Charging battery with Honda 2000

BlueBoy wrote:
Will my Honda 2000 charge the battery as fast on eco as it will fill throttle?

You said 'the battery', which implies you have a single 12V battery. I assume either a group 24 or 27. The direct answer is YES, you can leave it on eco.

What others are referring to is depending on the converter you use to charge the battery or how you are connecting the generator to the battery, there may be a quicker, better, or more efficient way to do it. I use a 30A Megawatt power supply similar to what Mex mentioned. You can buy one for $50 +shipping. And there is no need to go down to Mexico to get your fuel.