rated capacity and should also account for appliance starting currents.

5. Ignoring earthing

Proper earthing is an important part of a safe electrical installation.

6. Guessing the wiring

Different inverter models can have different terminal arrangements. Always use the exact product manual.

7. Installing near water or excessive heat

Moisture and excessive temperature can negatively affect electrical equipment.

8. Attempting internal battery repairs

An inbuilt lithium battery system contains electrical and battery-management components that should only be serviced by qualified personnel.

Can You Install an Inbuilt Lithium Battery Inverter Yourself?

The physical placement of an inverter may appear simple, but the AC, backup and solar electrical connections should be handled by a qualified electrician or authorized technician.

This is particularly important for:

Hybrid solar inverters
Higher-capacity inverters
Commercial installations
New electrical circuits
Solar PV installations
Installations requiring changes to the distribution board

A professional installation also helps ensure that the correct protection, cable sizing and earthing arrangements are used.

Where Should an Inbuilt Lithium Inverter Be Installed?

The ideal location should be:

Dry
Cool
Well ventilated
Easily accessible for monitoring
Away from direct sunlight
Away from water
Away from flammable materials
Suitable for the weight and mounting requirements of the inverter

Avoid placing the inverter where it can be exposed to rain, flooding or continuous high temperatures.

What Is Different About Installing an Inbuilt Lithium Inverter?

The main difference is that the lithium battery is integrated into the inverter system.

With a conventional setup, the installer generally has to deal with:

Inverter + external battery + battery cables + battery connections

With an inbuilt lithium system, the battery is integrated into the product, reducing the number of external battery connections.

However, AC wiring, load connections and solar PV connections still need to be installed correctly.

Installation Checklist

Before handing over the system, check the following:

Check	Status
Correct inverter model selected	✓
Installation location suitable	✓
Mains input connected correctly	✓
Backup load connected correctly	✓
Earthing checked	✓
Solar PV checked, if applicable	✓
PV voltage within specification	✓
Cable connections tightened	✓
Inverter powered on correctly	✓
Battery charging checked	✓
Backup load tested	✓
No warning or fault indication	✓

Frequently Asked Questions

How do you install an inbuilt lithium battery inverter?

Installation generally involves selecting the correct model, choosing a suitable location, connecting the AC input and backup load, connecting solar panels for solar models, checking earthing and protection, and testing the system. Electrical connections should be completed by a qualified professional.

Can I install a lithium battery inverter myself?

The physical placement may be straightforward, but AC and solar wiring should be handled by a qualified electrician or authorized technician. Follow the installation manual supplied with the specific inverter.

Where should a lithium battery inverter be installed?

Install it in a cool, dry and well-ventilated location away from direct sunlight, water, excessive dust and flammable materials.

Can an inbuilt lithium inverter be connected to solar panels?

Yes, solar-enabled models can be connected to solar panels, provided the panel configuration stays within the inverter's specified PV voltage, current and power limits.

What is the difference between PWM and MPPT solar inverter installation?

The basic installation process is similar, but the solar panel configuration and allowable PV input parameters can differ. Always check the specifications of the particular PWM or MPPT inverter before connecting panels.

What should I check before switching on the inverter?

Check the AC input, backup output, earthing, cable connections, polarity, protection devices and, for solar models, the PV voltage and polarity. The installer should also verify that the connected load is suitable.

How long does it take to install an inbuilt lithium battery inverter?

Installation time depends on the inverter model, wiring condition, backup circuit, solar connection and site requirements. A simple replacement can take less time than a new solar or commercial installation.

Buy a Lento Inbuilt Lithium Battery Inverter

Lento offers inbuilt lithium battery inverter options for home and other applications, including different capacity and solar configurations.

For single-unit purchases, you can also check the Lento Amazon Store to compare available models, pricing and customer reviews.

For product specifications, see the Lento inbuilt lithium inverter range.

Final Thoughts

Installing an inbuilt lithium battery inverter is not simply about connecting an inverter and switching it on. The right model, installation location, electrical protection, cable sizing, load capacity and solar specifications all matter.

For a Lento inbuilt lithium battery inverter, follow the installation manual for the exact model and use a qualified electrician or authorized technician for electrical and solar connections. Proper installation helps the system operate safely and makes it easier to monitor and maintain over time.

Contact Lento

Email: info@lentoindia.com
Domestic: +91 9311811396
International: +91 9810173869
Toll Free: 18003130746