Solar Power can be price competitive

Turnkey solar power systems are now available to Ontario homeowners at prices which, amortized over 25 or 30 years, can deliver electricity as cheaply as your local Hydro company!

There are of course provisos, principal of which is the efficiency of the site. When generous government incentives were available, solar was installed on many sub-optimal sites, facing east and west, even north.

To be as cheap as local distribution company, your solar roof needs to be south facing with a slope of 20-40 degrees so the annual production is the maximum (about 1200 kWh per kW per year).

To be cost effective, my preferred installer has focused on standardizing systems and reducing costs to the homeowner ever since the Ontario Government in 2018 removed all incentives for renewable technologies in the province.

Through me, you can sign an installation agreement directly with the installer who is an electrical contractor and will be responsible for the entire job.

A site assessment is mandatory: there first is a remote assessment, then after receiving a refundable deposit, the installer will visit the site in person to assess roof condition and electrical service panel in addition to the factors mentioned below.

The ideal roof for solar faces near south, has a slope of 20-40 degrees, and is unobstructed, not shaded, and large enough for at least 20 solar panels.

Asphalt shingles are the most common type of roofing and should be almost new to avoid the later expense of removing the solar panels in order to re-shingle.

To be cost effective, need to allow my installer to choose the equipment. Much work has gone into selecting components that are available in Ontario at negotiated prices. Insisting on the latest and greatest product you saw on the internet will in most cases add to the cost of the system. If you have strong preferences I suggest first getting the standard quote then upgrades can be considered.

There are 3 principal components to a rooftop solar power system: the inverter, the solar panels (also called modules) and the racking (also called mounting system).

At the present time, my preferred installer is using SMA inverters. Canadian Solar panels and Kinetic Solar racking. All tier 1 equipment.

My next post will provide examples with actual costs and return on investment for 5, 7.5 and 10 kW systems.

Battery Back Up

You should look at other options for back up power

In a previous post I promised to write about Battery Back Up.  I will do so now. In future monthly postings, I will choose topics and do some research to bring in interesting ideas. In these initial posting  I am using my mental database as my only resource as I am trying to “prime” the blog.

Other Options

You should look at other ways to obtain emergency power. Many homeowners choose gas generators  as the right size gas generator can run the entire house. Running your whole house as usual on batteries is an enormous task because batteries drain quickly when large loads are connected to them. When we design a system, we must ask numerous questions of the homeowner.  We must find out what are the essential loads to be backed up. Our electrician must install a pony panel and to run the necessary wires so that when the grid goes down, power from the storage battery flows only to the selected loads.

Select Loads to be backed up

Typically, homeowners choose furnace motor, fridge, some lights, an outlet for plugging in a computer and any essential medical appliances.

How Many Hours must battery last?

Decide how many hours the selected loads must be powered. With that information and loads, we can estimate how many kWh of storage to provide.

Sun  shining on the panels will add to autonomy once the batteries are charged but in our climate most outages occur during the winter when sun hours are few or panels covered with snow and ice.

None of this is cheap – adding a pony panel and batteries can double the cost of a net metered system.