How to Choose a Solar Power System
Understanding Your Solar Power Needs
To find the right solution for your family, it’s important to assess your need and energy usage habits.
If you still have questions after reading the information below, please get in touch and we’ll be happy to walk you through the decision-making process.
Grid Tied Solar Power Systems
A grid tied solar power system is connected directly to your home’s electrical panel and then to the electrical utility grid. Grid-tied systems allows the homeowner to utilize power from either their home’s solar energy system or the utility grid. When there is a power grid blackout the solar produce power must also cease.
The advantage of a grid tied system is the ability to balance roof top power production and home power requirements constantly. When a grid-tied system is producing more power than the home is consuming, the excess energy is transferred to the power company (POCOS), thus lowering your utility bill. When the system is not producing sufficient power, the home will begin to draw power from the power grid.
Grid tied systems are the lowest cost type of residential solar electric system since they have fewer required components. However, grid-tied systems will not power your home in the event of a power grid blackout, as they shutdown for safety reasons.
- Least cost
- Easiest design
- Minimal components
- Virtually zero maintenance costs
- Shutdown during a power outage
- Lowest return on investment
- Does not produce power during the daily peak demand
- Highest overall carbon emission option
- Monthly power bill from the POCOS
Grid Tied Solar Power System with Battery Backup (Hybrid)
A hybrid grid- tied solar power system is connected to the power grid, but also adds battery backup to your system. The addition of a battery backup enables the system to balance production and demand, and protects against power outages.
Solar electric system production depends on the available sunlight. Often sunlight is abundant, production can exceed demand. Whenever this happens, excess power charges your batteries. Sometimes the system is producing less electricity than demanded by the home, the batteries can make up the shortfall.
Grid-tied systems being connected to the utility power grid. Allowing the homeowners to draw from the grid during periods of excess demand and to sell power to the grid when there is excess production.
A hybrid system allows homeowners on time of day metering to utilize their own power during high demands, thus saving on peak charges. A hybrid system can also be integrated with a standby generator.
While hybrid grid-tied systems offer more flexibility, they are not without their disadvantages. Charging and discharging batteries reduces the overall efficiency of the system, meaning these systems are more complex and more expensive.
- Can be used during a power grid outage
- Can control your peak usage
- Will allow excess energy to be sent into the power grid
- Higher initial cost
- Requires a battery bank
- Requires maintenance
- Medium carbon emission option
- Monthly power bill from the Power Companies. (POCOS)
Off Grid Solar Power
An off grid residential system is completely disconnected from the electric power grid and is an island upon itself. Without a connection to the power grid, batteries are essential to balance periods of excess production and excess demand. Backup generators are also common to offset the demand on the batteries during periods of low sunlight conditions.
Living with an off grid solar system allows greater flexibility. Adjusting your schedule allowing peak usage hours when daily sun is producing maximum energy.
The heat given off a running generator can be salvaged and used for building heat, or domestic hot water. There are many options and usage for saving energy.
- Requires less solar panels than the other options
- No monthly charges, or time-of-day usage fees
- Greenest of all the options; low carbon emissions
- No monthly POCOS billing
- A larger battery bank often required
- Has more expendable components
- Requires monthly maintenance
- Additional personal labour required
Solar power is Right for You
If you are still unsure which system is right for you, contact us today to discuss your requirements with one of our qualified professional.
We can guide you through the process of choosing the solution that best meets your needs, home type, location in Canada, and budget.