|
|
Post by numnutz on Feb 17, 2020 17:20:12 GMT
Bear with me, solar noob here.
Does the Renogy Battery Monitor provide any more or better information than I can get from my Rover 40A MPPT controller and the BT-1? I ordered one hoping to get a reliable state of charge on my 6 volt batteries. Since ordering one I read that it reports state of charge simply from battery voltage. That is not an exact measurement of SOC unless the batteries have been "at rest" for a couple of hours is it? If I can't get accurate readings what is the purpose of using a shunt?
Also, according to the directions, the monitor needs to be calibrated by discharging batteries to 0% (don't know why anyone would do that and risk ruining your batteries) or fully charging to 100%. So, when the controller goes into float mode charging are the batteries at 100% charge for monitor calibration?
|
|
|
|
Post by tattoo on Feb 17, 2020 18:35:28 GMT
Bear with me, solar noob here.
Does the Renogy Battery Monitor provide any more or better information than I can get from my Rover 40A MPPT controller and the BT-1? I ordered one hoping to get a reliable state of charge on my 6 volt batteries. Since ordering one I read that it reports state of charge simply from battery voltage. That is not an exact measurement of SOC unless the batteries have been "at rest" for a couple of hours is it? If I can't get accurate readings what is the purpose of using a shunt?
Also, according to the directions, the monitor needs to be calibrated by discharging batteries to 0% (don't know why anyone would do that and risk ruining your batteries) or fully charging to 100%. So, when the controller goes into float mode charging are the batteries at 100% charge for monitor calibration?
SOC % on the Charge Controller means NOTHING so there is no need to even look at it............
All that matters is how much voltage is in your battery.....................
Here is a chart to go by.....  |
|
|
|
Post by tattoo on Feb 17, 2020 18:37:58 GMT
By the way are you using the 6v battery at 12v or are they still 6v?
|
|
|
|
Post by bupkis on Feb 17, 2020 18:41:59 GMT
So, when the controller goes into float mode charging are the batteries at 100% charge for monitor calibration?
That is the concept. Depending on how your battery is used it may need more than 2 hr boost for the current to taper to nil @ 14.?v (100%). Some capacity may be tied up and may need a good equalization charge to get to 100%. Flooded batteries can usually have their electrolyte measured with an hydrometer to determine SoC. |
|
|
|
Post by numnutz on Feb 17, 2020 19:02:10 GMT
I am using two 6 volt in series to make 12 volt
|
|
|
|
Post by tattoo on Feb 17, 2020 23:12:49 GMT
I am using two 6 volt in series to make 12 volt That's what I thought, but you never know so that's why I asked................
I'm doing the same thing with 6, 6v batteries.............
|
|
cjackg
Solar Newcomer
Posts: 17
|
Post by cjackg on Mar 2, 2020 0:49:03 GMT
Bear with me, solar noob here.
Does the Renogy Battery Monitor provide any more or better information than I can get from my Rover 40A MPPT controller and the BT-1? I ordered one hoping to get a reliable state of charge on my 6 volt batteries. Since ordering one I read that it reports state of charge simply from battery voltage. That is not an exact measurement of SOC unless the batteries have been "at rest" for a couple of hours is it? If I can't get accurate readings what is the purpose of using a shunt?
Also, according to the directions, the monitor needs to be calibrated by discharging batteries to 0% (don't know why anyone would do that and risk ruining your batteries) or fully charging to 100%. So, when the controller goes into float mode charging are the batteries at 100% charge for monitor calibration?
I have been using the Renogy 500 battery Monitor for a while with a bank of 4 Renogy 100ah AGMs and it uses the shunt for a/h measurements and certainly seems a lot more accurate than the per cent display on the charge controllers. I like that the monitor shows me the amp hr charge status at the battery which I can then compare to the PV input charge status on the controller. I highly recommend this product and would not be without it. Attachments:
|
|
