I am looking for a 12 volt 24 hour programable timer. Something like
the timers you plug lights or appliances into only for a 12 volt
system. I am looking for something that I can hook up to my solar
system. It would connect between the battery and the power inverter.
The purpose would be to turn on the inverter when it is needed at a
set interval and turn it off again about 7 hours later. This way I
dont have a continual drain on my batteries keeping the inverter
running when it is not needed.

Hi

I suppose then one of these would do:

http://www.merchantamerica.com/superfeeders/index.php?ba=view_category&category=1081

You may also find that at marine
http://www.bepmarine.com/PDF/501.pdf#search=%22timer%2012%20V%22

and auto accessories dealers
http://shopping.lycos.co.uk/9428en844608.html

Hedgie

---

Clarification of Answer by hedgie-ga on 25 Sep 2006 03:53 PDT

Dear rescuer

If instead of hasty rating you would explain what wrong with these
(included in my answer)


24-HR Lamp/Appliance timer/15-min. tabs/two grounded outlets!	Heavy
duty lamp and appliance timer with DUAL three prong outlets (one also
on other side not shown) which are both controlled by timer.
		More Details >>
	$14.95	> ORDER NOW

7 Day Digital Timer With Ground--20 on/off cycles	Provides up to 20
(i.e. Sat. Sun. Mon. Wed...) daily ON-OFF times throughout the week
with digital accuracy.
		.....


  
 I would find other options  and help you to solve your problem.

However, I must respect your choice --

so 

good luck

Hedgie

---

Request for Answer Clarification by reptilerescueca-ga on 25 Sep 2006 10:53 PDT

I do appreciate your effort, but none of these timers will allow for a
continuous operation time of 7-8 hours. yes they are programable but
the longest time that the timer is on for one of them is only 4 hours.
The others average about one hour of on time. I need a constant on
time of 7-8 hours without interuption. While a multiple timer with a 4
hour duration can be set to come back on and complete the required 7-8
hour cycle, it is not continuously on for the required amount of time.
If you can find me a timer that will keep the appliance on for the
required time out of 24 hours then you meet the requirements of the
question. Any less time is unacceptable.

---

Request for Answer Clarification by reptilerescueca-ga on 25 Sep 2006 11:04 PDT

I also forgot to mention that the last link is in the UK and they do
not ship to the united states so even if it were to work for the job,
I couldnt get the item anyway. Too bad to because it looks as though
it might have worked... sigh

---

Clarification of Answer by hedgie-ga on 26 Sep 2006 02:54 PDT

reptilerescueca-ga

  You really should read the how GA works
http://answers.google.com/answers/faq.html

Google charges you when the question is answered. You have a right to ask
for clarification (even to add some limitations - like 'I live in US-CA' etc
...even though all that should be specified in advance)

If that RFC dialog does not solves the problem, you have a right to a refund.

See entry
What if I don't like my answer? Can I get a refund?
http://answers.google.com/answers/refundrequest

Once the question is rated  - researcher has no
motivation to continue the search and a dialog.

When answer is rated this low - and without a RFC dialog - 
s/he may also conclude that there is no point to continue the dialog
due to customers lack of cooperation and appreciation.

Anyway - I suggest that you ask for refund (it may be granted even though
you already rated the answer) -- I have no objections.  Keeping one * rating is
not worth $10.

You can post the question again (after you read the terms of service) and
mention all requirements.

Also explain why a common sprinkler timer from Home Depo would not work for you.

They do run on 12V and can be programmed for hours, 
there are other simple solutions 

I also assume that you have a battery in the setup - - you may explain that too -
but - in the next question pleae. This one you closed.

Hedgie

The question was to find a 12 volt timer that would run a 12 volt
appliance for a period of 6-7 or more hours. All of the timers
suggested would run for a period of less than 4 hours, most are 120
volts in and 12 volts out. I specifically asked for a timer that could
be placed between the power inverter and the battery in order to turn
the inverter on for the required time then turn it off again. Not even
one of the suggested timers even came close to this goal, with the
timed function ranging for between 15 seconds to 4 hours none would do
the job as requested.
for example here is one of those suggestions that was marked as
answered... "24-HR Lamp/Appliance timer/15-min. tabs/two grounded
outlets!	Heavy
duty lamp and appliance timer with DUAL three prong outlets (one also
on other side not shown) which are both controlled by timer."
 If you read it carefully you will find that it clearly states that it
has dual three pronged outlets which means 120 volts in and quite
possibly 120 volts out! I clearly stated that I needed a timer to go
between the battery and the power inverter which is of course for 12
volts in and 12 volts out because this was to be placed between a
power inverter and a battery.
This one "7 Day Digital Timer With Ground--20 on/off cycles	Provides up to 20
(i.e. Sat. Sun. Mon. Wed...) daily ON-OFF times throughout the week
with digital accuracy."
only runs for a period of 100 minutes not 6 hours!
Please consider this refund request as I feel that I wasted my time
even giving this a try...

Although these are all timers, none of them do the job. I need a timer
that can turn something in a 12 volt circut on for a period of 6 or 7
hours, not minutes to an hour.

http://www.specialtyconcepts.com/1to16.html

all I can find on that link are charge controllers, this is not what I
am looking for. What I want is something that works like a light or
appliance timer that turns on a device at say noon and turns it off at
lets say 7 pm every day. This way I can wire it into my power inverter
and turn it on only during the times of the day that it will be needed
to run the auxillary pond pumps. I need it to be 12 volts because I
need it inline before the power inverter not after it. This way my
seconcary pond pumps turn on each day at 1pm and off again at 7 pm. If
I use a regular appliance timer pluged into the power inverter, then
the power inverter is on 24/7 instead of only when it is needed. I
just cant see wasting my solar output to run the inverter when it is
not needed.

A common sprinkler timer will not do the job because it is designed to
only open a flow of water at a preset time and shut it off again at a
preset time. As far as I have found they are not designed to turn on
and off an electrical item, even if it is only 12 volts. They only
open and close an internal water valve in the unit, on a faucet that
is already turned on. I clearly stated that the timer would need to be
connected between the battery and the power inverter and have the
ability to turn it on for a period of at least 6 hours and then turn
it off again. Although a sprinklet timer is low voltage (6-9 volts),
what I require is much more complicated than moving a ball joint to
allow water to slip thru. It would work just fine if I were filling my
pond from the faucet but does nothing for running lights or pumps. The
idea here was to turn on and then to turn off the power inverter after
at least 6 hours of running time to save battery power. Shorter
operation times will not do the job. The timer is required to be 12
volts in because the battery is 12 volts, a timer that is designed for
lets say 6 volts would be damaged by a 12 volt system to the point of
being useless. A timer that is 110 or 120 volts in would not work
because the system it is plugged into does not carry enough current to
support the timer. A timer that has a transformer in it becomes a
power inverter and would eat up too much battery power because it
would use the same amount of energy that I would use running the
inverter 24/7.