We offer a wide selection of emergency power sources to keep your electronics
running, including the Power Pot, Pan Charger, Pot Charger
and Fire Power Thermoelectric Generators. Especially cool is The
Epicenter's very own Universal Generator Bracket: now you can build your
own AC and DC generator! Both inexpensive and effective. We
also carry the highly popular solar battery recharger. (Use the sun
to recharge those batteries.) We also offer DC to AC power inverters
(converters) to run AC equipment on battery power!
Called "Hatsuden Nabe" in Japan
these generators look like normal household Pots and Pans, they are far
from normal. They are actually very sophisticated fire powered DC generators,
able to convert heat energy into electrical energy.
At the heart of the Pan \and Pot Chargers is one or more Thermoelectric
Generator Modules (or "TEG"). A TEG is a device that creates a voltage
when there is a different temperature on each side of the device. These
TEG devices are made with materials developed in Japan for recovering waste
heat in industrial applications and are capable of operation at extremely
high temperatures, like found in a wood camp fire.
The TEG module(s) are mounted within a cavity in the bottom of the Pan and Pot Chargers. The Pan Chargers employ one TEG module: The
8 Watt Pot Charger uses 4 modules, and the 12 watt Pot Charger has 6 modules.
The FirePower 40 watt model is a different animal, and we will discuss
One side of the TEG is exposed to heat (from a fire for example),
and the other side which is thermally connected to the interior of the
Pan or Pot is cooled by water which is placed inside the vessel.
When heated with a wood-fueled fire, the bottom of the pan will be exposed
to temperatures in the range of 450 to 550 degrees Celsius (842 to 1022
degrees Fahrenheit). In a few minutes the water inside the pan boils and
maintains a constant temperature of 100 degrees Celsius (212 degrees Fahrenheit).
This creates a temperature difference of 350 to 450 degrees Celsius (662
to 842 degrees Fahrenheit). It is this temperature difference that the
TEG module uses to generate electricity, as the heat moves from one side
of the module to the other side. This movement of heat actually goes through
many hundred small devices in between the two surfaces on the TEG, and
this heat movement is what generates power.
The Optional Pan adapter is not required for the Power Pot, but is very
useful in keeping the sides of the pot clean and free of soot. The hole
in the adapter plate allows most of the heat collecting surface to be exposed
to direct heat, while sealing off the perimeter from smoke and flame exposure.
Powered by a USB port. 1/2 watt power consumption.
Flexible and adjustable metal neck.
Connect up to four  USB devices to our single USB Thermoelectric Generators.
Use this USB hub / power splitter with our USB LED lights and extension
cords to provide lighting at your camp site. This Hub splits power to dumb
USB devices like LED flashlights, camcorders, Blue tooth speakers and more.
will not work with smart phones. Smart devices like iPhone must
connect directly to our Thermoelectric Generators to charge, and will not
charge when connected to this hub.
This cable has 24 Gauge power wires for minimum voltage drop. Can be used
to power USB devices like iPhone, Lights or others 10 feet away from our
This makes a great addition to all of our Thermoelectric Generators
This tiny flashlight charges via USB.
Now you have all the charging cables you need
for all your USB devices in one handy adapter.
This cable has 10 connectors. Three of
them are the most useful. These include an apple 30 pin connector for iPhone,
iPad and iPod. Then it has a micro USB and a Mini USB. Between the mini
and micro USB it covers 90% of the modern devices out there. There are
also 7 other connectors for Nokia (2 types), Sony Ericsson, Samsung (2
types), LG and Play Station Portable.
For a list of supported
models click here.
One of the greatest inventions of all time!
Why didn't I think of that?
Now several versions of our famous Universal
You can now build your own AC / DC
A unique bracket that mounts a GM 10si
alternator to a horizontal shaft gas engine. The simple way to build
your own generator! Add a DC to AC power converter, and you have
a super high output DC charging system, as well as an AC generator. Be
aware, you must have a battery hooked up to the alternator, or you will
damage the internal voltage regulator.
We have designed and manufactured a simple,
one piece universal mounting bracket specifically for this task! This bracket
bolts to the motor (using a universal bolt pattern), and allows the alternator
to bolt directly to the bracket. The bracket also has an integral belt
adjustment slot which allows the alternator position to be adjusted, which
serves to tension the belt.
We now have 2 versions of our bracket.
The long one is the one we have been selling for years. The short version
is a new one that is intended for applications when you want a more compact
system, and have an engine with no obstructions on one side. These
brackets are designed for the small footprint GM 10SI Alternator. Larger
alternators will not fit!
Dimensions for Long version:
Dimensions for Short version:
The normal 2.5" pulley (shown here) on a GM
10si alternator is a 3/8" automotive pitch belt. You will not be able to
find a 3/8" automotive pitch pulley to go on your engine. The only commonly
available pulleys available in standard engine shaft diameters that have
key ways are Industrial "A" style models. These require Industrial "A"
The pulleys and belts we sell to go on
the engine are industrial "A" style, 1/2 inch wide. Although the combination
of automotive and Industrial "A" style belts is not the ideal solution,
it works well for most customers and is the least expensive option. The
belt rides a little higher in the alternator pulley, and at the correct
depth on the engine pulley. Extreme power users may experience some belt
wear, especially if the belt is not tight, or if the pulleys are misaligned
even to a slight degree because of the reduced contact area between the
alternator pulley and belt side.
There is a better solution! The Special
Industrial "A" Belt Pulley for GM 10si Alternator
We are now offering a special 2.5" Industrial "A" style pulley that fits
the GM 10si alternator. These will fit any of the alternators we sell,
and we will even install it for you at no cost by request. Shown here is
the same belt as it would fit our new special alternator pulley. So, for
people who plan to run their systems near capacity for extended periods
of time, we recommend replacing the standard pulley on the alternator with
one of ours.
If you already have your own alternator,
or did not buy it from us, we can not guarantee this will fit your alternator.
Please look very closly at the diagram for measurements. You may return
it if it doesn't work out, but you will be responsable for shipping costs
BOTH ways which may be more then the cost of the pulley.
Stock Fans for 10si (shown at left in photo above) and 12si alternators (shown on right in photo above). The above photo shows stock fans for the 10SI alternators
(like the 63 amp model) and the 12SI alternators.
Most asked questions:
Q: Doesn't the alternator run backwards?
in several of these projects the alternator turns in the opposite direction.
An alternator will function in either direction.
cooling an issue when the fan runs in the wrong direction?
most situations, no. The fan still functions but at reduced efficiency.
The alternators in our projects are bolted to a metal mounting plate which
acts as a large heat sink. We do offer a special bi-directional fan that
can be used in place of the stock fan. This fan is as efficient when rotated
in either direction.
can I find a reverse fan?
bi-directional fan is available from us. For a true reverse direction fan
you will find them used on '65-'69 Corvairs. But the Corvair fans have
an integral pulley which can not be removed and is not the ideal diameter.
Photo above: (back face on left, front face on right)
These fans fit the 10SI and 12SI alternators
we sell. If you already have an alternator, we can not guarantee these
will fit. They will only fit if the existing fan has a dish in the center,
and the dish points toward the alternator. See the above pictures.
Now build a generator
from a common-style lawn mower engine with our new Vertical Shaft Generator
Universal mounting pattern fits all lawn
mower engines. Same integral belt adjustment slot and alternator mounting
provisions as our horizontal design.
(Bracket allows you to mount alternator
as in the photo below):
Dimensions for Vertical Bracket:
For use with any of
our generator projects.
Sold outright! No
All alternators are remanufactured
with new brushes and bearings, right here in Eugene, Oregon.
If you plan to run your system near capacity
for extended periods of time, we recommend replacing the standard pulley
on the alternator with one of our special Industrial "A" belt alternator
Be aware, you must
have a battery hooked up to an alternator or you will damage the internal
voltage regulator if you try to rotate it at normal RPMs.
Q: How do you direct drive a generator head with an engine?
A: Direct drive shaft coupler assembly.
To connect the output shaft of an engine to
a generator head input shaft (or anything else for that matter), a special
shaft coupler is required. Basically, three pieces are needed.
Select a coupler half that is the correct
size to fit the engine shaft (or driving shaft size), then select a coupler
half that is the correct size for the generator head (or driven shaft size).
Then the two shaft couplers are joined using what is called a spider. Notice
that the shaft couplers each have 3 fingers and the spider has 6 slots.
The three fingers from the engine side fit into three of the spider slots,
and the three fingers from the generator side coupler fit into the other
three slots on the spider. This coupler assembly allows for several degrees
of misalignment between the two shafts and protect the bearings from seeing
side loads that would result from misalignment.
These couplers are available in several
sizes, but we have marked the ones that are needed for our projects:
This coupler is custom machined to replace
the nut, lock washer and pulley on a standard GM 10si alternator.With this,
and our direct drive bracket set you can build an untra compact and reliable
charging system with no belts to wear out.
We have had a few customers ask for the easy
way is to install our custom direct drive alternator coupler. First you
have to remove the nut, lock washer and pulley from the alternator. The
only practical way is to block the fan on top of a piece of wood, and use
an air impact wrench on the nut. If you don't have one, take your alternator
to any shop and pay them a few dollars to do it for you.
Now, to install our alternator coupler
you will need an allen wrench to fit the end of your alternator shaft,
and a second one goes across 2 of the ears. Hold the shaft in position
with the center allen wrench, and turn the coupler with the other wrench
as shown. Again we will install this for you on request.
The next thing need is a way to mount the
direct drive system to the engine. Shown here is the complete assembly.
Note that we do not sell completed assemblies, just the two plates.
The engine plate has mounting slots such that it can fit all engines with
bolt circles smaller or equal to 7.5 inches. This covers everything
from 3 HP to 20 HP. The plate with the large hole is where the alternator
Notice from the picture on the right that there are
spacers and bolts connecting the two plates. We do
not provide the bolts or spacer tubes. The engine plate comes with
nuts pre-welded to the side of the plate that faces away from the engine.
This is done so that the surface of the plate that touches the motor is
free of obstructions.; The spacer tubes need to be large enough in
diameter that they can sit over the nuts (the nuts sit inside the tubes).
In the example shown, we used square tube for the spacers but we have also
used 3/4 electrical conduit for the spacers. The
length of the bolts and the length of the spacers must be determined at
the time of assembly and are not provided.
Battery master disconnect kill switch for cars and trucks with top post batteries. This switch fits the negative post of all top post batteries. This extremely handy cutoff switch enables you to quickly and easily disconnect your automobile battery for safety, servicing, or storage. They are recommended by classic car insurance companies and required by many auto storage companies.
As shown in the photo, you simply install this battery isolator switch on the negative post of your top post battery, then attach your battery cable to the back of the switch and you are done! To engage power simply hand tighten the green knob and slightly loosen the green knob to disconnect all power. The green knob can also be completely removed to help discourage unauthorized use.
These same switches often sell for $13.95 at specialty shops and are highly recommended for all classic and antique cars.
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Epicenter Supplies, LLC • 384 Wallis Street #2 • Eugene, OR 97402
Phone: 541-684-0717 • Fax: 541-338-9050
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