Solar Power Combo-system can maximize the solar power utilization throughout the year. This system integrates and optimizes the power feed to the grid and battery charging. It has built-in intelligent system which allows cutting off the battery supply when reached to full charge level and 100% solar power will be fed to the in-house wiring for internal use (such as fridge, fan, TV, computer, washing machine, micro-wave etc) during day that reduces energy consumption from the grid. In winter season, no fan need to run and there is fewer loads shading compared to summer, so this smart system will charge the battery a little for back-up power and majority portion of the solar power will feed to the grid. As a result, this system maximizes the solar power utilization all over the year.