Jump to content

sgl_imaging_challenge_2021_2.thumb.jpg.72789c04780d7659f5b63ea05534a956.jpg

Recommended Posts

I asked a few weeks ago about charging two batteries from one solar panel. I’ve now got a solar controller which can do this, see below, but I’m confused by the instruction manual, especially how I should set the “charging priority”. I assumed the unit would charge battery 1 until full, then move on and charge battery 2 until full, then go back to 1. I’m not sure what this charging priority is - image of the relevant page from the manual below. I’d be grateful to hear what you think it means.

Thanks.

James.

6726E601-6072-4A3B-AB09-3BC3FF4765BE.jpeg

1A8311DF-94FC-4700-95A5-7F4C5F017954.jpeg

Edited by jambouk
New title
  • Like 1
Link to post
Share on other sites

It looks like the default priority of 9 will be like you assumed. If your solar panel delivers 1A for example, then battery 1 will get 900mA and battery 2  will get 100mA. When battery 1 is fully charged battery 2 will then get all the current. If battery 1 starts discharging then it will go back to the priority setting currents again.

It doesn't say what happens to battery 2 when both are fully charged. Hopefully it stops charging like battery 1 does when it is fully charged.

If the normal load on battery 2 is higher than battery 1 then you can lower the priority number so that battery 2 gets a bigger share of the solar panel current.

If you set it to priority 5 they will each get half the solar panel current.

All four of your batteries need to be of the same type. I assume they are from your previous post. Just different capacities. Battery 1 can be your 2 60Ah in parallel and Battery 2 can be your 2 50Ah in parallel. Or vice-versa. :smile: 

Alan

Edited by symmetal
  • Like 1
Link to post
Share on other sites

Thanks.

I've ditched the two batteries in series idea for the time being, and just going to stick two big batteries in isolation,one connected to each of the outputs of the dual solar charger.

If the two batteries are the same, and the load placed on each is the same, would you set the charging priority to 50:50? I'm still not really sure why the maximum I can send to battery one is 90%, and why I can't send 100% to battery one until its fully charged, then send 100% of power to battery two etc.  Or is it sending 10% to battery two by default to at least put a bit of power into battery two to prevent it from degrading whilst battery one charges up?

James

 

  • Like 1
Link to post
Share on other sites

In the situation where you had a significant load on both batteries you may end up with battery 1 not reaching full charge and if you had that set to 100% priority then battery 2 would never get charged. 90/10 priority ensures battery 2 would at least get some charge. Once one battery is fully charged the other one gets the 100% charge anyway from the solar panel.

If the load on both batteries is similar then a 50/50 priority may be best to avoid battery 2 not receiving enough charge on dull/short days. If the solar panel puts out enough to comfortably charge both batteries then the priority is not really important.

Alan

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By sandconp
      I currently have a ZWO 178MC OSC planetary camera.  Everybody tells me that I need to get a mono chrome camera for solar imaging. I have narrowed it down to two cameras the ZWO ASI178MM or the ASI174MM.  The ASI174MM is quite a bit more expensive and I am not sure why?
       
      I have a Lunt 60MM HA f/7 Solar scope and looking for recommendations.
       
    • By chops
      I'm posting in the hope it helps anyone else considering a Daystar Scout SS60. The video's not quite representative of what one sees looking through the scope, but gives a general idea of field of view through a 24mm EP.  When observing, much more prominence detail and surface texture is visible to the eye and the colour feels less red than it appears in the vid.
      I'd have taken this video sooner if I'd realised that afocal video would work so well, so I'll try again next time the sun's available earlier in the day during better seeing. The video's taken by holding an iPhone against an Explore Scientific 24mm eyepiece and adjusting exposure (i.e. afocal video photography). Although I find a Plossl as easy (if not easier) to use as a wide EP for observing, it's simpler to align a smartphone with an eyepiece that has a wider field of view, for afocal video. Hence I used a 24mm ExSc (see below for detail). It seems a fairly quiet solar day, not long after the notoriously quiet 2020 and I believe is still close to the beginning of the sun's new 11 year cycle (hopefully it will become more exciting soon but not as exciting as having any Carrington Events pointing towards us).
      I spent some hours, from late morning, watching these prominences form, dissipate and reform. The prom on the Western limb was very tall and bright, looking like a large rectangular tower block, which gradually split, faded as the top looped over to the north, then the top looped back again to the south. At one point this loop appeared to join - forming the outline of the head of a man, whose figure, with arms out, was clear and rather funny. Wish I'd taken this video sooner (or had the ASI183 to hand). The prom quietened and reached its current state (3pm ish) as seen in the video.
      The long group of prominences to the South - 4 main and some smaller - were more dim than the prom on the Western limb initially, but they remained impressive, ranging from good to very small and appeared at one point to be as clear row of pine trees, especially the larger right hand prom, with spiky 'branches' and a distinctive triangular fir tree shape, which gradually brightened then faded to this view. The tip of the ‘sharks fin’ to the left of the group extended out to the east then receded.
      I'm afraid it's not easy to see the detail in such a simple video - it's slighly more visible to the naked eye. By the time I took this video it had gone 3pm, there was more haze and a lower sun and none of the prominences were particularly impressive.
      There were No sunspots easily visible, although a Plage appeared to be visible close to the Westerly limb. Little surface detail other than orange peel, despite tuning the scope (better with the SS60s dial to left of centre for this today). I still need to lots more time with the scope to get the best from it.
      I'm a Ha beginner having only observed in whitelight before and only having used this scope twice before, once in combination with a ZWO ASI 183MC astrophotography video camera. Medium seeing, 6/3/21 'third light' on the Daystar Scout SS60 Scope with fixed chromasphere quark built in - 930mm f15 60mm.
      Various Eye pieces used: Plossl 40mm, Meade Super Plossl 26mm, Explore Scientific 24mm and 11mm 82 and 68 degree EPs gave good clarity and contrast, but the seeing's not good enough for close viewing of proms.  ioptron motor, roughly pointed north was perfectly sufficiently good to keep the sun in view for at least 45 mins at a time. I'll edit this post to add a pic or two of the equipment setup in a moment.
      3 images attached are: Afocal Smartphone still image (contrast increased in smartphont), plus two shots of the setup.
       



    • By jambouk
      Has anyone set up 12v CCTV for an observatory which can either connect to WiFi or be accessed remotely by directly connecting to 4G via a mobile data plan SIM card?
    • By aramitsharma
      Solar Setup for sale

      I have put this on sale twice but had changed my mind both times, but think I can finally let this go:
      Entire solar setup including:
      Quark Chromosphere with power cable
      Skywatcher ST102 with skywatcher autofocuser and Hitech Astro DC focuser controller- This makes fine focusing a breeze as you can focus right from the laptop screen covered with dark cloth without going to the telescope.
      Baader UV/iR rejection filter 2”
      Rowan astronomy tilt adapter to take care of Newton rings
      Relevation astro 2” extender for straight through imaging
      £1100 cash or bank transfer or paypal with fee(I had previously listed this for £1200). Pickup from London
      The quark is good for imaging. Images have been published in Sky at Night, once in the magazine and once on the website.
      Sample images attached. Setup shows entire setup (camera and mount not for sale)
      Quark and accessories- £900
      Scope with autofocuser and Hitec Astro DC focus- £175


    • By Kitsunegari
      updated to 85 frames,  more frames still prcocessing.
       
      20 minutes of time represented here.
      127mm x 1200mm + meade 2x shorty.
       
       

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.