|
Post by Admin on Oct 29, 2019 18:17:25 GMT
This is a question about the latest version of the Rover 20A MPPT CC. The new CC has a port for the BT module, is it an RJ12. Also, if it is an RJ12, if you plugged in the RS232-USB cable, and ran the Solar Station Monitor program, would you be getting any data? In other words would it work. You should be able to get data. However, this would depend on the software monitoring station you're using. We have a version for our Commanders which utilized a RS485 port and the Rovers which utilize the RS232 communication but still work with bluetooth (RJ12). At the bottom of this page: www.renogy.com/learn/#tab_downloads
|
|
dave
Solar Newcomer
Posts: 1
|
Post by dave on Nov 3, 2019 16:22:56 GMT
It should be obvious that the load must be within the specs of the output terminals, however, there is also a possibility that the device runs within specs, but needs an initial charge current when starting up from a no power state. It is likely to saw this the first time you hooked up your batteries to the Rover....it sparked.
Electronic devices have capacitors on their input that have to get charged when power is applied. The bigger the load, the bigger the capacitors (generally speaking). There is a very large instantaneous surge current when the device is first connected. That is most likely causing the errors.
To avoid this issue, connect to the battery terminals first to pre-charge the capacitors, then connect to the load terminals. Better yet, if you are not planning to control the load (on/off) with the charge controller, just connect to the battery and leave it there. If you are trying to control the device's power with the charge controller, it has to be small enough initial surge to not trigger the errors. It is also possible to install a current limiting resistor in series with the device, but that is quite a waste of power while running, and requires a resistor that can handle the power. It is typically a very small ohmic value, (fraction of an ohm), and calculated for the specific devices to limit the surge...I don't recommend this option.
Another possibility is a 12V relay with the coil controlled by the charge controller, and the relay contacts providing power to the device. Now you are only loosing the coil power while the relay is on....so as always, more features, more power!
If you are trying to monitor the power use of the device with the charge controller, it is better to use a dedicated device for that function. As someone above said, the load terminals on the Rover are designed with lighting in mind.
|
|