What problem the system is solving

Cutting the energy bill, protecting production during outages, and electrifying a site with no grid are three different objectives that lead to three different configurations.

Grid reliability at your site

A site with a stable connection gets the most from a grid-tied system. A site with frequent interruptions may justify storage on production-critical loads only.

Net metering eligibility

Grid export requires BPDB or DESCO approval, a bidirectional meter and SREDA compliance. This is a paperwork path with its own timeline, and it should start alongside the engineering.

Roof structure and area

The mounting structure has to be designed by a civil engineer against the actual roof. Available area and structural capacity set the practical ceiling on capacity, before any commercial discussion.

Load profile through the day

A factory consuming during daylight matches solar generation well. A load that peaks after dark changes the economics and pushes towards storage.

Storage is the expensive part. Many industrial sites start grid-tied and add storage to critical loads later, which is a legitimate plan rather than a compromise.

Choosing a rooftop solar configuration.

For a Bangladeshi factory the choice between on-grid, hybrid and off-grid is not a question of which technology is better. It follows directly from what the site is trying to achieve: the lowest cost per unit of energy, continuity of production through an outage, or power where there is no grid at all. Each configuration is the correct answer to one of those, and the wrong answer to the others.

What actually drives the decision

What problem the system is solving: Cutting the energy bill, protecting production during outages, and electrifying a site with no grid are three different objectives that lead to three different configurations.
Grid reliability at your site: A site with a stable connection gets the most from a grid-tied system. A site with frequent interruptions may justify storage on production-critical loads only.
Net metering eligibility: Grid export requires BPDB or DESCO approval, a bidirectional meter and SREDA compliance. This is a paperwork path with its own timeline, and it should start alongside the engineering.
Roof structure and area: The mounting structure has to be designed by a civil engineer against the actual roof. Available area and structural capacity set the practical ceiling on capacity, before any commercial discussion.
Load profile through the day: A factory consuming during daylight matches solar generation well. A load that peaks after dark changes the economics and pushes towards storage.
Budget and phasing: Storage is the expensive part. Many industrial sites start grid-tied and add storage to critical loads later, which is a legitimate plan rather than a compromise.

What each option is built for

On-grid (grid-tied) with net metering (Vvon Solar EPC)

Best suited to: The lowest cost per unit of solar energy on a site with a reliable grid connection.

Typically runs in: Factories, commercial buildings and institutions with a stable connection and daytime consumption.

No battery cost, so the best economics per kilowatt installed
Surplus generation exported under BPDB or DESCO net metering
We handle the net-metering application, approval and bidirectional meter installation
SREDA compliance managed as part of the project
Simplest system to maintain over its life

What the site needs: A stable grid connection, roof area and structure to suit, and the net-metering approval path.

Hybrid (grid-tied with storage) (Vvon Solar EPC)

Best suited to: Keeping production running through grid interruptions while still cutting the energy bill.

Typically runs in: Manufacturing sites where an outage stops a line, and facilities with loads that cannot be interrupted.

Continuity of supply to selected loads during grid outages
Still reduces the energy bill in normal operation
Storage can be sized to critical loads rather than the whole site
Can be phased — grid-tied first, storage added later

What the site needs: Space and ventilation for storage, a defined list of critical loads, and the grid connection.

Off-grid (Vvon Solar EPC)

Best suited to: Sites with no grid connection, or where extending the grid is not practical.

Typically runs in: Remote installations, field facilities and sites where a connection is unavailable.

Complete independence from the grid
Designed around the site's actual load profile and autonomy requirement
Removes fuel logistics where the alternative is a diesel generator

What the site needs: Storage sized for the required days of autonomy, and a load profile agreed before design.

Solar irrigation pump (Vvon Solar EPC)

Best suited to: Agricultural pumping where daytime water demand matches solar generation.

Typically runs in: Farms and agricultural schemes currently pumping on diesel or an unreliable connection.

Pumping demand naturally coincides with solar generation
Removes recurring diesel cost and fuel transport
Sized against the water requirement rather than an electrical load

What the site needs: Water source details, head and daily volume requirement, and land for the array.

Full specification for Solar irrigation pump

True of every option above

Civil-engineer-led mounting structure design and fabrication for the actual roof or ground conditions
Full BPDB/DESCO net-metering application and approval handled by us where applicable
SREDA compliance managed as part of the project
Design, supply, installation and commissioning by Vvon engineers
Operations and maintenance support after commissioning
Generation monitoring so savings can be verified against the proposal

Send us twelve months of electricity bills and the roof dimensions, and we will model the three configurations against your actual consumption. In most industrial cases the numbers make the choice obvious, and where they do not, we will say which trade-off you are actually deciding between.