LTC3330 / LTC3331 minimum voltage

Hi !

I'm prototyping an energy harvester (solar and  vibration) for low voltage applications and I thought about the LTC3330 / LTC3331  ICs.

My question is about the minum input voltage fro the ICs to work.

1) First we have the diode bridges wiht a voltage drop of 800mV

2) Then the energy transfer from in put cap to output cap starts when then Vin voltage is > UVLO  [4V] 

Adding 1 and 2  this is  4.8V

Is it true that there will be no energy harvest until the harvest voltage > 4.8V  ??

Thank you!

JC