On 26/07/13 17:02, Craig Carmichael wrote:
> If the power sources supply quite similar voltages, or if they're
> operaing at different times, diode isolation into a DC to DC step down
> converter with a flexible voltage input may be sufficient.
Do that with my 'mains' charger and it won't even start. It requires a
battery voltage. If there little background noise you can hear the
switching converter turning on and off many times a second. It sends a
burst of current then stops and listens.
If you put isolation diodes on it's output, it won't get the sense feed
back and fault. If you have another current source in the system, it
will get unexpected results in the sense cycle, fault and shut down.
Of note - my charger HAS to be setup with the brand and type of
battery connected to it for it to work properly. In my case it's been
told that it has Trojan T series flooded cells attached. If I connected
AGMs to it and didn't reprogram it, it would cook the AGMs. (And you
'program' it by shorting the output at certain times, a pretty scary
concept with a 30amp charger!)
If you want charging smarts AND multiple inputs you really need it
some how integrated - even if it consists of different input modules
plugged into the front end of a 'smart' charge controller.
| Reply via web post | Reply to sender | Reply to group | Start a New Topic | Messages in this topic (19) |
No comments:
Post a Comment