Notice the set above, all of them have concrete or tar to
add weight to fool the purchaser into paying a high price
for a inferior product that does not even come close to its
rated value. On the right is a claimed 35 farad unit that as
you can see is made up of two separate capacitors and
together they measured less than 2 farads.
This unit to
the left is one from the 35 farad model shown above.
Note its mostly tar. It failed in a few days of
testing by charging it up and measuring its true capacitance
via a discharge cycle into a known load value. The
method used to measure the true capacitance of any capacitor
this large is to use the R/C Time method which renders
reasonable accuracy. All the capacitors we
measured were so low as to not even come close to their
rated values. An example measurement indicated 2 farad
from a similar 30 farad unit like this one.
This unit was rated 24 volts
and advertised at 5 farad. It failed and shorted out
at a charging voltage of 16 volts on our slot model.
It was not in use, just connected and after a 14 hour period
it was discovered to have blown and burned on the inside
leaving an acrid smell in our garage where it was tested.
Good thing it was surrounded by concrete to prevent a
fire....
This unit did not fail, it
was simply no where near its rated value of 2 farad.
It is constructed of 10 capacitors in parallel each rated at
10,000 uF or micro-farad. 10,000 uF is the equivalent
of .01 farad so 10 of them would render .1 farad.
10 x .01 = .1
At least this one used real production
capacitors rated at 16 working volts. All we can say
is that this model used better parts that most of its
competitors.
