static for me, a £30 delivery pump will pump 500litres to you van tank/barrells in less than 10 mins.
You can go on producing pure all day long when your out to work, plus you can use you van at any time
Its a no brainer.
Also because you dont need to produce water that quickly, you only need a 300gpd ro from say pure freedom for around £150, and a ibc tank for about 30 to 50 quid second hand