Recent content by Mercracing

During the non air conditioning seasons (provided we get decent sun) my batteries are discharged (per the closed loop BMS) to about 71-73% when the sun starts charging us up. On a normal day the batteries are charged by noon or shortly after and we start selling to the grid. In your opinion how...

Lt.Dan, What type of inverter do you have? My 15K does not appear to have the ability to set different stages to the charging process (I have float, absorption, and equalization- which Sol-ark said not to use on LFP). Ultimately what I would like is to figure out how to get the inverter and the...

DIYrich Catching the batteries during a time frame like you described the cells are not as well balanced. These numbers are from 2/14 @ 5:09 p.m. Pack 1- high- C5- 3558 mV Low- C7- 3348 mV Pack 2- high- C5- 3668 mV Low- C10- 3501 mV Pack 3- high- C13- 3656 mV...

Does holding the batteries that high pose any danger to the cells (I am asking out of ignorance)? When the communications were on the bank would come up to 57.1-57.2V and then ramp down to 56.4V and then back up to 56.9V throughout the afternoon. I'm still kind of at a loss as to how the...

Sorry. I should have been more clear. The cell voltages I listed were during discharge. The cells on #4 were highest 3558 mV and 3523 mV lowest. While #1's (highest SOC) highest cell @ 3640 mV and lowest @ 3377 mV.

To that point. Last night my #3 was showing a high cell reading at 3320mV and lowest cell at 3312 mV (@ 84.13% SOC at reading and ended the charging cycle @ 98.55%) while #4 (the pack reaching the lowest SOC @ 79.65% at reading and ended the charge cycle 90.76 % was showing high @ 3317 mV and...

What constitutes being "way out of balance " and when is the correct time to look at cells to determine this? I have been taking readings of all the different battery info, but I don't really know what they mean.

I had the BMS calling the shots until this afternoon when I switched the system to voltage. At that time the batteries had stopped taking a bulk charge. I have the Sol-ark set to charge at 57.1V (the log in the inverter shows the system touched 57.1V and quickly dropped to float voltage) and...

I have now tried your suggestions. So far no changes have occurred. Anybody got anything else?

I have eight SOK 48V batteries (two racks of four batteries 1-4 and 5-8 with one set of cables per bank to the inverter. All cables are identicalin length) connected with communications to Sol-ark 15K. The batteries have been in service six months at this point. Starting 02/07 the report SOC on...

The Honda eu7000is has the ability to use a twobwire start kit which will allow it to be turned on and off by the inverter.

Do you have any advice on who's kit to use? When using a natural gas kit can the generator be started remotely by Sol-ark? The generator I have only has something like four hours on it so I wouldn't mind using it. My other concern with the Honda is it only being 5500 running watts. This wouldn't...

I have a Sol-ark 15k inverter and eight SOK batteries. I would like to add a generator to the system. I have a Honda Eu700is (probably just laege enough) but, the property has a natural gas well so I am leaning towards a small standby generator. Does anyone have any feedback on one brand versus...

It's seems crazy there can be a 1000-1200 watt difference at the same time slot during the day with change in sun angle and temperature. The early May dates I referenced peaked at a bit over 8000 watts and stayed above 7000 watts for several hours versus the last couple of days were the system...

Thank you for the response. Where would I find the temperature power coefficient data? I have called Sunpower trying to get that data three different times and come away with nothing other than being frustrated.