I have two Battle Born batteries hooked in series for 24v. I'd like to keep the Blue Smart IP67 24/12 hooked up to the batteries when I'm not charging them, and also unhook the charger from AC power. I only hook up the charger when solar doesn't top up the batteries at the end of the day. I'm afraid the batteries might damage the charger by back feeding it when it's not powered up.
No problem, this chargers are also used in campers etc. where they are almost never disconnected.
Thank you for the info. I've been disconnecting and reconnecting the charger each day, and after three months, it's getting irritating. I do know that when I reconnect the charger, I use a resistor to charge the capacitors in the charger or else I get a spark. That's why I was worried about keeping the charger hooked up all the time. The manual on the IP65, If I remember correctly, states that it can be left hooked up, but nothing about this in the IP67 manual.
How much current does the charger draw from the batteries then? If its a few mA, your batteries might drain, if you leave it like this for a long time (e.g. winter)
The charger is used to top up my full time solar system. I have to top up the batteries most each day because of the neighbor's trees. I'm just tired of having to unhook and re-hook the charger each day. The charger's draw is negligible.
