Update 1:

Now I have energy harvester schematic configured in boost mode. The main purpose - energy harvester testing. Stil I don't sure is SPV1050 right choise. So need to create test board and figure it out. Only problem - very fine pitch (0.4mm) so I need to use 0.15\0.15mm traces PBC (can't be done DIY). And shipping from china would take a lot of time.

Fast shipping costs 3 times more than boards itself ;(

In schematic there are possible to use one of four different inductors, four 10uF ceramic 0805 or one 47uF polarised cap, one of two different litium rechargable batteries or up to six 5.5V 0.22F supercaps. Some kind of flexibility.

Next step: measure max power point to evaluate resistor values for harvester. Not complex but require time to measure VACs.