Filling tank with pure water question

So right now I have been filling a tank in the back of my vehicle full of pure water using the xero pure. Works fine but takes forever… like 30 mins for 10 gallons. I am using a 55psi 3 gpm booster pump from a rain water reservoir. Would getting a larger pump make it any faster because I know the xero pure is regulated at the exit point… in the beginning if i would have known i was going this route i would have got a commercial water purifier vs mobile one.

And thoughts/ideas/suggestions would be greatly appreciated

You can add a true booster pump and increase the water production. Here are a few to consider in our store.
Please call me direct if you have any questions 865-310-0728