Electrics

31st July : ML V=12.70   Y=630Wh   I  ML V=12.70 Left computer on charge overnight but didn't fully charge??
30th July : ML V=12.82⇖Y=900Wh   I 
29th July : ML V=12.79⇖Y=890Wh   I  ML V=12.79 had been 12.82 at some point but due to cold had dropped 0.03v by sunrise.(04.20 GMT)
28th July : ML V=12.82⇖Y=450Wh   I 
27th July : ML V=12.87⇖Y=240Wh   I 
26th July : ML V=12.90⇖Y=420Wh   I 
25th July : ML V=12.74⇖Y=230Wh   I  ML V=12.74 >> Surprised as left router on all night
24th July : ML V=12.90⇖Y=290Wh   I 
23rd July : ML V=12.94⇖Y=210Wh   I  ML V=12.94 >> Checked electrolyte levels. Although they seemed fine I added some (10 to 16)ml each
22nd July: ML V=12.82⇖Y=1.17KWh   I 
21st July : ML V=12.74⇖Y=970Wh   I 
20th July : ML V=12.74⇖Y=960Wh   I 
19th July : ML V=12.78⇖Y=450Wh   I 
18th July : ML V=12.67⇖Y=600Wh   I  Scheduled Equalisation
17th July : ML V=12.84⇖Y=780Wh   I 
16th July : ML V=12.83⇖Y=200Wh   I 
15th July : ML V=12.74⇖Y=120Wh
14th July : ML V=12.82⇖Y=440Wh   I 
13th July : ML V=12.74⇖Y=240Wh   I 
12th July : ML V=12.70⇖Y=920Wh   I 
11th July : ML V=12.81⇖Y=770Wh   I 
10th July : ML V=12.95⇖Y=410Wh   I 
9th July ::: ML V=12.75⇖Y=120Wh
8th July ::: ML V=12.86⇖Y=120Wh
7th July ::: ML V=12.91⇖Y=380Wh   I 
6th July ::: ML V=12.78⇖Y=740Wh   I 
5th July ::: ML V=12.66⇖Y=530Wh   I 
4th July ::: ML V=12.70⇖Y=190Wh
3rd July ::: ML V=12.64⇖Y=270Wh 12.64 Left router on all night.
2nd July :: ML V=12.87⇖Y=490Wh   I 
1st July ::: ML V=12.74⇖Y=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.

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.

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

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.

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

---

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

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

	2 x 4mm	2 x 6mm	2 x 10mm
Rated Amps	30	39	51
OD in mm	9.6	11.8	14.5
Loss mV/A/m	12	7.8	4.6
Cost £/m	2.41	3.41	4.33

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

Probably not a lot of noteable acitivity in the box, but it is the object of speculation. The lid being only 7" x 3" with a depth of some 3 and 3/8ths. It weights some 6lb 10oz (3Kg). The content seems to be a block that can move a little vertically but there is no detecteble movement, by hand, horizontally.

The box has been sealed by what looks like solder and what would be important enough to seal from the air. Including the steel box that appears to be a maximum of 1/16" thick the density is (weight / volume) = 3Kg ÷ 1.14Lt = 2.63.

The density is to hight for paper money or any sort of biological matter. Most metals have a higher density and why would a piece of metal be so contained?

Well after some 32 years or more maybe it's time to open the bow, by grinding off the lid edges.