Off-Grid or On-Grid
Which solar energy system should you choose for your house or cottage?
Solar energy is increasingly popular among families and individuals who want to reduce their electricity bills, gain autonomy, or make a concrete step for the environment. But before diving in, a common question arises: should you choose an off-grid system or an on-grid system?
Here is a simple guide to better understand the difference between the two and choose the solution best suited to your lifestyle.
1. Are you connected to the power grid?
Off-Grid
Ideal for a remote cottage, an RV, or any property without access to Hydro-Québec. This system operates completely autonomously thanks to solar panels, storage batteries, and, if needed, a generator. Batteries Expert
On-Grid
Your home remains connected to the power grid, but you use your solar panels to reduce your consumption. Surplus energy produced is fed back into the grid, which can earn you credits on your bill. Batteries Expert
Hybrid (grid-connected with batteries)
Your home stays connected to the grid, but you use solar panels to cut consumption. Surplus energy is either fed to the grid and/or stored in batteries depending on your needs or preferences. Batteries Expert
2. Where is the produced energy stored?
Off-Grid
Your autonomy depends on the storage capacity of the batteries (often lithium), which accumulate the energy. So even during cloudy weather or at night, you still have electricity — you have a reserve. Batteries Expert
On-Grid
No need for batteries: the grid serves as a “virtual battery.” Excess energy goes to the grid, and you draw from the grid when your panels produce less.
Hybrid
You get the best of both worlds… Excess energy produced is stored for later use (for example during outages or peak periods). When batteries are full, surplus can be injected into the grid for credits. Batteries Expert
3. What about costs?
Off-Grid
Installation requires a higher budget because of the batteries and a more complete system to ensure autonomy. But in return, you gain total independence.
On-Grid
Less expensive initially, since there is no need to purchase batteries. However, connection fees to the grid may apply.
Hybrid
Potentially more expensive because of batteries and control systems, depending on needs. More flexible, since you’re not entirely dependent on solar panels to power your home.
4. What about reliability during an outage?
Off-Grid
Your autonomy depends on good management of batteries and equipment. When well designed and maintained, the system protects you from widespread blackouts.
On-Grid
As long as the grid is stable, you have continuous electricity. However, in case of a blackout, you’re also affected — unless you opt for a hybrid solution with batteries.
Hybrid
Best of both worlds … Stored energy ensures autonomy for selected critical loads.
5. What’s the ecological impact?
Off-Grid
Every kilowatt produced is precious! These systems encourage more responsible consumption and greatly reduce the carbon footprint associated with using a generator.
On-Grid
Your impact depends on the electricity mix of the grid. If the grid is mainly powered by fossil fuels, your system will help reduce your carbon footprint. If the grid is powered by renewables, the impact becomes negligible.
Hybrid
Storing energy for use during outages can reduce carbon emissions that would come from using a generator.
Which to choose?
Off-Grid
You have a remote cottage or a property without utility service
On-Grid
You live in a city or suburb and want to lower your electricity bills.
Hybrid
You’re connected to the grid and seek full or partial independence and are willing to invest more.
Our bright advice
Every solar project is unique. Whether you choose an autonomous system or a grid-connected one, what matters is to assess your real needs and your budget.
Batteries Expert’s solar energy experts are there to help you choose the most sustainable and efficient solution.
Evaluate Your Solar Project