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12 v power source

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#1 boandpokey

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Posted 21 January 2014 - 01:33 PM

need an idea on a single source to run mount, dew shields, laptop, etc from the field

#2 boandpokey

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Posted 21 January 2014 - 01:35 PM


this doesnt look too awful


http://www.ebay.com/...X-HOLDER-W-B...

#3 frolinmod

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Posted 21 January 2014 - 03:55 PM

1. A 12V deep cycle battery and battery box from Walmart.

2. Some large self adhesive Velcro rectangles from Walmart or Home Depot.

3. A 3/8" ring terminal to anderson powerpole battery adapter cable from powerwerx.com.

4. A RIGrunner 4005 from powerwerx.com.

5. Some anderson powerpole to cigar lighter socket adapters as needed (and if needed) from powerwerx.com.

Velcro the RIGrunner 4005 to one side of the battery box, connect the cables and you're all set.

You might want to purchase more and different amperage ATC fuses as well. Walmart, Powerwerx, Ebay, or any auto parts store has them.

Cigar lighter sockets are the pits. Either cut off the cigar lighter plugs off all your cables (that have them) and replace them with anderson powerpoles or if you're lazy like me just purchase and use pre-made replacement adapter cables from powerwerx.com.

#4 Phil Sherman

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Posted 21 January 2014 - 04:06 PM

The question you need to ask is "how much power will I need?". Once you have an answer, you'll know what size battery to get wbich will determine a minimum case size.

If you want the best battery life, plan on getting one with 2x the capacity you'll need between recharges. Wet cell deep cycle batteries are very heavy but are often the most cost effective field power solution. Marine deep cycle batteries are usually hybrids, and are less expensive than true deep cycle ones. Sealed batteries with gelled electrolyte are spill proof, have great discharge chsracteristics, and are very expensive.

Any lead acid battery should be charged using a multi stage "smart" charger. The maximum charge rate of the charger skould be matched to thr battery's capacity.

Phil

#5 Carl N

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Posted 21 January 2014 - 09:39 PM

What's your budget?

#6 boandpokey

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Posted 21 January 2014 - 10:34 PM

What's your budget?


well enough to get good equipment

#7 psandelle

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Posted 22 January 2014 - 12:17 AM

Anderson Power Poles/Powerwerx all the way.

Once you figure out how many amp-hours you need for your rig, then it's the choice of batteries. I went higher end LiFePO4 (expensive, but worth it to me): they're lighter, you can run them down to almost 0%, and they hold their charge in storage for months and months.

I have a 20ah for my laptop and an 80ah for my mount, focuser, CCD camera, guider, Flatman, USB hub, etc. I can go two full nights without sweat.

Paul

#8 SweenyTodd

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Posted 22 January 2014 - 04:20 PM

I certainly agree with converting everything over to power poles. I have found the crimping tool that powerwerx sells works very well. I don't mean to start a crimp/solder thread. I crimp where appropriate and solder where appropriate.

#9 RTLR 12

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Posted 23 January 2014 - 09:02 AM

FYI...Amazon has a deal on Schumacher XP2260 jump packs. 26 Ah battery and Smart Charging.

http://www.amazon.co...0030_em_1p_0_ti

Stan

#10 Carl N

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Posted 23 January 2014 - 12:11 PM

I just bought 2 140ah (@ 8 hour), batteries. That should be equivelent to 170ah @ 20 hours. the total cost for both was $250. They are heavy, 106lbs each. But, they will provide plenty of power for my hilltop observatory and deck. I suggest searching for local battery places that carry deep cycle batteries and ask for any "blemished" specials. I got these batteries at over 50% off.

#11 N_DD

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Posted 23 January 2014 - 02:40 PM

Hi,

I just asked in another thread, but did anybody try with lithium-polymer batteries? Something like this could provide 15 AH with 12 V for the mount and simultaneously 19 V for a laptop, weighting only a fraction of lead acid batteries.

Nico

#12 Carl N

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Posted 23 January 2014 - 02:46 PM

N DD, I think if you wanted to power with this it would work, but not for long. If you only need 15ah for a full night's work it would be good. But my guess is that a laptop alone would only be a couple hours on this, much less the mount or other gear.

#13 ccs_hello

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Posted 23 January 2014 - 07:01 PM

Nico,

I doubt the product you linked is 15Ah at 12V. It is actually 15Ah at 3.7V (or at 5V) which most of these Li-Ion pack based products are all doing nowadays. Call that goofy marketing.
This is just the same old story happened in the past. See this CN thread.

Clear Skies!

ccs_hello

#14 takfs78

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Posted 24 January 2014 - 11:56 AM

are the new LiOn powerbanks good for AP? They are much lighter and compact for the same Ampere hours. Some can output at 12V & 19V for notebook too like the Energizer XP18000A.

#15 N_DD

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Posted 24 January 2014 - 12:24 PM

Thanks for the link, ccs_hello, now it's a bit more clear how to interpret these 15 AH. Still, powering my laptop for 4-5 hours won't be that bad. I am using a very basic drive (an old Vixen GP, motorized in both axis and driven by a DD3 controller) and on the specs it should need 0.5 A while tracking. Using 8 D-sized cells I get decent tracking for several nights. The laptop also drives a QHY5L-II camera, and that would also drain some power. I think my grand total is around 2 A, therefore a jump-starter might still do the job...

#16 rgsalinger

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Posted 24 January 2014 - 01:26 PM

I have a jump starter powering my mount, focuser, 17" laptop, and two cameras. Mount is an iEQ45, cameras are SBIG8300. I can run 12-15 hours on it. It weighs maybe 25 pounds. Having said that, if I thought I needed two nights or more power I'd definitely go the deep cycle marine battery route, just not necessary for my simple AP rig and one night of astro-fun.
Rgrds-Ross

#17 boandpokey

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Posted 24 January 2014 - 01:36 PM

I have a jump starter powering my mount, focuser, 17" laptop, and two cameras. Mount is an iEQ45, cameras are SBIG8300. I can run 12-15 hours on it. It weighs maybe 25 pounds. Having said that, if I thought I needed two nights or more power I'd definitely go the deep cycle marine battery route, just not necessary for my simple AP rig and one night of astro-fun.
Rgrds-Ross


how many outlest do you have?? seems like u need a lot of holes..

#18 boandpokey

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Posted 24 January 2014 - 01:38 PM

FYI...Amazon has a deal on Schumacher XP2260 jump packs. 26 Ah battery and Smart Charging.

http://www.amazon.co...0030_em_1p_0_ti

Stan


pretty sharp looking..

#19 frolinmod

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Posted 24 January 2014 - 02:09 PM

pretty sharp looking...

Have you looked at the reviews? Ouch. I wouldn't touch it.

#20 Stargazer3236

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Posted 24 January 2014 - 05:15 PM

Harbor Freight Tools is having a sale on the Centech 3-in-1 Jump battery, Power Supply and worklight.

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#21 Stargazer3236

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Posted 24 January 2014 - 05:16 PM

It is 17ah with a 12vdc outlet.

#22 RTLR 12

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Posted 24 January 2014 - 07:24 PM

pretty sharp looking...

Have you looked at the reviews? Ouch. I wouldn't touch it.


I just read the 58 or so good reviews. I don't put much store into reviews anyway. I find that the majority of the problems are self inflicted. I have dealt with batteries and battery customers for a very long time and I know how things work.

Stan

#23 DTH

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Posted 25 January 2014 - 02:43 AM

Here's what I use:

MinnKota Trolling Motor Power Center

Vmax1000 40AH AGM Hi performance battery

Battery Tender 022-0157-1 Waterproof 12 Volt Power Tender Plus Battery Charger

Not to heavy--just right for me, way plenty of power for my needs--but sounds like you will need more amps, can safely charge battery with no worries of leaking, and can't over charge the battery.

It's not cheap, but it's safe and very reliable. I love AGM batteries.

#24 Yun-Oh

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Posted 25 January 2014 - 03:31 PM

Harbor Freight Tools is having a sale on the Centech 3-in-1 Jump battery, Power Supply and worklight.


Be careful with this unit. There are two versions of exactly the same battery and one has smart charging, the other one not.

The red one does not have smart charging. It means that you have to unplug it when it is fully charged, otherwise the battery degrades. There is a yellow one shown below.

http://dealspl.us/To...r-pack-with-...

Harbor Freight Tools used to have it, but I can't find it on its web site anymore... This one has smart charging, so you can keep it plugged in all the time (it is actually recommended in the manual).

I have two yellow versions, and they are great. One powers my imaging rig and the other my visual rig. It lasts whole night with dew shield/strap, mount, camera, and laptop running off one. And if you need more power, you can just buy one more. :smirk:






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