Re: Request comments on simple solar charger

Hello Lewin,

Reference to what, exactly? The comparator is powered off a 5V
switcher. The various R dividers there are designed to trip the
comparators when the difference between the two sides of one of the
batteries (i.e. the nominal output voltage) falls below a predetermined
lobat threshhold. Now I come to think about it, the low side
comparators should have dividers at their -ve inputs also.


For comparing two sides, ok. But what for is the connection at + of BAT1?

Currently you seem to just charge away and there is no reference voltage against which a battery status of "full" would be measured. Regulator chips usually only come in discrete varieties such as 9V, 12V, 15V, neither of which is suitable for lead acid 13.8V limits. You'd need at least an adjustable regulator and then there has to be a resistor from ADJ to GND.

Amother thing you need is diodes to block discharge when there isn't enough light.

Well, do recall what I said in an earlier posting, that there are
actually two sets of everything you see here, and the controller is
capable of switching in a good bank to take over from a bad bank.

Then I would keep them completely autonomous but you have a connection in there. Also, allowing two panels to work on both batteries would provide more redundance than splitting it up completely.

Regards, Joerg

http://www.analogconsultants.com
.

Relevant Pages

  • Re: Solar-hydrogen home power system?
    ... > The down side may have you consider batteries instead. ... > The biggy for you will be that the voltage is not constant. ... you will need a switcher that is tailored for caps. ... To control a motor of any type efficiently, you really need some kind of ...
    (sci.energy.hydrogen)
  • Re: Solar-hydrogen home power system?
    ... > The down side may have you consider batteries instead. ... > The biggy for you will be that the voltage is not constant. ... you will need a switcher that is tailored for caps. ... To control a motor of any type efficiently, you really need some kind of ...
    (sci.energy)
  • Re: 64 bit Windows driver.
    ... engineers at the "old HP" would have definitely stuck with 3 ... batteries and a switcher and not the 4 battery/linear regulator scheme! ... you figure that people might replace the batteries even just 10 times over the ...
    (comp.sys.hp48)
  • Re: 64 bit Windows driver.
    ... batteries and a switcher and not the 4 battery/linear regulator scheme! ... you figure that people might replace the batteries even just 10 times over the ... it's not really a huge amount of money for an individual one way or ...
    (comp.sys.hp48)
Quantcast