-
Can I use the solar
hot water to heat my
home -
This
is a very common
question, and
although the answer
is "Yes, that is
possible" the
economics are not
usually there.
Since most home
heating is only
required during the
5-7 months of the
year with the least
sunshine, this
scenario would
require a large
number of collectors
which are unused
during the summer
months, which
presents some
technical problems
(overheating of
solar collectors can
be a serious
problem). Or the
home owner needs to
incorporate a very
large thermal
storage system such
as multi-thousand
gallon insulated
water tanks or
geo-thermal wells to
store solar energy
collected over the
summer for use in
the winter. Since
equal amounts of hot
water are required
year round, focusing
on domestic hot
water
systems usually make best
use of the
equipment. One
exception is homes
with swimming pools
that can make use of
significant heat
over the summer
months. These homes
may be able to have
excess solar heat to
supplement a home
system in the winter
months.
-
What
solar hot water system
would I need for my home
and what would it cost -
The
system
sizing page
should help with general
sizing considerations,
and our system costs are
provided on the
solar vs. electric
and
solar vs. gas pages.
Typically a 1-3 person
home requires a 1
collector system costing
$2350, and a 3-5 person
home requires a two
panel system costing
$3495 after EnerGuide
grants. For a site
specific recommendation
on what system is right
for you, and an exact
quote on what that
system would cost,
please
contact us and we
will can provide a
detailed site analysis
and/or system quote for
you.
-
What does
a solar pool system cost
- Every pool system is
different, however, as a
rule of thumb the cost
is $7.99 per square foot of
pool area. You should
consider a combined
solar hot water or
supplemental home
heating system in
conjunction with a solar
pool heating system.
Contact us for site
specific options and
quotes.
-
Will hail
damage the solar
collectors
- The glass cover on
solar collectors is high
strength tempered glass
(similar to automotive
windows) which is much
stronger than typical
home window glass. We
are not aware of any
collectors installed in
Saskatchewan having
broken as a result of
hail damage so far,
however anything is
possible. Like a
skylight or other parts
of your house, your home
insurance should cover
any hail or other types
of damage that may occur
to your solar collector.
-
These systems
sound like the right way to
go, but how can I afford it
-
The upfront costs make the
systems sound expensive,
when in fact it is cheaper
for most people to own a
solar hot water system than
to continue to use fossil
fuels to heat their water.
If consumers can add the
cost of a solar water system
to their mortgage, they will
find the monthly energy
savings will be greater than
the increased mortgage
payment, so they will be
coming out ahead. Other
options to make the system
more affordable up-front are
the rental plans provided by
Rock Paper Sun, or Green
Loans obtained through 3rd
party lenders. Our
funding
page has some more details.
-
What
happens in the winter
when snow covers the
collector
- In most cases snow
will melt or slide off
of the glass collector
fairly quickly because
it will be much warmer
than the surrounding
roof. If for some
reason a complete snow
cover stays on the
collector, it will not
produce hot water until
the snow melts or blows
off.
-
Can we
use the sun power for
things other than
heating -
The
EnerWorks collectors
that Rock Paper Sun
sells are only used for
heating water, however
you can also install
solar electric
(photovoltaic or PV)
panels which are used to
provide electrical power
for your home. The
payback on these systems
is currently much longer
than that for the solar
thermal systems, however
they are a technology
that Rock Paper Sun is
knowledgeable about, and
are planning on
providing product
offerings soon. Please
contact us if you'd like
to consider one of these
systems, we can discuss
current costs and
grants/programs that are
available.
-
What is
the optimal angle to
mount the solar
collectors at
- From an energy
collection per unit area
perspective there are
optimal mounting
angles. In Saskatoon
this is somewhere
between 40 and 70
degrees, depending on
what time of year you
wish to obtain the most
energy from the system.
However, from a system
cost and practicality
perspective, it is often
optimal to mount
collectors flat on a
sloped roof, and then
install the appropriate
number of collectors to
meet your needs. In
most residential
installs, roof area is
not a limiting factor,
so installing at the
optimal angle for energy
collection is not a
critical issue.
-
Are
evacuated tube
collectors better than
flat plate collectors
- For the most part,
evacuated tube
collectors have better
performance
characteristics in cold
climates, however, the
cost of these systems is
typically less
attractive than the flat
plate collectors. You
can often just install
one or two extra flat
plate collectors for a
lower cost than a equal
output evacuated tube
system. Rock Paper Sun
can provide quotes and
install evacuated tube
systems, just let us
know if that's what you
want to do.
-
Does a
solar hot water system
replace my existing
system
- No, for almost all
residential systems, a
solar water system is
connected in series with
your existing hot water
system. If/when your
existing conventional
system needs replacing,
you can likely replace
it with a smaller
system, however, you
still use the
conventional water
heater to top-up the
heat provided by solar
when solar does not do
the whole job. This can
happen when you have
higher than typical hot
water usage, after
prolonged cloudy
periods, or in the
winter when the solar
day is very short, and
the incoming water
temperature is lower.
-
How much
hot water will the solar
heating system provide
- Most systems we
install are sized to
provide near 100% of
summer hot water needs
and between 50-75% of
your total
yearly needs. You can
see the
Savings vs.
Electric or
Savings vs.
Gas pages for typical
system payback, or talk
with us about your
particular situation to
get an accurate estimate
of what your specific
savings could be.
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