Either supply will run the 0720 DC charger, but the 1st won't run the charger at full power. Chargers have some inefficiency or loss (takes something to 'run' the charger and energy lost as heat). Generally its considered that you need 20% more wattage than the charger is rated for, so the 250watt charger would need 300watts to run at full power delivering 250watts.

Your 1st link wouldn't, but the 2nd linked supply would run the charger at its full capacity.


You can use up a lot of power with higher than 1C rate charging. If your 4S allows 5C charging, there are other chargers that can enable that. As mentioned above, the 0720 DC charger would limit you to right at 3C. Hyperion is re-vamping their lineup supposedly sometime in July with more charger output power in a few new models. There will be a 1420 DC powered charger with 500watt output iirc.