Power inverter with voltage control circuitry

1. A system comprising:

an inverter configured to convert a direct current (DC) input to an alternating current (AC) output, the inverter comprising:

a DC/AC module configured to convert the DC input to the AC output,

first and second capacitors connected at an input of the DC/AC module, and

a housing configured to house the DC/AC module and the first and the second capacitors;

voltage control circuitry connected to a first terminal of the first capacitor, a first terminal of the second capacitor, and a midpoint terminal between a second terminal of the first capacitor and a second terminal of the second capacitor, wherein the voltage control circuitry is configured to increase a voltage at the input of the DC/AC module inside the housing of the inverter; and

a power source including output terminals connected respectively to the first terminal of the first capacitor and the midpoint terminal.

2. The system of claim 1 , wherein the voltage control circuitry is configured to convert a second DC input to a DC output across the first capacitor and the second capacitor.

3. The system of claim 1 , wherein the DC/AC module further comprises a plurality of output terminals.

4. The system of claim 3 , wherein the plurality of output terminals includes at least two AC phase output terminals.

5. The system of claim 3 , wherein the plurality of output terminals includes a neutral output terminal.

6. The system of claim 5 , wherein the neutral output terminal is connected to a ground potential.

7. The system of claim 6 , wherein the voltage control circuitry is further configured to control a voltage at the midpoint terminal relative to the neutral output terminal.

8. The system of claim 1 , wherein the power source is a photovoltaic power source.

9. The system of claim 1 , wherein the voltage control circuitry is configured to maintain a zero or positive voltage with respect to a ground potential at each of the output terminals of the power source.

10. The system of claim 1 , wherein the voltage control circuitry is configured to maintain a zero or negative voltage with respect to a ground potential at each of the output terminals of the power source.

11. The system of claim 1 , wherein the voltage control circuitry is configured to double the voltage at the input of the DC/AC module with respect to voltage output by the power source.

12. The system of claim 1 , wherein the system is configured to switch between a plurality of configuration modes.

13. The system of claim 12 , wherein the plurality of configuration modes include at least two of: an above ground potential voltage-boost configuration mode, a below ground potential voltage-boost configuration mode, and a non-voltage-boost configuration mode.

14. The system of claim 12 , further comprising one or more switches configured to switch the system between the plurality of configuration modes.

15. An apparatus comprising:

voltage control circuitry comprising:

a first output terminal configured to be connected to a first terminal of a first capacitor of a system power device,

a second output terminal configured to be connected to a first terminal of a second capacitor of the system power device, and

a third output terminal, between the first output terminal and the second output terminal, configured to be connected to a midpoint terminal between a second terminal of the first capacitor and a second terminal of the second capacitor, wherein the voltage control circuitry is configured to increase a voltage across the first capacitor and the second capacitor inside a housing of the system power device; and

one or more switches configured to switch the apparatus between a plurality of configuration modes, wherein the plurality of configuration modes comprise at least two of: an above ground potential voltage-boost configuration mode, a below ground potential voltage-boost configuration mode, and a non-voltage-boost configuration mode.

16. The apparatus of claim 15 , wherein the voltage control circuitry is configured to convert a direct current (DC) input to a DC output, and substantially double the voltage across the first capacitor and the second capacitor relative to a DC voltage across an exterior input of the system power device.

17. A method comprising:

connecting a first output terminal of a voltage control circuitry to a first terminal of a first capacitor of a system power device;

connecting a second output terminal of the voltage control circuitry to a first terminal of a second capacitor of the system power device;

connecting a third output terminal of the voltage control circuitry, between the first output terminal and the second output terminal, to a midpoint terminal between a second terminal of the first capacitor and a second terminal of the second capacitor;

connecting a first terminal of a power source to the first terminal of the first capacitor;

connecting a second terminal of the power source to the midpoint terminal; and increasing, using the voltage control circuitry, a voltage across the first capacitor and the second capacitor inside a housing of the system power device.

18. A system comprising:

an inverter configured to convert a direct current (DC) input to an alternating current (AC) output, the inverter comprising:

a DC/AC module configured to convert the DC input to the AC output,

first and second capacitors connected at an input of the DC/AC module, and

a housing configured to house the DC/AC module and the first and the second capacitors; and

voltage control circuitry connected to a first terminal of the first capacitor, a first terminal of the second capacitor, and a midpoint terminal between a second terminal of the first capacitor and a second terminal of the second capacitor;

wherein:

the voltage control circuitry is configured to increase a voltage at the input of the DC/AC module inside the housing of the inverter, and

the system is configured to switch between a plurality of configuration modes comprising at least two of: an above ground potential voltage-boost configuration mode, a below ground potential voltage-boost configuration mode, and a non-voltage-boost configuration mode.

19. The system of claim 18 , wherein the voltage control circuitry is further configured to control a voltage at the midpoint terminal relative to a neutral output terminal.

20. The system of claim 18 , further comprising one or more switches configured to switch the system between the plurality of configuration modes.