• Morning Low ::12.63 | < 12.63 | < 12.39 | < 12.03     Yield :: 900 | 540 | 230 | 100 | 90
    Morning Low is the voltage before any use.
    Yield is the power used including power via the inverter. ~  I  Indicates Inverter Use (Fridge + +)

    12th July : ML V=12.70Y=920Wh   I 
    11th July : ML V=12.81Y=770Wh   I 
    10th July : ML V=12.95Y=410Wh   I 
    9th July ::: ML V=12.75Y=120Wh
    8th July ::: ML V=12.86Y=120Wh
    7th July ::: ML V=12.91Y=380Wh   I 
    6th July ::: ML V=12.78Y=740Wh   I 
    5th July ::: ML V=12.66Y=530Wh   I 
    4th July ::: ML V=12.70Y=190Wh
    3rd July ::: ML V=12.64Y=270Wh 12.64 Left router on all night.
    2nd July :: ML V=12.87Y=490Wh   I 
    1st July ::: ML V=12.74Y=230Wh   I 

  • The Electric Control brings together the inputs from solar panels via terminal, where adjustments can be made, to charge controllers that feed the batteries. The main update for 2018 is the terminal blocks that allow the solar panels to be connected separately to two banks of batteries, and be connected in parallel or series and bypass the controllers to fed the batteries directly.

    control panel with MPPT

    To connect two panels a terminal block of eight is used. A terminal for the positive and negative of each panel, each of which is then connected to another terminal.

    1. The top of the block has the inputs. To the left, the larger black cables with blue and red tape to indicate polarity, and to the right a brown and blue mains electric style wires.
    2. The negative outputs are connected to the respective controllers and there is a blue wire that joins the negative of both solar panels and controllers.
    3. The positive outputs are the red wires going to the two double terminal blocks immediately below.

    The two blocks below take the positive output from the main block via the red wires. The outputs of each are wired to a) the input terminal of the controllers and b) to battery output of the controllers to bypass an feed directly to the batteries. The selection being done manually by moving the red input wires.

    Alternative arrangements for the solar inputs are:
    1. In parallel: Take the red output wire from one panel and connect it to the spare terminal at the bottom adjacent to and connected to the other output.
    2. In cloudy weather this gives increased output to be used with the controller or can be done to overcharge (equalise) batteries when the controller doesn't have that function.
    3. In series: Only used when the cloud cover is very low and the combined voltage is below 75v the maximum for the Victron 75 | 15

  • Run a 6mm copper bar via a terminal block from the inner wall to the outer. Have yet to connect the rod to the external earth.

    6mm rod held of from wall by paduk block.

    July 4th Have used old stiff 7 strand 3mm earth wire and connected MPPT, Battery and Inverter to earth block.

    Earthing of inverter, battery and MPPT. (Highlighted)

    July 11th I have finally soldered the internal earth rod to the external grounding strip, it is not pretty and I could have a) made a better job of it by protecting the wood and mains cable or b) made a nice copper clamp to join them ~ a future mini project.
    Connection is only soldered at rod end but soldered and bolted at strip end. Area has been tar-oiled.

    To see a better extent of the scorch marks view ~ Scorch Extent

  • Morning Low ::12.63 | < 12.63 | < 12.39 | < 12.03     Yield :: 900 | 540 | 230 | 100 | 90
    Morning Low is the voltage before any charge or use, if I'm up, else it is the lower value of max and min.
    Yield is the power used including power via the inverter. ~  I  Indicates Inverter Use (Fridge + +)

    30th June : ML V=12.82   Y=120Wh
    29th June : ML V=12.87Y=100Wh
    28th June : ML V=12.91Y=360Wh   I 
    27th June : ML V=12.71Y=170Wh   I 
    26th June : ML V=12.74Y=100Wh
    25th June : ML V=12.79Y=900Wh   I 
    24th June : ML V=12.87Y=910Wh   I 
    23rd June : ML V=12.78Y=830Wh   I 
    22nd June: ML V=12.68Y=100Wh
    21st June : ML V=12.71Y=110Wh
    20th June : ML V=12.82Y=500Wh   I 
    19th June : ML V=12.75Y=160Wh
    18th June : ML V=12.70Y=130Wh
    17th June : ML V=12.87Y=130Wh
    16th June : ML V=12.83Y=280Wh   I 
    15th June : ML V=12.83Y=770Wh   I  Checked electrolyte levels.
    14th June : ML V=12.79Y=110Wh   I 
    13th June : ML V=12.83Y=70Wh
    12th June : ML V=12.79Y=80Wh
    11th June : ML V=12.74Y=190Wh   I 
    10th June : ML V=12.83Y=90Wh
    9th June ::: ML V=12.75Y=150Wh   I 
    8th June ::: ML V=12.58Y=80Wh ML V=12.58 ???
    7th June ::: ML V=12.90Y=250Wh   I 
    6th June ::: ML V=12.75Y=320Wh   I 
    5th June ::: ML V=12.67Y=310Wh   I 
    4th June ::: ML V=12.74Y=340Wh   I 
    3rd June ::: ML V=12.75Y=220Wh
    2nd June :: ML V=12.79Y=950Wh   I 
    1st June ::: ML V=12.87Y=910Wh   I 

  • The batteries arrived today with the MPPT and have been installed. It was late in the day before I had finshed and initially the controller went to bulk then abs.

    The first thing I did was to make a stainless steel backplate to fasten the controller to and use copper and plastic tubing to keep it off the wall, only a centimetere or so.

    I have also connected the 1200w inverter, but there is no other loading.

    Layout of supply and controls

    Layout of supply and controllers

    May 7th Battery voltage of the 2 x S6 145's in series was 12.76. The electrolyte was high in one cell so I distributed it amongst all six.

    Cable from MPPT to batteries is approx AWG 8 or 8.4² (50 amps)

    Could do with
    See https://www.altecautomotive.co.uk/25mm2--4-awg-automotive-cable-17000amp-2040watts-rated-various-colours-available-375-p.asp

    May 9th Electrolyte levels are fine

    Measured the SG.

    May 13th Must use VE Direct USB to set up MPPT and equalise.

    June 17thHave fitted a fuse box to inverter output and wiring from there to a) 6A fuse to wiring for sockets to a double socket about the workbench, a double socket by the computer platform and wire to a further socket by the steps. b) 16A fuse for cable to external socket and c) Unfused to a 3 gang row above the electric work bench.

    So for power to any 1) switch on inverter, 2) switch on fuse box.

    I will not be making a spreadsheet of input and output for a while.

  • The three sizes I am interested in are: Data, prices and links as of June 2020

    2 x 4mm2 x 6mm2 x 10mm
    Rated Amps303951
    OD in mm9.611.814.5
    Loss mV/A/m127.84.6
    Cost £/m 2.413.414.33

    For more detail and other sizes see H07RN-F Data Sheet from ukcables.co.uk