This type of system does not use batteries. Energy produced by the PV array goes directly to the load. The modules can only power one load, like a water pump or a vent fan. This type of system only operates when sunshine is present and needs no regulating components. A device called a Linear Current Booster (LCB) is often used to improve the performance of the motor load. It helps start motors, and sustains their operation during varying sunlight intensities. PV-Direct systems are ideal for remote unattended locations. Protection against pumps running dry and overheating motors may be required.
- Stand-Alone Battery-Based Systems
- Small DC (or AC) System
- Combination DC-AC System
- AC-Only System
- PV-Gas Generator Hybrid System
- PV-Grid Connect System
- PV-Direct System
- Planning Your Own System
- How much electrical energy will I need?
- What type of electrical energy and what voltage should I choose?
- How many solar panels (PV modules) will I need?
- Where should the solar panels be placed?
- What kind of module mount: stationary or tracking?
- How about batteries?
- Will I be adding this system to new construction or an existing structure?
- Plan for the future