Power distribution networks for electrochromic devices

1. A system for monitoring and maintaining a power distribution network of optically switchable windows of a site, the system comprising:

a control panel monitor configured to cause:

determining a control panel voltage and current at a terminal of a control panel; sense circuitry configured to cause:

determining a first window controller voltage and current for a first window controller of a plurality of window controllers; and

one or more controllers configured to cause:

generating voltage network data based on a combination of the control panel voltage and current and the first window controller voltage and current,

determining an error condition in the power distribution network based on the voltage network data, and

determining a corrective action to address the error condition, wherein the corrective action comprises increasing a first window controller power for the first window controller while decreasing a second window controller power for a second window controller in association with causing a first switchable optical window coupled with the first window controller to have a first tint state.

2. The system of claim 1 , the sense circuitry further configured to cause:

determining an additional error condition in the power distribution network based on the voltage network data, and

determining an additional corrective action to address the additional error condition, wherein the additional corrective action comprises decreasing a first voltage provided to at least one window controller of the plurality of window controllers and increasing an amount of time during which the first voltage is provided to the at least one window controller of the plurality of window controllers.

3. The system of claim 1 , the sense circuitry further configured to cause:

determining an additional error condition in the power distribution network based on the voltage network data, and

determining an additional corrective action to address the additional error condition, wherein the additional corrective action comprises remotely resetting a circuit breaker of the control panel.

4. The system of claim 1 , wherein the corrective action further comprises increasing the second window controller power in association with causing a second switchable optical window coupled with the second window controller to have a second tint state.

5. The system of claim 4 , wherein the second tint state is different from the first tint state.

6. The system of claim 4 , wherein the second tint state is the same as the first tint state.

7. The system of claim 1 , the sense circuitry further configured to cause:

determining a second window controller voltage and current for the second window controller of the plurality of window controllers,

wherein the voltage network data is further based on the second window controller voltage and current.

8. The system of claim 1 , wherein the error condition indicates a control panel power approaching a power output limit.

9. The system of claim 1 , wherein determining the error condition comprises comparing the voltage network data to an expected voltage difference between nodes of the power distribution network.

10. The system of claim 1 , wherein determining the error condition comprises comparing first fingerprints of devices of the power distribution network to second fingerprints of the devices of the power distribution network.

11. The system of claim 1 , the system further comprising:

one or more power supplies electrically connected with a main power supply for the site, and

one or more ports electrically connected with the one or more power supplies.

12. The system of claim 11 , the system further comprising:

one or more trunk lines electrically connected to the one or more ports, and

a plurality of drop lines electrically connected between the one or more trunk lines and one or more of the optically switchable windows.

13. The system of claim 12 , the system further comprising:

a plurality of connectors electrically connected between the plurality of drop lines and the one or more trunk lines.

14. A method of monitoring and maintaining a power distribution network of optically switchable windows of a site, the method comprising:

determining a control panel voltage at a terminal of a control panel;

determining a first window controller voltage for a first window controller of a plurality of window controllers;

generating voltage network data based on a combination of the control panel voltage and the first window controller voltage;

determining, by control logic, an error condition in the power distribution network based on the voltage network data; and

determining, by the control logic, a corrective action to address the error condition, wherein the corrective action comprises increasing a first window controller power for the first window controller while decreasing a second window controller power for a second window controller in association with causing a first switchable optical window coupled with the first window controller to have a first tint state.

15. The method of claim 14 , further comprising:

determining an additional error condition in the power distribution network based on the voltage network data, and

determining an additional corrective action to address the additional error condition, wherein the additional corrective action comprises decreasing a first voltage provided to the first at least one window controller of the plurality of window controllers and increasing an amount of time during which the first voltage is provided to the at least one window controller of the plurality of window controllers.

16. The method of claim 14 , further comprising:

determining an additional error condition in the power distribution network based on the voltage network data, and

determining an additional corrective action to address the additional error condition, wherein the additional corrective action comprises remotely resetting a circuit breaker of the control panel.

17. The method of claim 14 , wherein the corrective action further comprises increasing the second window controller power in association with causing a second switchable optical window coupled with the second window controller to have a second tint state.

18. The method of claim 17 , wherein the second tint state is different from the first tint state.

19. The method of claim 17 , wherein the second tint state is the same as the first tint state.

20. The method of claim 14 , further comprising:

determining a second window controller voltage for a second window controller of the plurality of window controllers,

wherein the voltage network data is further based on the second window controller voltage.

21. The method of claim 14 , wherein the error condition indicates a control panel power approaching a power output limit.

22. The method of claim 14 , wherein determining the error condition comprises comparing the voltage network data to an expected voltage difference between nodes of the power distribution network.

23. The method of claim 14 , wherein determining the error condition comprises comparing first fingerprints of devices of the power distribution network, the fingerprints representing voltage or current response, to second fingerprints of the devices of the power distribution network.

24. A computer program product comprising computer-readable program code capable of being executed by one or more processors when retrieved from a non-transitory computer-readable medium, the program code comprising instructions configured to cause:

determining a control panel voltage at a terminal of a control panel;

determining a first window controller voltage for a first window controller of a plurality of window controllers;

generating voltage network data based on a combination of the control panel voltage and the first window controller voltage;

determining an error condition in a power distribution network based on the voltage network data, and

determining a corrective action to address the error condition, wherein the corrective action comprises increasing a first window controller power for the first window controller while decreasing a second window controller power for a second window controller in association with causing a first switchable optical window coupled with the first window controller to have a first tint state.

25. The computer program product of claim 24 , wherein determining the error condition comprises comparing the voltage network data to an expected voltage difference between nodes of the power distribution network.

26. The computer program product of claim 24 , wherein determining the error condition comprises comparing first fingerprints of devices of the power distribution network, the fingerprints representing voltage or current response, to second fingerprints of the devices of the power distribution network.