Types of Solar Inverters: On-Grid, Off-Grid, Hybrid & Micro Explained

The Short Answer

There are four main types of solar inverters used in India: on-grid (grid-tie), off-grid, hybrid, and micro inverters. On-grid inverters are the most affordable and popular for homes with reliable grid supply. Off-grid inverters work with batteries for areas without grid. Hybrid inverters combine grid-tie with battery backup. Micro inverters optimise each panel individually. Your choice depends on grid reliability, backup needs, and budget.

On-Grid (Grid-Tie) Inverters

On-grid inverters connect your solar system to the electricity grid and enable net metering. They are the simplest, most affordable, and most widely installed inverter type in India.

How they work: Panels generate DC power → inverter converts to AC → your home uses solar power first → surplus feeds into the grid → DISCOM credits your account via net metering.

Key features:

No batteries needed — the grid acts as your virtual storage
Anti-islanding protection — shuts down during grid outages for safety
Qualifies for PM Surya Ghar subsidy
Highest efficiency (96–98%) among all inverter types
Lowest cost: ₹18,000–₹35,000 for 3kW

Limitation: Does not provide power during grid outages. If backup is critical, consider hybrid.

→ Complete on-grid inverter guide

Off-Grid Inverters

Off-grid inverters operate independently of the electricity grid. They work with battery banks to store solar energy for use when panels are not generating — at night, on cloudy days, and during any time of day.

How they work: Panels generate DC → inverter charges batteries and converts DC to AC → batteries supply power when panels cannot.

Key features:

Complete energy independence — no grid dependency
Built-in charge controller for battery management
Essential for remote locations without grid access
Cost: ₹25,000–₹45,000 for 3kW (plus battery cost of ₹40,000–₹1,50,000)

Limitations: Higher total cost due to batteries. No net metering benefit. Batteries need replacement every 5–8 years (lead-acid) or 10–15 years (lithium).

→ Complete off-grid inverter guide

Hybrid Inverters

Hybrid inverters combine on-grid and off-grid functionality in a single unit. They connect to the grid for net metering while also managing a battery bank for backup during power cuts.

How they work: Panels generate DC → inverter prioritises: (1) power your home, (2) charge battery, (3) export surplus to grid. During outage → inverter switches to battery seamlessly.

Key features:

Net metering + battery backup in one device
Automatic switchover during power cuts (10–20ms, imperceptible)
Can be installed without battery initially and upgraded later
Cost: ₹40,000–₹70,000 for 3kW (plus battery)

Best for: Indian cities with frequent load-shedding where you want both bill savings and uninterrupted power.

→ Complete hybrid inverter guide

Micro Inverters

Unlike string inverters (on-grid, off-grid, hybrid) that connect multiple panels to one central inverter, micro inverters are small units attached to each individual panel. Each panel operates independently with its own DC-to-AC conversion.

How they work: Each panel has its own micro inverter → AC output from all panels combines at the distribution board → feeds home and grid.

Key features:

Panel-level optimisation — shading on one panel does not affect others
5–25% higher energy harvest on shaded or complex roofs
Longer warranty: 25 years (vs 5–10 for string inverters)
Easier system expansion — add panels one at a time
Cost: ₹8,000–₹12,000 per panel (₹48,000–₹72,000 for a 6-panel/3kW system)

Best for: Roofs with partial shading, multiple orientations (east + west), or where maximum energy harvest justifies the premium.

→ Complete micro inverter guide

String Inverters vs Micro Inverters

This is the most common comparison buyers face. Here is a side-by-side:

Feature	String Inverter	Micro Inverter
Architecture	1 inverter for all panels	1 inverter per panel
Cost (3kW)	₹18,000–₹35,000	₹48,000–₹72,000
Shading impact	One shaded panel affects entire string	Only the shaded panel is affected
Efficiency (no shade)	96–98%	95–97%
Monitoring	System-level	Panel-level
Warranty	5–10 years	25 years
Maintenance	Central unit — easy access	Roof-mounted — harder access

Rule of thumb: If your roof is shade-free and panels face one direction, a string inverter is the better value. If you have shading, multiple roof angles, or want maximum long-term yield, micro inverters justify the premium.

How to Choose the Right Inverter Type

Use this decision framework:

Do you have reliable grid supply? → Yes: On-grid or hybrid. No: Off-grid.
Do you need power during outages? → Yes: Hybrid. No: On-grid.
Is your roof partially shaded? → Yes: Consider micro inverters. No: String inverter is fine.
What is your budget? → Tight: On-grid string. Moderate: Hybrid. Premium: Micro inverters.
Do you want government subsidy? → On-grid and micro inverter systems qualify for PM Surya Ghar subsidy. Off-grid does not.

Most Indian homeowners in urban areas with reliable grid: on-grid string inverter. Urban areas with frequent power cuts: hybrid. Complex or shaded roofs: micro inverters.

→ Use our solar calculator to estimate your needs

Compare Inverter Options for Your Home

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Common questions

What is the difference between on-grid and off-grid solar inverters?

On-grid inverters connect to the electricity grid and enable net metering — surplus solar power earns credits on your bill. They do not work during power cuts. Off-grid inverters work independently with battery storage, providing power even without grid. On-grid is cheaper and suits urban homes; off-grid suits remote areas without reliable grid.

Can I convert an on-grid inverter to hybrid later?

No. On-grid and hybrid inverters are fundamentally different hardware — you cannot retrofit an on-grid inverter with battery support. However, some hybrid inverters can be installed without batteries initially and have batteries added later. If you think you may want backup in the future, invest in a hybrid inverter upfront.

Which solar inverter type is most efficient?

On-grid string inverters are the most efficient at 96–98% conversion efficiency because they have the simplest architecture with no battery management overhead. Hybrid inverters achieve 94–97%. Micro inverters achieve 95–97% per panel but can deliver higher total system yield on shaded roofs due to panel-level optimisation.

Do I need a hybrid inverter if my area has power cuts?

If power cuts are rare (a few hours per month), an on-grid inverter with a basic UPS for critical loads may suffice. If power cuts are frequent or prolonged, a hybrid inverter with battery backup is the better investment — it provides seamless switchover and continues powering your home using stored solar energy.

Are micro inverters available in India?

Yes. Enphase is the dominant micro inverter brand in India and has a growing installer network. APsystems is another option. Micro inverters are available through most verified solar installers but may have longer lead times than string inverters. Prices run ₹8,000–₹12,000 per panel unit.

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