Chinese Charge Controllers

lazzalazza Posts: 330Solar Expert ✭✭✭
HI

I have to confess a sin. I've bought some chinese charge controllers because they were very cheap :blush:

Now they work, and do the job. However, having studied their charging profile. Although it says that absorption is at 28.5V and float at 27V... really absorption is at 26.5V for half an hour and then drops down to 25.5V. They carry on supplying power and charging, but... the batteries at the end of the day are only at 24.8V (80% charged i suppose)..... whereas experimenting with a Xantrex C40 leaves them fully charged at 25.2V.

My question is: Is there any way of fooling these charge controllers into giving 2V more? so that the batteries are charged at more adequate voltages?

Comments

  • vtmapsvtmaps Posts: 3,738Solar Expert ✭✭✭✭
    Re: Chinese Charge Controllers
    lazza wrote: »
    My question is: Is there any way of fooling these charge controllers into giving 2V more? so that the batteries are charged at more adequate voltages?

    Maybe. Do they have temp compensation? Do they have settings for different types of battery? Do they have any adjustments at all? Can you open the units and see if there are any dip switches or potentiometers?

    Any of the above may sometimes be used to fool a charger.

    --vtMaps
    4 X 235watt Samsung, Midnite ePanel, Outback VFX3524 FM60 & mate, 4 Interstate L16, trimetric, Honda eu2000i
  • lazzalazza Posts: 330Solar Expert ✭✭✭
    Re: Chinese Charge Controllers

    Mmm doesnt seem to have any of what you've mentioned- here's a picture of the circuit board: Attachment not found.
  • CariboocootCariboocoot Posts: 17,615Banned ✭✭
    Re: Chinese Charge Controllers

    Learn the lesson, throw it out, get a good one.
  • westbranchwestbranch Posts: 5,103Solar Expert ✭✭✭✭
    Re: Chinese Charge Controllers

    what does the exterior look like.? Brand?

    I think I might have one of those with the 10 or so 'after dark' light activation settings. Mine seems to do a better charge job. Will try to get #'s this weekend, and report. On an RV 12 v batt.
     
    KID #51B  4s 140W to 24V 900Ah C&D AGM
    CL#29032 FW 2126/ 2073/ 2133 175A E-Panel WBjr, 3 x 4s 140W to 24V 900Ah C&D AGM 
    Cotek ST1500W 24V Inverter,OmniCharge 3024,
    2 x Cisco WRT54GL i/c DD-WRT Rtr & Bridge,
    Eu3/2/1000i Gens, 1680W & E-Panel/WBjr to come, CL #647 asleep
    West Chilcotin, BC, Canada
  • lazzalazza Posts: 330Solar Expert ✭✭✭
    Re: Chinese Charge Controllers

    Here it is- yes it's with those 10 or 20 light activation settings for the 12V/24V direct loads: Attachment not found.
  • westbranchwestbranch Posts: 5,103Solar Expert ✭✭✭✭
    Re: Chinese Charge Controllers

    Lazza, my meter at the batt posts was 13.75v in float so for your bb i should be getting ~ 27.5v Float. no load on it so unable to check Absorb voltage.

    They're cheap enough to buy a second one...no?
     
    KID #51B  4s 140W to 24V 900Ah C&D AGM
    CL#29032 FW 2126/ 2073/ 2133 175A E-Panel WBjr, 3 x 4s 140W to 24V 900Ah C&D AGM 
    Cotek ST1500W 24V Inverter,OmniCharge 3024,
    2 x Cisco WRT54GL i/c DD-WRT Rtr & Bridge,
    Eu3/2/1000i Gens, 1680W & E-Panel/WBjr to come, CL #647 asleep
    West Chilcotin, BC, Canada
  • SolarPoweredSolarPowered Posts: 626Solar Expert ✭✭✭
    Re: Chinese Charge Controllers

    EVERYTHING IS MADE IN CHINA.......
    Or the Philippines, Tawain.......

    You will only find roughly under 10% of solar products made in america, canada, or germany...

    Such as Concorde Batteries, Rolls, or SMA.........

    Dont feel bad.

    Even if it is assembled in the US or canada, the parts are probably more than likely Chinese. Like canadian Solar panels, they are literally a yingli panel that is rebadged for canadian solar, they are the same cells!

    Just research better, for $30 more than the cheapest controller there is a better one out there......
  • PhotowhitPhotowhit Posts: 4,747Solar Expert ✭✭✭✭
    Home system 4000 watt (Evergreen) array standing, with 2 Midnite Classic Lites,  Midnite E-panel, Prosine 1800 and Exeltech 1100, 660 ah 24v ForkLift battery. Off grid for @16 of last 17 years. Assorted other systems, and to many panels in the closet to not do more...lol
Sign In or Register to comment.