Off Grid Solar Rooftop / Ground-Mount Solutions

An “off-grid solar power system” is a standalone electricity system that generates and stores power without being connected to the public utility grid. It is designed to work like a UPS system supporting running of most of the electrical load of the house or building such as lights, fan, kitchen utilities, AC and sometimes lift also depending upon the capacity of the system.

Main components of an off-grid system

Solar panels –converts electricity into direct current (DC) electricity the same is supplied to the building load as well as to charge storage units such as batteries
Battery bank – stores energy for use when the sun isn’t shining (night-time, cloudy days).
Charge controller – regulates the voltage/current from the solar panels to protect the batteries.
Off-Grid Inverter – converts DC power (from panels/batteries) into alternating current (AC), which is what most household appliances use. In the recent models of Off-Grid Inverters, the charge controller is built-in to the inverter.

The major role is to convert DC power into AC power with highest efficiency. Modern day inverters are intelligent and ensure the solar modules are operated at the maximum power point (MPPT).

The Off Grid Inverter consists of in-built MPPT charge controller and bi-directional inverter to supply continuous power to the dedicated load with support to the load coming in this order:

These inverters have the capabilities to :

Take Solar Power and route it to the Batteries for storage
Allow auxiliary power from BESCOM to charge the batteries
Take Battery as input and deliver AC power to the utilities
The sine wave inverter generates a sinusoidal AC voltage with an exceptionally precise voltage and stabilized frequency. The inverter is protected against overload and short circuit

Off-Grid Solar Power systems are very convenient in remote areas such as villages / mountainous areas where grid supply is not available or has frequent power-outages.

Battery Bank :

The battery bank is the heart of an off-grid solar system, since it stores the energy for use when the sun isn’t shining.

Two types of Battery options are available :

C10 Battery (Lead-Acid Deep Cycle, C10 Rating)

C10 are the most commonly used batteries for off-grid solar systems

What "C10" means: The capacity is rated over a 10-hour discharge cycle. o Example: A 100Ah C10 battery gives 10 amps for 10 hours.
Type: Usually tubular lead-acid batteries, designed for solar applications.
Cost: Cheaper upfront.
Lifespan: 3–5 years (sometimes 6–7 with careful maintenance).
Efficiency: 70–80% (you lose some energy during charging/discharging).
Depth of Discharge (DoD): Recommended ~50% (using more reduces life).
Maintenance: Requires periodic water topping (if flooded type).
Best for: Small/medium off-grid homes on a budget, with regular sunlight and willingness to maintain.

LiFePO₄ Battery (Lithium Iron Phosphate)

LiFePO4 – Lithium Fero Phosphite Battery

LiFePO4 – Lithium Fero Phosphite Battery bank

Modern lithium battery chemistry — very safe, stable, and ideal for solar.
Cost: Higher upfront (2–3× lead-acid).
Lifespan: 10–15+ years, 3000–6000 cycles
Efficiency: 90–95% (much less energy loss).
Depth of Discharge (DoD): 80–90% safely (can use most of its capacity daily).
Maintenance: Zero (fully sealed, smart BMS built-in).
Best for: Long-term off-grid systems, where reliability and performance matter more than initial cost.

Solcore Offerings

Solcore offers Off-Grid systems suitable for small-to-medium homes or industrial/commercial customers. Most of the small-medium houses deploy 3-5 KW off-grid systems. Larger systems (10 KW to 100 KW systems with 3-phase Output) can be designed and offered to specific needs.

Solcore has designed and implemented several off-grid systems for its customers in Bangalore:
5 KWp off grid system (HSR Layout)
5 KWp off grid system (Soolagiri, TN)
3 KWp off grid system (Polytechnic school, Bangalore)
3 KWp off grid system (Jayanagar, Bangalore)