Raspi model A and B current consumption compared:These running NRS 0.8.1x and ideling most of time @250Mhz, only some peaks to 900Mhz. Model A is Hallmarked!
All RasPI's have a USB Wlan adaptor connected!
My modified model A that runs 100% from solar:
(powered with 3.3V through external step-up/step-down voltage regulator, used for Li-ion battery power)

Model A standard:

Model B standard:

As you can see, model B is much more power hungry as model A and they can also be optimized with an external voltage regulator.
The modified model A, with my battery setup, runs about 125 hours without sun (~7 days with sunlight included) and is 100% recharged in ~38 sunlight hours (~5 days @1000mA). While sun is charging the batteries, the RasPI is completely powered by the solar panel (If we have enough sunlight)!
Next measurement is a ODROID-u3, ODROID-xu and a cubietruck.
I hope this information is helpful for someone.
Greets,
eb