30% of the total cost of each system, there is no maximum. If the federal tax credit exceeds tax liability, the excess amount may be carried forward to the succeeding taxable year. Remember, One Planet Solar only specializes in renewable energy products. Therefore, you can rest assured your in good hands. Any equipment attached to an owner-occupied residential building or swimming pool as part of a solar energy system is considered personal property that is exempt from ad valorem taxation. The value of a solar energy system will not be included in the assessment of such buildings or swimming pools.