How to change alternating current to direct current? How to do it??

Hello
I have energy storage charged from PV panels.
But winter is going and they produce poorly and electricity is needed
I don't have mains power, only a generator.
What I would like to obtain:
As the inverter doesn't want to charge my storage from the genset - I don't know why; it shows 50Hz with pennies and a voltage of 240V.
I decided to 'straighten' this current and connect it as DC instead of PV modules.
I used a full bridge, followed by a capacitor from the description to 400 V and plugged this in instead of the panels, and it doesn't work as I wanted.
I should add that the genset is 3-phase and I would like to load it evenly (use all phases) and, therefore, get 3 times the charging current.
Does this have a chance of working?
So far nothing has exploded apart from the capacitor, but this is probably due to the fact that I've connected temporarily 'dry', with no load/power consumption.
It charges poorly, the genset works strangely on this solution and I don't know if it's being overloaded by my invention or if something is "fighting" with itself.
I hope someone has understood me and is able to give me a hint.
Best regards, Czarek

What voltage does this energy storage have?

48 V, lifepo4 320 Ah.
6.2 kW inverter.

@Cezar0823 leave it alone or you'll be mollifying the shed and it'll only be a problem. You are making basic mistakes (you want to charge with too much voltage).
As for the almost academic discussion, no one has mentioned the choke and it filters the current (amperage) and the capacitor filters the voltage.

In fact, the situation was a bit dangerous, fortunately it ended with a boiled capacitor.
And it was supposed to be so beautiful and simple.
The situation was described to me by an Elektroda bot and no knowledge was spared.
https://www.elektroda.pl/rtvforum/topic4152289.html

Added after 2 [minutes]:

Thanks for the information.
I'm back on the ground
and looking for proven solutions for charging energy storage without access to the mains.
Regards

@Cezar0823 After all, you have a generator. Use a suitable charger adapted to your battery bank. Except that, for me, this is heresy. And why, you can guess.

Instead of guessing I got the info from the bot; hopefully factually correct as it explains a lot.
I tested the generator mode before trying with the rectifier and it didn't turn on; it saw the generator voltage and frequency, even turned on Bypass mode, but didn't charge.
But I got an answer to that from the bot too, as to how to solve - at least try - safely.
I will test it at the earliest opportunity.
When you don't have enough experience and knowledge, sometimes you can mess something up
For me, enough knowledge already.
Thanks to all who have contributed.
Regards