• **Jan 8th**
    Grey day and only 13.5v at 14:45 into 2 batteries from 2 panels.
    Received Victron cable and is working, see
    More useful would be the
    >VBS-MPPT100/30 BlueSolar MPPT 30A charge controller 100V input, 12/24V output
    £147.00 +VAT

    which can take 2 panels in series and handle 30A

    Pages: 1· 2· 3

  • **1st** I connected Batts (1,2 and 4) in parallel to charge and note that the voltage is decreasing to 15.34 although current is steady at 13.7A. This could mean the sulfation is breaking down and batteries are showing lower resistance.** Notable day** in that 1.26Kw was absorbed one way or another, and all three batteries had a few hours of >15V
    **5th** Batts (1,2 and 4) Voltage dropped 15.6, 15.46, 15.38 with continuous 15A indicating hopefully breaking down of more sulfate and lowering of resistance. Final values are 13.63 @0.2A charge
    **9th** Batts (1,2 and 4) Voltage dropped 15.63, 15.56, 15.37 (15.4, 13.9, 13.9) from 11:00hr to 15:37. Adding 1.3A load had no effect on voltage or amperage?
    **10th** Around midday I rearranged all batteries. Batt4 becomes the regular load, Batt3 the secondary and Batt1 the reserve. Batt2 has been taken to Gavin's for a prolonged mains charge at 14.6V
    All batteries required water, some especially Batt 1 was only just covering the plates so have reduced absorption voltage from 15.94 to 15.64 and float to 15.4
    **11th** Batteries took best part of 1.03Kwh then at 17:25 disconnected Batts 3 and 1 at 13.11V 1W
    **12th** All 3 batteries connected at 08:55 :: 08:47 Abs :: 10:08 Flo
    Used Batt 3 with inverter with hardly any load. and surprised to see the voltage drop to 12.26 at 00:10
    **15th** Collected Batt 2 from Gavin's having been on charge for three days at >14.5 taking 3A. Topped electrolyte up and connected all 4 batteries. The negatives are connected 4_2_3_1 The positives are connected 4_2 and 3_1 with a manual option between both pairs. All charging at 15.33 at 13.5A.
    **17:33** B*4 V=12.6
    **16th** All 4 batteries connected and MPPT Bulk/Abs set to 15.46V and float to 14.15V
    **06:20** V=12.59 then used for 1 hour.
    **17-19th** All 3 batteries connected Lowest 12.57V
    **20th 12:75** Float V=14.03 @0.5A :: **12:49** Change Float to 14.5V ~ 2.1A :: **13:42** V=14.49 @1.9
    **13:49** Change Float to 14.95V ~ 6.7AV ~ 2.1A **16:04** Disconnect Inverter and Batts 1 and 3
    **20th** Float at 14.95V
    **21st 13:20** reduced Float to 14.5V :: 3.2A = 4(0.8) @ 47W :: **16:52** Disconnect Batts 3 and 1
    Batt 4 and 1 No load **16:55** 13.23v/3.2a :: 17:05 13.52/0.9a
    **22nd 11:24** Float 14.49v ~ 2a **11:29** Connect Batts 3 and 1 dis at **16:42** V=13.84v
    **24th 09:30** All 4 connected V=15.12 A=12.6 W=233 :: 10:35 Float @ 14.95v changed to 14.5v ~2.9a :: 13:38 V=14.49 A=2.2 @31W :: 13.39 reduced float to 14.15 :: 13:41 A=1.2
    **25th 10:13** All 4 connected :: **10:41** Abs V=15.490 A=13.5 :: 12:35 reduced Abs to 15.4 :: 12:39 Float :: 13:12 Float to 14.95v :: 14:53 Float to 14.5v
    **26th 09:42** All 4 connected Abs set to 15.64v :: 15:16 Disc Batts 3 and 1 @ 14.18v :: 17:41 V=13.61 Y=1Kw
    **27th 08:45** Abs 15.62v :: Connected 3 and1, Abs, 08:52 V=15.30 :: 09:45 Float :: 10:00 dis batts 3 and 1, switch on inverter to use grinder.:: 16:00 no load reading ?? Yield 1.43Kw
    **28th 08:30** Connected Batts 3 and 1 V=14.45 :: 08:50 Abs at 15.5v :: 16:23 disconnected Batts 3 and 1 :: With clouds on and off stayed on Bulk for most of the day and yielded a surprising 1.48Kw ::

  • 1. 9" Makita 2.5Kw
    2. 4.5" Black and Decker Pro 700w

  • In the process of cleaning to see if it is usable.
    Have three seized bearings, allk dif sizes, one has paper package with labelling:
    0760245 000 0000
    D931814 Q 1
    The 9 could be an 8

  • 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

  • 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 ????