It depends...
Charger efficiency is one factor you need to consider. If you are using an AC powered charger, you'd need to look at the specific unit, but expect something less than 90%, probably a lot less.
Battery charging can also vary. Depends on a number of factors. How quickly it's charged, temperature, etc.
You'd also need to have some specific point as to when the battery is "fully charged". Since battery capacity reduces over time, this will change.
In basic terms, if you tracked how much energy you remove from a battery, you would need to put that much back in to bring the battery back to the same level. You'd need to figure in the charging efficiency, resistance in the wire, connections, etc.
Low end batteries won't have much information out there. If you are looking at larger battery systems, like those used in telecommunication plants, very large UPS systems, etc. you can find some information, but due to the variables, you are not going to find the specific information you seek spelled out. You'll need to sit down with a good meter and do some calculations and then wing the rest.
Doing the following will reduce some of the losses:
1. You need to design your power cabling to reduce voltage drop. There are formulas that will tell you what size conductor to use to achieve a certain level of voltage drop over a specific circuit length. Voltage drop is the resistance in the wire converting the charge current into heat.
2. All your connections need to be properly done. No cheap wire, no cheap crimp on connectors. Crimp connections should be done with the proper tool. Not the $15 hardware store "smasher" crimpers. You need to have the specific full cycle crimp tools designed for the wire gauge and crimp you are using.
Soldering the connections help. All connections need to be clean and protected. Stainless steel hardware, no-ox type connection grease, etc.
3. Temperature control. Batteries work better when kept at a constant temperature. Manufacturer will usually recommend something in the 70ºF range. Increasing or decreasing this impacts battery performance, sometimes considerably.
4. Since battery performance decreases with time, you'll need to look at the entire expected life span of the system. Figure in some extra capacity to cover yourself down the road.
5. Charging needs to be done at a specific rate, usually battery ampere/hour capacity over X number of hours. Manufacturer info will give you the recommended charge rates. It'll be usually shown as C/20. C = capacity, 20 will be hours. You may find ratings like C/8 C/10, etc. Charging a battery at a faster rate can damage the battery by overheating it. The heat comes from wasted energy. Wasted energy is your charging current just getting converted to heat.
6. Charge voltage needs to be carefully controlled, usually down to the tenths of a volt. Charge voltage needs to be adjusted based on battery temperature. This is usually referred to as "temperature compensation". You'll find this on large telecom grade DC power plants used in central offices or cell sites. Rare to find it on amateur/hobby grade power supplies/chargers.
This is a pretty big subject. Happy to help out as I can, but I'd need a lot of specifics. Anything you can provide will help.