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If I have one solar panel, and four 12v batteries I need to be charged, two pairs of equal age and capacity (60 amp hour x 2, and 50 amp hour x 2) and the pairs have the same resting voltage and seemingly the same capacity, and I can get a solar charger unit which can charge two batteries (see link below), I was thinking of charging each pair in parallel.
I've read about the risks of charging in parallel, with the weaker battery having the dominant impact and bringing the other battery down to its capacity, but in reality, how likely is this to be a problem in the course of 5 years, where the batteries won't be used that much anyway, maybe discharged 20%, just 10 times a year?
I'm conscious there is scope to discuss lots of things around this, like "buy pairs of new batteries rather than starting out with old ones" and "buy larger capacity new batteries etc", but this is the set up we have and will be sticking with.
Thanks for any replies.
Has anyone used the celestron lithium powertank (the small one, not the pro version) with a skywatcher HEQ5?
It looks like it should be perfect but that is coming from someone who is relatively clueless
From the skywatcher specs, it looks like the mount needs 2 amps of current, and the powertank supplies 3, so that should be good?
It also looks like the power cable is a double-ended tip-positive 2.1 mm plug, so i assume that even though it doesn't have one of those 12V car battery inputs, it shouldn't matter right?
(just to save people some time, i'm not going to bother with a lead battery / leisure battery / jump-start pack / etc)
There will probably be too much information below, but my level of knowledge in electronics is unfortunately low.
I own a EQ-5 - upgraded to pro with synscan, a SW 150pds and a SSAG guidecam on a 9x50. I bought this with the purpose of AP. I have my telescope on the porch, so i can sit inside with the PC (5m distance) and power everything from the socket in the wall inside.
I live in Norway where there is 230V 50hz AC in the wall.
I have understood most telescope equipment (?) is powered by 12v DC.
The mount came with a 12V "car-connector" which im sure people are familiar with. But i didnt wish to use this, so instead i bought a plug (European), which the picture below shows. It is like a multipurpose plug where i can choose 12V and also choose different "pc-style" connectors in the other end.
I am currently powering the mount via this plug to a 20m extension cord with 4 sockets. It's labeled "250V AC 50HZ". (picture below)
I plug the USB3-powered SSAG straight to the computer. I plug the synscan controller to the computer with an adaptor to make it USB in the other end.
So to the core of this post:
I now have an ZWO ASI1600MM PRO (DC 12V 3A), with a 8 slot ZWO filter-wheel (USB2.0 powered - guess this connects to the camera). On its way.
I also have a NEQ6 PRO on its way (12V 2A) - so no more EQ5 - but same power requirements.
And lastly i have a HitecAstro 4 channel dew controller on its way (12V DC) - which i plan to use with a Omegon secondary mirror heating strap, SMALL (https://www.astroshop.eu/heater-bands-controls/omegon-secondary-mirror-heating-strip-small/p,56529#tab_bar_1_select), and maybe something else down the line. The strap uses 0,18amps the product specifications says.
So....... With this setup, and from home like described:
-Plan is to use the 12v 2.25A adaptor-plug from the EQ5 on the NEQ6.
-Buy another one just like it, for the dew-controller. I dont know what Ampere it needs, but the dew-strap is only 0,18A.
-Buy a upgraded 12V 3A (or 5A) for the ZWO ASI1600 and 5m USB3.0 to PC.
-Plug filterwheel to ZWO.
-Plug guidecamera to PC as before - Or can this go straight to the ZWO?
-Plug the EQ6 via the Synscan ST4(?) to USB 5m to the PC.
So the mount, the ZWO and the dew-controller will go to the extension cord-cable drum outside which goes to the wall inside.
The PC will go to the wall inside ofcourse.
Can i do this?
2. If no: How should i do this?
I tested the tracer polymer battery over a six hour period and although the red light on the HEQ5 flashed most of the time, and more rapidly as time went on, the mount moved so that the time on setting circles changed by six hours, suggesting the mount will track OK. (the test was carried out during the day). I did not try to get the telescope to point in a different direction using the handset.
1) Should I be bothered by the flashing lights on the HEQ5 mount?
2) Is tracer misleading people by saying their batteries are 12 volts? (they say that their discharge curves are flat)
I found that the battery's voltage falls. Below is from the Tracer datasheet.
Built-in Fuel Gauge - 5 colour LED fuel gauge mounted externally to show charge level. LED Status:
3 green & 2 red: Battery fully charged 11.7V
2 green & 2 red: Over 50% capacity 11.4V
1 green & 2 red: Over 20% capacity 11.1V
2 red: Less than 20% capacity 10.7V 1 red:
Less than 10% capacity 10.3V No lights: Battery empty 8.25V
While we all know that there are plenty of hubs out there in the market like Hitec Astro Hub and Pegasus Astro Hubs for providing 12VDC and USB comm link for good cable management, I am a DIY person with little to no experience in electronics. I do know how to solder reasonably well.
I am looking to see if someone here could help me with a circuit diagram for a hub that gives has 5x12VDC output, 3x5VDC output and 4xUSB powered hub for communication. I would then go out, purchase all components and build one for myself.
This is only so that I don't have too many cables dangling off of my mount and becoming a constant trip hazard.