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Registered Member #1822
Joined: Fri Nov 21 2008, 08:04PM
Location:
Posts: 300
Well, I blew up my SMP by putting a 60,000uF cap on it and I want to just put a lead acid battery on my next one. Is there anything special I need to do or should I just add a diode(prevent back feed), resistor and set the voltage to 14.5V(.7V over 13.8)? It will probably be a lawn tractor battery.
Registered Member #1525
Joined: Mon Jun 09 2008, 12:16AM
Location: America
Posts: 294
Current will not flow from the + terminal of your battery into the + terminal of the SMP unless the battery is at a higher voltage than the SMP output.
Registered Member #1525
Joined: Mon Jun 09 2008, 12:16AM
Location: America
Posts: 294
cduma wrote ...
What about when I turn the SMP off?
What's the worst that could happen? If the bus is already designed for whatever voltage, what could happen to it if the battery applied that voltage or less? I could see problems occurring if you connected a super high voltage battery to a PSU low voltage output, but if you're using the PSU to charge the battery, it follows that the battery's voltage is limited to whatever the PSU is designed to supply.
I've often had a big electrolytic capacitor across my PSU output, and nothing happened to the PSU when I turned it off.
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Battery Charging
