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System Configuration
2–32 976-0043-01-02
Off-Grid Applications
The Sine Wave Plus can be used as a primary source of AC power to
support off-grid, stand-alone systems where no utility power is available.
Sine Wave Plus applications in an off-grid situation include:
• renewable energy systems (with or without generator backup), and
• generator-only systems
• inverter only systems (charger in the inverter/charger is not used, but
batteries are maintained by an external DC charger).
Renewable Energy Systems with/without Generator Backup
In this configuration, the main power is generated by renewable energy
sources, such as solar, wind, micro-hydro or some other form of a
regulated DC charging source, and is stored in a battery bank. The
Sine
Wave Plus will operate all AC loads from the power stored in this battery
bank.
In the event that renewable energy sources are insufficient to power the
required loads or keep the batteries charged, a generator can be used to
supplement the system.
Single-Inverter Configurations (120 Vac)
If only 120 Vac output is required from the system, a single inverter is
adequate to provide the required power, depending on the wattage
(output) requirements of the total system.
Single-Inverter Configurations (120/240 Vac)
If 240 Vac output is required from the system and the total of the loads
does not exceed the wattage output of the inverter, a step-up
autotransformer can be added to the output of the system to increase the
voltage output.
See Appendix F, “Multi-wire Branch Circuit Wiring” , for more
information on using single inverters with multi-wire branch circuits.
See Figure 2-17 for an example of both configurations (120 Vac and
240 Vac output) with all optional equipment. Disregard any part of this
illustration that does not apply to the components being installed. For
purposes of this publication, the main breaker (utility) panel is referred to
as the “inverter AC distribution panel” or simply “inverter panel”.