• 05|May

    31st May :: ML V=12.71 :: Y=900Wh
    30th May :: ML V=12.64 :: Y=430Wh
    29th May :: ML V=12.65 :: Y=660Wh

    Away from midday Fri 25 until 07:00BST 28th. Set Abs to 15.14 and Flt to 13.92 and left router and camera on
    28th May :: ML V=12.52 :: Y=1.48KWh
    27th May :: ML V=12.52 :: Y=690Wh
    26th May :: ML V=12.52 :: Y=560Wh
    25th May :: ML V=12.52 Left router on all night by mistake :( :: Y=810Wh

    24th May :: ML V=12.56 :: Y=880Wh
    23rd May :: ML V=12.64 Left camera on all night by mistake with no router :) :: Y=1.83KWh
    22nd May :: ML V=12.89
    Topped up electrolyte after 30days. Then it seemed the charge voltage dropped with the same current maybe as the resistance increased due to more water. May lower charging rates.
    Y=1.35KWh Went to town around 15:30 so lowered Abs to 15.14 and Flt to 13.96 > 3hr52 on Flt.

    If the battery cells require watering more than once every two (2) months the
    programmed charging voltages may be too high. Adjust and monitor accordingly. If a
    particular cell requires significantly more water than others this may be a sign of charge
    imbalance in the battery bank caused by resistance and/or cell failure

    21st May :: ML V=12.47 Up all night :: Y=1.74KWh
    20th May :: ML V=12.75 :: Y=1.85KWh
    19th May :: ML V=12.78 :: Y=1.96KWh
    18th May :: ML V=12.59 :: Y=1.71KWh
    17th May :: ML V=12.71 :: Y=1.79KWh
    16th May :: ML V=12.79 No load previous evening/night :: Y=820Wh
    15th May :: ML V=12.70 :: Y=1.92KWh
    14th May :: ML V=12.79 No load previous evening/night :: Y=1.92KWh
    13th May :: ML V=12.70 Tablet charging overnight :: Y=1.65KWh
    12th May :: ML V=12.60 Left camera on all night by mistake :: Y=1.33KWh
    11th May :: ML V=12.78 :: Y=690Wh
    10th May :: ML V=12.52 :: Y=1.46KWh
    9th May :: ML V=12.60 :: Y=740Wh
    8th May :: ML V=12.71 :: Y=1.04KWh
    7th May :: ML V=12.71 :: Y=1.96KWh
    6th May :: ML V=12.71 :: Y=1.71KWh
    5th May :: ML V=12.59 :: Y=1.18KWh
    4th May :: ML V=12.67 :: After 100w yield, in 3h 21m at 08:13GMT, switched to Abs meaning the panels picked up enough light at 04:52GMT
    3rd May :: ML V=12.64 ::
    2nd May :: ML V=12.58 :: Blk & Abs for 4hr+ Query ( Plenty of sun and yield is 1.23KWh but when sunshine drops it goes to Blk. This is unusual as I've often been concerned with the alternative, in that when the clouds are around it stays at Abs or when drops out of Abs it quickly goes back and the time of Abs is only lengthened by small amount. The only difference is that yesterday I used the inverter which can take some 60A for short periods - I wonder if the deep cycle stirs up the electrolyte and the plates so that now it is charging deeper. Y=1.58KWh
    1st May :: ML V=12.60 :: Used inverter for 20 min :: Y=1.19KWh
  • Victron Blog

    Just started: User name :: Roger

    Victron On-line discussion/blog

  • Float or End of Charge

    From: http://rollsbattery.com/wp-content/uploads/2018/01/Rolls_Battery_Manual.pdf
    When the Absorption charge is completed, the batteries require a certain amount of voltage to maintain a full charge when no load is applied. This Float voltage maintains the battery bank at a constant full state of charge. To prolong battery life, the Float settings on the power supply should be adjusted to the voltage indicated in Table 2 (a) & 2 (b) Flooded Charging Parameters. Higher or lower voltage settings may result in unnecessary overcharge or sulfation.

    >**End of Charge**
    As batteries near full capacity the charge current drops. End Amps or Return Amps generally refers to the lowest amount of current (Amps) running from the charger when the batteries have reached full capacity and are no longer accepting a charge. Some charges will measure the actual current output. If the charge current drops to the End Amps or Return Amps set point, this will trigger the charger to shut off. This setting is typically 2%-3% of the 20 Hr AH rating (C20) of the battery bank. Rolls recommends setting this at 2% for new installations

    For the ELF set up of some 500Ah this would be 10A ????

  • Temperature whilst Charging

    Chemical reaction is slow at lower temperatures and so a higher voltage will be required to charge. See first post under charging: http://unveiled.info/index.php/solect/charging/
    Charging temperature compensation

  • 04|April

    **30th April** :: ML V=12.69 :: No load over night ABS for 1h
    **29th April** :: ML V=12.51
    **28th April** :: ML V=12.54 :: ABS for 2h although as low as 14.6 sometimes ??
    **27th April** :: ML V=12.60 :: ABS for 1h
    **26th April** :: ML V=12.46 :: ABS for 1h 14m
    **25th April** :: ML V=12.43 :: ABS for 1h 28m
    **24th April** :: ML V=12.51 :: Router on all night
    **23rd April** :: ML V=12.51 :: Camera on all night
    **22nd April** :: ML V=12.63 :: Topped up electrolyte which in some cells was just showing the plates. Then it seemed the charge voltage dropped with the same current maybe as the resistance increased due to more water.
    **21st April** :: ML V=12.62 :: Router and camera on all night (0.9A)
    **20th April** :: ML V=12.64 :: Router and camera on all night (0.9A)
    **19th April** :: ML V=12.78 :: 10am GMT Float @14.05V
    **18th April** :: ML V=12.55
    **17th April** :: ML V=12.87 :: T=150Wh Low for a 13h 28m day
    **16th April** :: ML V=12.87 :: Note an average of 405Wh keeps the ML at 12.87
    **15th April** :: ML V=12.87
    **14th April** :: ML V=12.91 :: Required 520Wh or 10Ah per battery from the previous day to get this ML figure.
    **13th April** :: ML V=12.80
    **12th April** :: ML V=12.80
    **11th April** :: ML V=12.78
    **10th April** :: ML V=12.91 :: 09:30 V=14 A=0.8 13.84V at 0.4A
    **9th April** :: ML V=12.91 Away all day and night . On Fl for 7.25hrs
    **8th April** :: ML V=12.75
    **7th April** :: ML V=12.82 :; **08:30** Y=10W (after 3 hours of daylight)
    **6th April** :: ML V=12.72 with router on all night
    **5th April** :: ML V=12.89 :: **09:22 V=15.46 ~ Ab**
    **4th April** :: ML V=12.82
    **3rd April** :: ML V=12.95 :: Used Inverter with angle grinder for 30min :: Y=1.07KWh
    **2nd April** :: ML V=12.59 :: **12:30** V=13.55 A=5 W=80 Y=160 :: **15:51** V=14 A=4.8 W=68 :: **19:30** V=13.3 A=0.1
    **1st April** :: ML V=12.74

  • Wind and Sun

    http://www.windandsun.co.uk/ | 01568 720364
    info@windandsun.co.uk | James Ford <James@windandsun.co.uk>

    I've had contact with Wind and Sun from the late 80's when I first researched suppliers for a wind generator and solar panels. The panels eventually came direct from BP and have lasted well except for physical damage. So I felt it was time to honour the contact when |I wanted a new setup. All the current one is from them (solar panels and cables, batteries and controllers) I hate to call the Victron Blue Solar MPPT a charger as it falls far short being based on the vagrancies of sunlight. More on that on the Victron critique.