David, I'm more interested in keeping track of the DC elements of the circuit > monitoring the power coming in from the solar array and the power out of the battery banksOriginally Posted by DavidK
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David, I'm more interested in keeping track of the DC elements of the circuit > monitoring the power coming in from the solar array and the power out of the battery banks
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I dug up my notes for some of the stuff I'd been researching last summer for charging batteries and came across notes for the texas instruments UC3906/2906, i think it would be better than the linear regulator/resistor combo for charging so I'm posting the data sheet in case anyone wants to look at it with me... actually the data sheet won't upload but I did post another document I found on the 2906/3906
The data sheet is pretty straight-forward... although I'm having some difficulty determining the resistor values necessary to indicate to the charger ic the bulk charge rate and for how many cells it's charging... maybe someone can make sense of it...
Last edited by RYTECH; - 26th February 2008 at 16:07.
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May be you should have a look to AN U104 ... ( U for UNITRODE )
where it is clearly explained ... with the scheme ( ! )
Alain
Last edited by Acetronics2; - 26th February 2008 at 16:17.
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Why insist on using 32 Bits when you're not even able to deal with the first 8 ones ??? ehhhhhh ...
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IF there is the word "Problem" in your question ...
certainly the answer is " RTFM " or " RTFDataSheet " !!!
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Thanks I've posted that document in case others wish to review it.
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Are you still working on this?
Right now i'm working on getting the parts together to start a small solar power system for my shed. At least give me lighting and some ventilation fans. I already have a few of the high power chips from allergo for reading amperage from the batteries and the panels. I am starting to work on the schematics and deciding which pic I want to go with. I would be interested in working more on this.
Jerry
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RYTECH,
Do you need the solar panels ONLY for charging?
I did not get it clear enough with the posts above.
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"If the Earth were a single state, Istanbul would be its capital." Napoleon Bonaparte
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Hi people... sorry for the delayed response, i've gotten somewhat sidetracked designing a perpetual motion machine...lol...
as for the power system.. I would like it to a) recharge the batteries and b) supply the load with any additional unused power from various input sources...
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Re: 18F4550 Solar battery charger / regulator & inverter system
NEWARK and MOUSER sell the PB137 it is a 13.7V version of the 7815.
13.7V is the perfect voltage for Sealed Batteries, you NEVER EVER WANT TO OVER CHARGE THEM 14.1V is the absolute max.
GEL CELLS will never heal from overcharging, the bubbles form and push the mat away from the plate, the bubbles do not dissolve or move.
I like your idea, you could measure the amount of current flowing IN to the batteries if they are not receiving then you can by pass shunt off the excess.
On ebay many folks are sellling dc-dc converters, you can use these to stabilize the power from the panels
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