There are many manufacturers of 12 volt control panels such as Zig, CBE, Sargent and Bonus / Plug-in Systems to name just a small selection. All have different features and come in different styles, so it’s a matter of personal choice really. One thing to consider when purchasing your chosen unit is it must have a battery charge status display, a light switch, water pump switch and, if you’re going to install an extra appliance you'll need an auxiliary switch.