At the moment I'm set up sufficiently, I think, to run a night or 2 at a dark site without mains supply with deep cycle batteries etc.
Trouble is, I'm not really set up to run fully on mains supply and still need to use a 12V battery for some gear. I'm looking to get a mains to 12V regulated power supply so if there's mains available I can fully run off that.
Question 1: Looking at Jaycar there's a selection of 13.8V DC regulated power supplies. I understand that 12V batteries aren't always 12V, when fully charged they might be 13.8V then drop to something like 11V or whatever.
So I assume one of these 13.8V supplies is the one to get?
Question 2: What's the difference between this 13.8V 20A unit and this 13.8V 20A unit, aside from $100 or so? Would the cheaper, black one be acceptable? Not sure of the definitions or difference between "bench" and "lab" supplies. Maybe "lab" is better quality but too much for me?
Question 3: How much is enough? 20A seems like overkill for HEQ5Pro mount (couple of Amps max?), and some dew heaters (few Amps?).
Maybe this 12A one would be enough?
Question 4: Got any better/cheaper ideas?