|
Post by goingoffgrid on Jan 20, 2020 17:58:44 GMT
User Manual 11.pdf (165.05 KB)
I attached a page from the manual for easy reference. My questions;
1. How does the temp compensation formula work? My batt temp right now is 6°C, Can I get a real world example? (I guess I'm not a smart man, LOL)
2. In the right column last item, batt. discharge %, This appears to be non adjustable, Is this just an FYI value?
3. In the right column, Low volt reconnect (12.6V), is this the voltage when the MPPT charge phase starts ? and in the left column, Boost recon. charg. volt, Is that the voltage when it changes from MPPT to Boost?
I really like this interface....It is too bad Renogy kicked it to the curb. I don't believe any PC software is available for the new 60 or 100A Renogy CC (?)
A while back, I know this was beat to death , but some days my actual batt voltage (DVM measured) exactly matches the controller and other days its up to .3 V higher. Trust me, I do my best to get over it as long as I'm not in equalization mode ;-)
TIA Jim
|
|
|
Post by retrodaredevil on Jan 21, 2020 16:10:40 GMT
I'm not really sure how the temperature compensation works, but the Modbus document says the units for it is this: "5 mV/ °C/ 2V". I'm not really sure what it means. Maybe it will be useful to you. I think most of the rover's default settings are fine.
Also yeah, the monitor program isn't that great. If you have some technical knowledge, you could set up a custom monitor program. There are a few threads on that.
|
|
|
Post by bupkis on Jan 21, 2020 18:13:34 GMT
www.sunwize.com/tech-notes/battery-temperature-compensation/-.003 v / degree C / cell. a 12v batt is 6 cell, so now we have .003v x 6 per = .018v per degree c above/belove 25C 6C is 19 degrees below 25C, so -19 X -.018v = .342v, add .342v to your set pt voltages is 14.4 becomes 14.742v. in warmer temps this yields a reduction in voltage. 2. FYI, almost useless 3. low voltage reconnect has to do with using the load terminals Boost return voltage is what gets the CC out of float and back to charging fully (MPPT).
|
|
|
Post by goingoffgrid on Jan 21, 2020 19:50:23 GMT
www.sunwize.com/tech-notes/battery-temperature-compensation/-.003 v / degree C / cell. a 12v batt is 6 cell, so now we have .003v x 6 per = .018v per degree c above/belove 25C 6C is 19 degrees below 25C, so -19 X -.018v = .342v, add .342v to your set pt voltages is 14.4 becomes 14.742v. in warmer temps this yields a reduction in voltage. 2. FYI, almost useless 3. low voltage reconnect has to do with using the load terminals Boost return voltage is what gets the CC out of float and back to charging fully (MPPT). Thanks for the link and your explanation...I like your explanation better. Renogy's formula is -3mv/°C/2V .....Why do they use 2V, does that represent cell voltage? I guess the same reason they call it boost return voltage instead of MPPT return voltage. Thanks again for the response.
|
|
|
Post by bupkis on Jan 22, 2020 13:47:34 GMT
the adjustment is per '2v cell'.
|
|
|
Post by sirano on Feb 26, 2020 4:24:11 GMT
I attached a page from the manual for easy reference. My questions;
1. How does the temp compensation formula work? My batt temp right now is 6°C, Can I get a real world example? (I guess I'm not a smart man, LOL)
2. In the right column last item, batt. discharge %, This appears to be non adjustable, Is this just an FYI value?
3. In the right column, Low volt reconnect (12.6V), is this the voltage when the MPPT charge phase starts ? and in the left column, Boost recon. charg. volt, Is that the voltage when it changes from MPPT to Boost?
I really like this interface....It is too bad Renogy kicked it to the curb. I don't believe any PC software is available for the new 60 or 100A Renogy CC (?)
A while back, I know this was beat to death , but some days my actual batt voltage (DVM measured) exactly matches the controller and other days its up to .3 V higher. Trust me, I do my best to get over it as long as I'm not in equalization mode ;-)
TIA Jim
|
|
|
Post by sirano on Feb 26, 2020 4:32:12 GMT
hi there, I have a Rover 30Amp with a li batt 22.2v 232Amp, I cant setup the controller in user mode. I try 24 batt - user setting, but the readings stay at 17v. can't change the settings in de setting mode with my phone. the settings wont save. or I cant go higher than 17v only lower. What can be the problem.
note. if I change the voltage to 12v the settings are working.
|
|
|
Post by tattoo on Feb 26, 2020 13:15:24 GMT
hi there, I have a Rover 30Amp with a li batt 22.2v 232Amp, I cant setup the controller in user mode. I try 24 batt - user setting, but the readings stay at 17v. can't change the settings in de setting mode with my phone. the settings wont save. or I cant go higher than 17v only lower. What can be the problem. note. if I change the voltage to 12v the settings are working.
What is the voltage showing in your battery?
It sounds like the CC is reading the voltage in the battery.........
|
|
|
Post by bupkis on Feb 27, 2020 0:40:39 GMT
sirano, follow the manual directions, I believe that once you have 24v set (ON THE CONTROLLER NOT THE APP) that a setting of say boost of 14.0 is multiplied by 2 for 24v.
|
|
|
Post by sirano on Feb 27, 2020 2:58:58 GMT
sirano, follow the manual directions, I believe that once you have 24v set (ON THE CONTROLLER NOT THE APP) that a setting of say boost of 14.0 is multiplied by 2 for 24v. I have set to 24v as in the manual, but the CC see a low batt state (NO BARS IN THE BATT ICON) E3 error left below shows "24v" and Right "user"
|
|
|
Post by sirano on Feb 27, 2020 3:02:30 GMT
hi there, I have a Rover 30Amp with a li batt 22.2v 232Amp, I cant setup the controller in user mode. I try 24 batt - user setting, but the readings stay at 17v. can't change the settings in de setting mode with my phone. the settings wont save. or I cant go higher than 17v only lower. What can be the problem. note. if I change the voltage to 12v the settings are working.
What is the voltage showing in your battery?
It sounds like the CC is reading the voltage in the battery.........
|
|
|
Post by sirano on Feb 27, 2020 3:09:11 GMT
What is the voltage showing in your battery?
It sounds like the CC is reading the voltage in the battery...
the battery voltage is 23.6 volt . that's also display by the CC. and the batt icon have no bars. " Low voltage "
|
|
|
Post by bupkis on Feb 27, 2020 13:43:23 GMT
IIRC,E3 is for low volage @ the load terminals (cuts power to the loads) and E1 is too low for the controller to work. Since you do not have a '24v' battery you'll need to contract support to determine how to set the low voltage set pt for your battery. Not sure it can be done. It certainly could be an issue with the controller.
|
|
|
Post by sirano on Feb 27, 2020 17:23:01 GMT
IIRC,E3 is for low volage @ the load terminals (cuts power to the loads) and E1 is too low for the controller to work. Since you do not have a '24v' battery you'll need to contract support to determine how to set the low voltage set pt for your battery. Not sure it can be done. It certainly could be an issue with the controller. the batt see a low voltage because the charge setting can't set above 17 volt. in the manual the setting for USER are from 9-17v for boost. and for 24volt parameters are multiply by 2this is what I don't understand well. www.renogy.com/content/RNG-CTRL-RVR40/RVR203040-Manual.pdf
|
|
|
Post by retrodaredevil on Feb 27, 2020 18:14:29 GMT
If you have a 24 volt battery, setting it to 17V would correspond to 24V for a 24V battery and 9V would correspond to 18V for a 24 volt battery. Usually, the default values are fine and you won't need to change them. However, if your CC is detecting the wrong battery voltage, then that would be a problem. Also, there are a few bugs in the Rover's software that make it so you can't set every parameter. I found I couldn't set the values that needed a 9V-17V parameter, but maybe you'll have better luck.
|
|