I have purchased one of these dc-dc converters.
http://cgi.ebay.co.uk/Isolated-DC-DC-CO ... ltDomain_0
It gets connected to the pack and is enabled by connecting an extra wire to the + side of the pack. This wire doesn't seem to click a relay or anything so I am assuming that the converter stays always powered when switched off........like leaving your telly on standby. I'm not sure I like this idea (it's made in China!) and was thinking of connecting the two + wires together permanently and switching it on using a relay and series precharge resistor from the ignition switch then, after a time delay having the BMS bypass the precharge resistor with another relay. This is because I am assuming the dc-dc will have fairly large capacitors on the pack side and would otherwise wear out the relay.
Any thoughts, am I just being silly?
![Confused :?](./images/smilies/icon_confused.gif)
Derek