diy solar

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  • Post in thread: Is my new battery charger defective?

    The charger looks very respectable. Will Prowse uses it and I trust the guy. I bought CHINs batteries and the SCCs based on his reviews. These also look decently made.
  • Post in thread: Is my new battery charger defective?

    The battery will be above 99% at 13.7V. Based on the comments above, this is quite adequate and 14.4V is too high. The battery maker listed 13.8V, I am afraid to go higher.
  • Post in thread: Is my new battery charger defective?

    And here is how my story ends: I spent all morning configuring the DAQ device to log the battery voltage and the charging current (as a voltage drop across a calibrated shunt, on the negative terminal of the battery). When all was ready a loose wire from the "+" terminal accidentally touched the...
  • Post in thread: Is my new battery charger defective?

    Cal, but if the charger brought the battery to 14.4V on the float, don't you think that it would be too high? The battery spec calls for 13.8V. I think that 13.7V that the charger gives is not bad.
  • Post in thread: Is my new battery charger defective?

    Thank you, Samsonite801, for the info. I do not know how my new charger is configured to deliver charge. It goes into the float mode at 13.67V which suits me now that I reviewed the voltage curve that you supplied earlier. I was ready to return the charger to the seller because I expected that...
  • Post in thread: Is my new battery charger defective?

    I am planning to build a 400W solar system. I purchased an AIMS Power charger for 12/24V ($289, Will was recommending it) and a few CHINS 12V 100AH batteries. When I charged each battery, the charger reached 13.67V and went into the float stage at this voltage. The LiFePO4 battery should be...
  • Post in thread: Is my new battery charger defective?

    Thank you, chrisski. Yes, they are from China, like my batteries, the SCCs and everything else. But I think I should be satisfied with the charger, it does not spark, it brings the battery to a comfortable 13.7V and goes into the float stage. At this point I disconnect. I am planning to build...
  • Post in thread: Is my new battery charger defective?

    Very good comments, thank you. The LEDs on the charger indicate the status: the Bulk and the Float stage. The batteries settled at about 13.5V a few hours after the float stage disconnect and I am watching the self discharge, the drop was about 0.03V for two units and 0.05V for the third, in 22...
  • Post in thread: Is my new battery charger defective?

    Thank you, Samsonite 801 and sunshine, your comments were very helpful. It does look like the 13.7V is a reasonable level for the float stage. But the charger's manual listed 14.4V for this level and it bothered me. The Chins battery manual states: Charging Limit Voltage: 14.6V Over Voltage...
  • Post in thread: Is my new battery charger defective?

    Thank you, Don for your comment. I was worried about 0.7V discrepancy: the charger was "floating" at 13.67V but it's manual specified 14.4V as the float stage! I do not have the system assembled, just all components. I also have a bank of flooded lead acids which I keep at 13.5V. While I read...
  • Post in thread: Is my new battery charger defective?

    The BATTERY's manual - 13.8V, The charger's - 14.4V. But the charger held at 13.67V... What should it be, in your opinion? In Spain and in the US?
  • Post in thread: Is my new battery charger defective?

    Thanks, Cal. I did try the dips and the AGM yesterday, w/o any difference. But is there a problem? The battery wants 13.8V float (per its manual) and the charger floats the battery at 13.7V. Which is 99% charged. Not bad (?). There might be a misprint in the charger's manual where it lists...
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