1. Solar Powered Charging Station Progress Report
9/20/11
Ben Hemp
Rob Wolf
Jahmai Turner

2. Solar Panels Monocrystalline Selected ~1.5kW-2kW in panels
Cost between Monocrystalline and Polycrystalline is similar
Monocrystalline is smaller in area for same power ratings
Monocrystalline slightly more efficient (~1%) with shading
~1.5kW-2kW in panels
Need to satisfy 120VAC, 60Hz, 15A receptacle requirements
Put panels in series to increase voltage
Must satisfy voltage input range to inverter (different requirements for micro and central inverters)

3. EnPhase Brand Microinverters
Pros
More flexibility. Inverters can be added/subtracted via a bus cord to make system larger or smaller.
If one inverter goes out, power will still be generated.
Capable of web-based system and smartphone apps.
Better performance under shading conditions.
Cons
Must be grid-tied.
Output of 208VAC or 240VAC. Would need a step-down transformer for 120VAC?

4. Net-metering Net-metering is possible in KY.
What to do with excess power generated since batteries are not being implemented this semester?
Contact LG&E to receive credit on energy returned to the grid?

5. Concerns Budget Grid -tied concerns for Enphase
Panel location and spacing