How much does a solar electric system cost?

Grid-tied net metering systems with 20–24 solar panels, without battery backup, typically range from $20,000 to $30,000.

Adding battery backup to a net metering system can increase the cost by $15,000–$20,000.

Costs depend on several factors, including your roof structure and current electrical system. For example, steep or multi-story roofs are more challenging and expensive to install on than bungalows or shallow-pitched roofs. Metal roofs require specialized brackets, further impacting the cost. A detailed assessment of your home will help determine the best options.

Why do quality battery backup systems cost so much?

The Canadian Electrical Code mandates strict regulations for installing solar panels and battery backup systems in residential homes. High-quality battery systems meet rigorous fire and electrical safety standards and carry certifications required by the Ontario Electrical Safety Authority (ESA). These systems are thoroughly inspected, and an ESA certificate ensures compliance, which your insurance provider may also require.

DIY products available online, like those from Amazon, often do not meet these strict standards and cannot be safely integrated into residential systems.

How do battery backup systems actually work?

Batteries store and release electricity—they don’t generate it. They are charged either by a solar charge controller connected to solar panels or a battery charger powered by the electrical grid or a generator.

When the grid fails, batteries supply power to essential circuits via a critical loads panel, keeping vital appliances like fridges and lights running. The duration depends on your battery size, the appliances used, and available sunlight to recharge the system.

Can I charge my electric car from a battery backup system during a power failure?

Yes, but it’s inefficient. You’re essentially transferring energy from one battery to another. While it may provide a few additional kilometers of range, it’s not a sustainable long-term solution.

Why are lithium batteries so popular?

Lithium batteries are highly durable and recharge faster than traditional lead-acid batteries. They also offer more charge cycles, making them ideal for frequent use, such as in electric cars or off-grid systems. While they are more expensive upfront, their longer lifespan and faster recharge rates make them a practical choice for many applications.

Can I have a battery backup system without lithium batteries?

Absolutely! Many excellent non-lithium battery options are available and can perform well for emergency backup systems. These are easier to install and still provide reliable power during outages.

What information do I need to provide for a battery backup system quote?

To design your system, we need to know which appliances and circuits you want to power during an outage. Most homeowners prioritize essential items like refrigerators, freezers, furnace fans, lights, and internet routers. High-energy appliances like electric water heaters or air conditioning are not recommended for battery backups due to their significant power demands. A site visit will help us assess your electrical setup and potential battery locations.

Should solar panel warranties influence my decision?

Yes and no. High-quality panels typically come with 20–25 year warranties, but failure rates are incredibly low—less than 1%. By comparison, computers and cell phones have failure rates of over 10%. A good warranty offers peace of mind, but you’re unlikely to need it if you choose reliable manufacturers.

What is the payback period for a solar power system?

The payback period depends on fluctuating electricity costs and your energy consumption. Solar systems lock in your electricity costs at today’s rates, shielding you from future price increases. While grid electricity costs are subject to inflation and demand, the cost of generating your solar power remains constant, providing long-term savings.

What’s the difference between string inverters, micro-inverters, and optimizers?

• String Inverters: Convert DC to AC for a group of solar panels. They’re more cost-effective and easier to maintain.

• Micro-Inverters: Installed on each panel, ensuring shade on one panel doesn’t affect the rest. Ideal for roofs with shading or multiple orientations.

• Optimizers: Similar to micro-inverters but require a central inverter.

The best choice depends on your roof’s layout and shading. String inverters are less expensive for unshaded, uniform roofs, while micro-inverters or optimizers are better for complex setups.

Should I cover my entire roof with solar panels?

Not necessarily. While more panels mean more energy, aesthetics and practicality matter too. Symmetry enhances curb appeal, and leaving access for roof maintenance is advisable. Always consider resale value and roof accessibility when planning your installation.