Je'Timmy 0 Posted September 8 Author Share Posted September 8 When 14.4v is reached, the controller stops charging, even though the battery is not charged. This happens very quickly when I drive the generator with my battery drill. Same would happen on a windy day. Quote Link to post Share on other sites
K4309 353 Posted September 8 Share Posted September 8 30 minutes ago, CarpeDiem said: That is against the laws of physics. Namely ohms law. This is your first misleading statement. It's physically impossible for a charging circuit to go straight to the absorption voltage regardless of its SoC. The key word here that you've used is "regardless". If the battery is "substantially" charged then the absorption voltage "could" be reached within a matter of minutes or maybe even seconds. However if the battery is "substantially" discharged then the absorption voltage will take substantially longer to reach, hours or even days. Your second misleading statement is that a normal absorption voltage would be 13.8v. This is misleading because you are implying that the bulk phase termination voltage and the absorption voltage are somehow different when infact they are not. I would need to understand what 'partially charged" meant and the chemistry to be able to assert if this is normal or not. Eg, assuming a 100ah AGM at a psoc of 99% then yes it would be perfectly normal for the absorption voltage to be reached in a few seconds. Assuming a 100Ah AGM at 70% SoC then this would be impossible unless the battery was short circuited internally and thus naffed. While both of these are partially charged batteries the behavior will be different depending on the actual psoc. Christ you can be argumentative. And splitting hairs. It is normal for a controller to call for 14.4v in the bulk phase. Weather or not the circuit achieves that voltage is entirely dependent on the battery. BUT THE CONTROLLER CALLS FOR 14.4v. In this thread we have no idea about the battery at all. That doesn't mean what I am saying is misleading. It means we have no idea about the battery. You can split as many hairs as you want, my point was simply that the OP thought it was a problem that the controller goes to 14.4v, as far as I can tell that is doing what it is supposed to do. There is so much missing context around what the actual question is, I can't really accept you telling me I'm being misleading in this context. Just trying to answer the guys question, not wanting to be exposed to a physics exam by your uptight and clearly superior self. Get over yourself. EPever MPPT controller programme settings for context bulk charge = 14.4v. ②Battery Voltage Control Parameters Below parameters are in 12V system at 25 ºC, please double the values in 24V system Battery type Voltage Sealed Gel Flooded User Over Voltage Disconnect Voltage 16.0V 16.0V 16.0V 9～17V Charging Limit Voltage 15.0V 15.0V 15.0V 9～17V Over Voltage Reconnect Voltage 15.0V 15.0V 15.0V 9～17V Equalize Charging Voltage 14.6V —— 14.8V 9～17V Boost Charging Voltage 14.4V 14.2V 14.6V 9～17V Float Charging Voltage 13.8V 13.8V 13.8V 9～17V Boost Reconnect Charging Voltage 13.2V 13.2V 13.2V 9～17V Low Voltage Reconnect Voltage 12.6V 12.6V 12.6V 9～17V Under Voltage Warning Reconnect Voltage 12.2V 12.2V 12.2V 9～17V Under Voltage Warning Voltage 12.0V 12.0V 12.0V 9～17V Low Voltage Disconnect Voltage 11.1V 11.1V 11.1V 9～17V Discharging Limit Voltage 10.6V 10.6V 10.6V 9～17V Equalize Duration 120 min —— 120 min 0～180 min Boost Duration 120 min 120 min 120 min 10～180 min Quote Link to post Share on other sites
CarpeDiem 510 Posted September 8 Share Posted September 8 7 minutes ago, Je'Timmy said: When 14.4v is reached, the controller stops charging, even though the battery is not charged. This happens very quickly when I drive the generator with my battery drill. Same would happen on a windy day. Sorry I need to underdstand what you mean when you say it "stops". How are you defining that it has stopped? What is the voltage on the charging circuit 1 second after it "stops"? Does the voltage gradually drop? If so, then what voltage does it eventually settle at? Quote Link to post Share on other sites
K4309 353 Posted September 8 Share Posted September 8 1 hour ago, CarpeDiem said: That is against the laws of physics. Namely ohms law. If it is against the laws of physics, how come the OP's charge controller is doing it? Quote Link to post Share on other sites
CarpeDiem 510 Posted September 8 Share Posted September 8 32 minutes ago, CarpeDiem said: Sorry I need to underdstand what you mean when you say it "stops". How are you defining that it has stopped? What is the voltage on the charging circuit 1 second after it "stops"? Does the voltage gradually drop? If so, then what voltage does it eventually settle at? In addition to the above, for context, would you please be able to share: what chemistry and capacity you are charging when the charger reaches 14.4v? how long does it take to reach 14.4v? Quote Link to post Share on other sites
Je'Timmy 0 Posted September 8 Author Share Posted September 8 When I say it stops charging, the controller switches to a state called “unload “. This is the same as “brake” mode. Maybe I can make a video tomorrow showing the voltages. Quote Link to post Share on other sites
mcp 34 Posted September 8 Share Posted September 8 23 hours ago, Je'Timmy said: , but I am using a battery that is far from fully charged. Or the battery you are using is in very poor health. 1 1 Quote Link to post Share on other sites
CarpeDiem 510 Posted September 8 Share Posted September 8 12 hours ago, Je'Timmy said: When I say it stops charging, the controller switches to a state called “unload “. This is the same as “brake” mode. Maybe I can make a video tomorrow showing the voltages. Looking at the documentation and at the product name. I suspect that the charge controller is providing a constant current charge phase only and is designed to stop supplying current when the voltage is reached. Eg the charge controller does not have a absorption or float phase. I suggest you run your battery down to 12v and then try the test again. If my suspicion is right the unit will ramp up over a longer period of time to 14.4v and then stop charging at which point the boost phase will be complete but the battery will not be fully charged. Quote Link to post Share on other sites
cornr 0 Posted September 17 Share Posted September 17 Hi I have an older silent wind with the previous controller. This is a pulse width controller set to 14.4 v. If the battery is charged it diverts to the overload resistors. So, when fully charged the voltage output is 14.4v and the unload light shows, ie it diverts the excess current to the resistors. I think no this is what your controller is trying to tell you. You could add a high draw load like an inverter running a reasonable load to the battery. If it's all working ok you should see the voltage drop a bit and the amp output from the regulator go up. Sorry if this is a bit jumbled, I'm just about to board a plane. Quote Link to post Share on other sites
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