- erzeugt nicht erklärliche Spannungsspitzen im Bordnetz bei Solabetrieb
Moinsen,
Nochmal dazu, da ja Erfahrungen zum Ctek dual gefragt waren. Nach dem Umbau auf Victron/Votronic habe ich keine Fehler mehr im SG "elektrische Zentralelektronik" die auf Überspannung hindeuten. Hatte den Fehler mit dem Kundenservice diskutiert und folgende Erklärung erhalten.
FRAGE:
Dear Ctek-Team, I am running a D250S Dual in my van and for 4 years everything went fine. A few month ago I found an error in the fault memory of my van that says something like "overvoltage". I tried to figure it out, change the generator of the car etc. The error stayed. Finally I disconnected the solar panel from the device, which is making up to 21,5V, and the error disappered. It seems that the D250S is delivering a higher voltage than 14,4V from the panel to the electrical System of the car temporarely. - Do you got any informations about that kind of problem? - Last option would be an internal defect of the device. What do you think? - Does the device got an overvoltage protection in case the voltage of the panel raises above that 23V maximal input? Thank you for your help! Best regards!
ANTWORT:
Hi Fabian. The solar input can handle voltage up to 23V on that input. However, this is converted to the charging algorithm with the voltage output suiting the battery being charged. The D250S-Dual has a temperature compensation function. The 14,4V output is at 25C. this is adjusted by 23mV p. C as battery's need higher end voltage in colder environments. Example. at 20C the end voltage is 14,4V + (5 x. 0,023V) = 14,515V This could be the explanation of your Observation.
Wie plausibel das ist: keine Ahnung. Würde aber bedeuten, dass durch diese Temperatursteuerung Probleme mit Überspannung vorprogrammiert wären. Allerdings weiß ich auch nicht, welche Grenzwerte das SG nutzt.
VG Fabian