I'm new to battery powered bikes , don't have a Ribelle yet, seen a ton of videos on charging that show how to connect to bike, But what is at the other end of cable? Does bike come with some sort of AC wall plug, Is there a home Fast charge unit that can be purchased? I guess the Energica's have a CCS1 connector. I have seen chargers on ebay for around 400 USD that have J1772 and CCS1, not sure if they will work. What is Level 1, 2 , 3 charging.
Any insite would be appreciated
There is some really good info on charging in some of the Tesla forums. TMC (Tesla motor club) is a great place to start. It will really help you to understand the limitations of lithium-ion (Li-on) batteries. There are lots of things to learn about them to do what you can to reduce degradation which results in reduced range. I don't see really anything discussed here about it.
A good rule of thumb is to not use L3 (DC) charging any more than you have too. It puts a lot of stress on the batteries. It is one of the reasons that I am considering an Energica is because they offer this and Zero doesn't. It really can help with trips.
It also looks like Energica only uses air cooling for their batteries. High temps are bad for li-ion batteries. Shallow discharge cycles are better for Li-ion than deep discharge cycles. There is a lot to learn if you want to help your battery pack to survive as long as it can.
Another good source of info is batteryuniversity.com. Some good reading here specifically. https://batteryuniversity.com/article/bu-808-how-to-prolong-lithium-based-batteries
I do a lot more with li-po and li-ion than just ride motorcycles, and it always makes me wonder where people making these claims get their data from without knowing what cells have been used to construct the packs on our bikes. Without proper data, statements that a certain charge current induces 'more stress' are based on nothing.
Quick math on a napkin, the Ribelle's 21.5kWh pack has a nominal voltage of 296V and the manufacturer stated it's a 2-string pack of 81 cells per string, so 81s2p. The pack is 72Ah by dividing the kWh by the V. Since practically all cells used in automotive have a charge rate of at least 1C, these packs can be charged with at least 72A without degradation because of fast charging.
The Battery University link you referred to has this line as conclusion at the bottom:
Energy Cells, which most consumer products have, should be charged at 1C or less. Avoid so-called ultra-fast chargers that claim to fully charge Li-ion in less than one hour.
This is exactly what Energica's do when DC charging: charge at 1C.
