Combine voltage divider with shunt for solar monitor
No, you can't - the current shunt has to be in line with the current flow and very low value, while the voltage divider is high resistance and out of the main current path.

There are a number of devices like the very neat INA226 that support both current and voltage monitoring in a single device, however. The INA226 has an I2C interface, is extremely accurate, and will even calculate power usage for you.