On- Grid/ Off- Grid Solar Solution

On Grid Solar Solution

Stand alone solar power solutions, in other word off- grid systems, are for those who are not able or willing to be connected to the electricity grid. Here you find energy solutions for small households to large office buildings. The system incorporates highly sophisticated inverter/charger technology, one or multiple solar inverters with maximum power point tracking (MPPT), and deep cycle batteries.

On the other hand, the Grid-tied Solar Electric Systems (also known as on- grid system) generate electricity for your home or business and route the excess power into the electric utility grid for compensation from the utility company. However, unlike off-grid systems, a grid-connected system rarely includes an integrated battery solution, as they are still very expensive.

Cosine Power BD stocks all the required components of good quality and we design & assemble complete solar packages of ANY size system for both on- grid and off- grid applications.

Off Grid Solar Solution

We put our best efforts to make the proposal customized for you so that it ensures your maximum output without compromising the quality. The whole installation will take place under the direct supervision of our qualified engineers as we do believe that a quality installation is a much needed factor to the overall success of a project. Having given a chance to serve your esteemed project, we shall leave no stone unturned to see our alliance flourishes and yields the desired results.

Below you see some complete systems of varying sizes. We are confident that any of these systems will perform reliably and problem-free.  For custom design or to talk with a solar designer about what is right for you, mail us at info@cosinepowerbd.com


List of some Standalone & Grid- Tie Solar System Solution:

Sl Product no. System Size Items Included Output
PV Module Battery Inverter Charge Controller Others Depth of Battery Discharge Back up Time without Sunlight Daily Output
1 COS1KS 1000W


100W: 10pcs 80AH(12V): 6pcs Off-Grid 1KVA(24V): 1pcs 32A: 1pcs Mild Steel Frame, DC/ AC Cable, Circuit Breaker, Battery Cabinet & other accessories 50% 02 2595Wh
2 COS2.5KS 2500W


120W: 20pcs;

30W: 4pcs

70AH(12V): 8pcs Off-Grid 2.5KVA(36V): 1pcs 40A: 1pcs 50% 02 6626Wh
3 COS5KS 5000W


250W: 18pcs;

85W: 6pcs

70AH(12V): 12pcs Off-Grid 2.5KVA(36V): 2pcs 60A: 1pcs 50% 02 15166Wh
4 COS7KG 7000W


250W: 28pcs Grid-Tie 3.6KW: 2pcs 21232Wh
5 COS10KG 10000W


250W: 40pcs Grid-Tie 5KW: 2pcs 30332Wh

**We also provide other customized systems unique to your specific application. All product packages include the design, transport delivery & installation service.


  • PV Module: 20 years.
  • Inverter: 3 years.
  • Charge Controller: 03 years.
  • Battery: 05 years.
  • Installation: 02 years.