Chalit versus birth chart - what's the difference?

A chalit chart shows planets in houses (bhava). Planets occupy signs, not houses. If it's assumed that one sign completely occupies one house of 30 degrees, houses are alloted to planets in usual way, which we call the main birth chart or rashi chart or D1 chart.

What is chalit chart and what does it show?

How to interpret chalit chart for predictions

Usually, a normal birth chart is created by taking the start of first house right at the beginning of rising sign or lagna rashi.

This keeps the rising ascendant degree exactly at the same location as it occurs in the rising lagna rashi. This is the usual birth chart.

If however you take the rising ascendant as starting degree of the 1st house, then counting 30 degrees from that point will allocate planets to probably different houses than where they are paced in the birth or main chart. This kind of allocation of planets to houses is called chalit chart (also called bhava chalit chart because is shows planets in bhavas).

Which one to use - rashi chart or chalit chart?

So the usual main chart that we see everywhere is called rashi chart and shows planets in rashis (signs) whereas the other type that we discussed above is chalit chart which shows planets in houses. 

What to interpret from chalit chart?

Chalit chart shows how the results will eventually turn out. For example, if a planet occupies 12th house in rashi (main) chart but occupies 11th house in chalit chart, it indicates losses as general thumb rule but then eventually this loss would turn into gains at some later point.

If opposite is the case i.e. a planet occupies 11th house in rashi (birth) chart but goes to 12th in chalit chart, then general tangible gains acquired during that planet's period will eventually result in loss at a later point.

Type of chalit charts

To confuse the matters further, the above way to create chalit chart where its assumed that one sign occupies 30 degrees is called Shripati method.

There is another method which uses western Placidus method to allocate degrees to each sign by calculating the longitude/latitude of the place which is used by KP method and it's variants. I personally think this chalit chart makes more practical sense instead of Shripati method.

When to see which chart ?

To begin with, just focus on main chart and its enough to just understand the concept of navamsa chart.

Just read the main chart and check the modified strength of the planets in navamsa chart. You do not need to use chalit chart at the beginning as it's a little too much to handle multiple charts for analysis. That's the way to go atleast first 6-10 months.