Solar Electrics

31st October :: ML V=12.77 :: Y=530Wh
30th October :: ML V=12.67 :: Y=1.25KWh
29th October :: ML V=12.75 :: Y=1.46KWh
28th October :: ML V=12.80 :: Y=1.28KWh
27th October :: ML V=12.83 :: Y=1.24KWh
26th October :: ML V=12.82 :: Y=1.08KWh
25th October :: ML V=12.78 :: Y=1.02KWh
24th October :: ML V=12.47 :: Y=1.26Wh
23rd October :: ML V=12.67 :: Y=930Wh
22nd October :: ML V=12.79 :: Y=1.42Wh
21st October :: ML V=12.67 :: Y=1.03Wh
20th October :: ML V=12.64 :: Y=1.46KWh

19th October :: ML V=12.75 :: Y=400Wh
18th October :: ML V=12.75 :: Y=530Wh
17th October :: ML V=12.59 :: Y=370Wh

16th October :: ML V=12.69 :: Y=300Wh
15th October :: ML V=12.76 :: Y=500Wh
14th October :: ML V=12.74 :: Y=690Wh
13th October :: ML V=12.64 :: Y=150Wh
12th October :: ML V=12.70 :: Y=50Wh
11th October :: ML V=12.76 :: Y=430Wh
10th October :: ML V=12.56 :: Y=1.53KWh
9th October :: ML V=12.73 :: Y=1.26KWh
8th October :: ML V=12.67 :: Y=310Wh
7th October :: ML V=12.70 :: Y=1.0KWh
6th October :: ML V=12.73 :: Y=360Wh
5th October :: ML V=12.81 :: Y=1.19KWh
4th October :: ML V=12.57 Router on all night
3rd October :: ML V=12.73 :: Y=770Wh
3rd October :: ML V=12.63 :: Y=1.39KWh
2nd October :: ML V=12.86 :: Y=470Wh
1st October :: ML V=12.66 :: Y=390Wh

30th September :: ML V=12.66 :: Y=480Wh
29th September :: ML V=12.67 :: Y=1.15KWh
28th September :: ML V=12.70 :: Y=1.47KWh
27th September :: ML V=12.83 :: Y=1.30KWh
26th September :: ML V=12.74 :: Y=1.13KWh
25th September :: ML V=12.69 :: Y=1.84KWh

• Was already on Float at 09:30 am GMT so set Float to 15.4v

24th September :: ML V=12.70 :: Y=1.37KWh

• 10am GMT Set Float to 16v to equalise but clouds reduced to bulk in 1 min
• 11:06am GMT Set Float to 16v again
• 12:45 The max voltage reached was 15.45 which has dropped to 15.38. The drop I can only imagine is due to sulfation being degraded on the basis that sulfation increases the resistance and hence the voltage will be higher with a constant current.
  14:15The max voltage has dropped to 15.2

23rd September :: ML V=12.51 :: Y=1.29KWh
22nd September :: ML V=12.58 :: Y=210Wh
21st September :: ML V=12.58 :: Y=1.44KWh
20th September :: ML V=12.67 :: Y=110Wh
19th September :: ML V=12.71 :: Y=440Wh
18th September :: ML V=12.68 :: Y=430Wh
17th September :: ML V=12.67 :: Y=420Wh
16th September :: ML V=12.67 :: Y=200Wh
15th September :: ML V=12.71 :: Y=410Wh
14th September :: ML V=12.43 :: Y=630Wh
13th September :: ML V=12.82 Let router on all night :: Y=1.25KWh
After 69 days, (10 weeks -) Topped up electrolyte with many cells showing the plates. Maybe this was reason for high morning voltages. Set ABS to 15.14 and Float 13.62

12th September :: ML V=12.67 Let router on all night :: Y=600Wh
11th September :: ML V=12.89 :: Y=300Wh
10th September :: ML V=12.72 :: Y=1.43KWh
9th September :: ML V=12.91 :: Y=1.41KWh
8th September :: ML V=12.69 :: Y=560Wh
7th September :: ML V=12.87 :: Y=1.74KWh
6th September :: ML V=12.79 :: Y=630Wh
5th September :: ML V=12.83 :: Y=1.40KWh
4th September :: ML V=12.85 :: Y=830Wh
3rd September :: ML V=12.80 After drop to 10.19v when using planer yesterday I thought morning voltage would be low ??? :: Y=1.06KWh
2nd September :: ML V=12.59 Used planer for 1hr yesterday :: Y=1.21KWh
1st September :: ML V=12.82 :: Y=510Wh

31st August :: ML V=12.83 :: Y=310Wh
30th August :: ML V=12.83 :: Y=440Wh
29th August :: ML V=12.83 :: Y=290Wh
28th August :: ML V=12.85 :: Y=560Wh
27th August :: ML V=12.86 :: Y=380Wh
26th August :: ML V=12.88 :: Y=340Wh

25th August :: ML V=12.62:: Y=1.23KWh
24th August :: ML V=12.58 :: Y=970Wh
23rd August :: ML V=12.79 :: Y=1.02KWh

22nd August :: ML V=12.81 :: Y=540Wh
21st August :: ML V=12.82 :: Y=440Wh
20th August :: ML V=12.83 :: Y=480Wh
19th August :: ML V=12.83 :: Y=460Wh
18th August :: ML V=12.83 :: Y=350Wh
17th August :: ML V=12.83 :: Y=360Wh
16th August :: ML V=12.87 :: Y=340Wh

15th August :: ML V=12.69 :: Y=760Wh
14th August :: ML V=12.82 :: Y=780Wh
13th August :: ML V=12.89 ???? :: Y=1.20KWh
12th August :: ML V=12.44 On computer at dawn :: Y=770Wh
11th August :: ML V=12.82 Slept early :: Y=420Wh
10th August :: ML V=12.87 Away for the night :: Y=1.02KWh
9th August :: ML V=12.83 Away :: Y=900Wh
8th August :: ML V=12.79 No load over night as away :: Y=970Wh
7th August :: ML V=12.79 No load over night as slept early. The diff between 12.79 and 12.82 may be due to being on float at 14.65 rather than Abs at 14.95 meaning 500w less charge?? :: Y=1.17KWh
6th August :: ML V=12.82 :: Y=1.25KWh
5th August :: ML V=12.48 Watching movies most of the night :: Y=1.71KWh
4th August :: ML V=12.75 :: Y=1.71KWh
3rd August :: ML V=12.75 :: Y=1.50KWh
2nd August :: ML V=12.81 ??? This high of 12.81 is odd as all load was used the night before. The only other aspect is that the charge was a continuous 14.95 ± due to the consistent but variable cloud :: Y=780Wh See http://unveiled.info/index.php/solect/charging/battery-power-charging?page=3
1st August :: ML V=12.65 Left computer on all night, screen off :: Y=1.33KWh

An obvious thought is that a larger battery requires a larger charge. First however it is important to note that apart from common usage applied to AA and AAA batteries, for example, the word means a collection of units working together, as in a battery of guns.

Battery Cells: Nominal Voltage
Electrically chargeable cells that are used to form batteries range from a nominal voltage of between 1.2 and 2 volts. AA and AAA are 1.5v, Lithium Ion and Lead Acid are 2v. The common Lead Acid battery, used to start a car, is 12v; comprising six 2 volt cells connected in series (end to end).

Power Available: Amp Hours x Volts
Batteries have an amp hour rating which is shown on each battery be it single or a collection of cells. The label may show a value such as [48Ah] in the case of a car battery or [1500mAh](1.5Ah) on a rechargeable Lithium Ion. This figure is a measure of how much charge the battery can release over a given period of time, the most common period is 20 hours called the [20 hour rate]. And unless a battery displays an alternative rate it is assumed it is the 20 hour. So a 48Ah 12v battery has ten times more power than a 48Ah 1.2v.

The power in a battery is roughly Ah x V and in a 48Ah 12v battery is 576 watts or 0.576Kw. In comparison to mains electricity that is enough power to run a one kilowatt single bar electric fire for just over half an hour or a 50w laptop for just under 12 hours. However power output is not linear to load applied, as the quicker a battery is discharged the less efficient it is, hence the 20 hour rate parameter.

The 20 hour rate means that it will produce 48Ah at 12v only if the current drawn is constant and by calculation, at a nominal voltage of 12 that would 4 (48/12). It would power a 48 watt (12v x 4a) load for 12 hours and whereas a lighter load of 24w would run for over 24 hours a larger load of 96 watts would not run for 6 hours. The differences in the power obtained from the 20 hour rate in the examples above are not likely to be huge but the rates of discharge can be much greater. For instance some times I may use only 1 watt when running a single LED for reading but 400 watts when using an electric drill.

The lower the rate of discharge the more efficient the battery is and the less damage that occurs in a complete cycle of charge and discharge thereby extending the number of times that a battery can be recharged, varying from a few hundred to a few thousand.

Charging > Page 2

Pages: 1· 2· 3

31st July :: ML V=12.75 :: Y=1.46KWh
30th July :: ML V=12.79 :: Y=590Wh
29th July :: ML V=12.55 ??? :: Y=500Wh
28th July :: ML V=12.74 :: Y=1.06KWh
27th July :: ML V=12.55 ??? :: Y=770Wh
26th July :: ML V=12.68 :: Y=1.50KWh
25th July :: ML V=12.64 :: Y=1.48KWh
24th July :: ML V=12.74 :: Y=1.36KWh
23rd July :: ML V=12.59 Left computer, router and camera on all night :: Y=890Wh
22nd July :: ML V=12.64 :: Y=1.47KWh
21st July :: ML V=12.68 :: Y=1.03KWh
20th July :: ML V=12.63 :: Y=1.51KWh
19th July :: ML V=12.72 :: Y=1.74KWh
18th July :: ML V=12.73 :: Y=510Wh
17th July :: ML V=12.71 :: Y=640Wh
16th July :: ML V=12.70 :: Y=720Wh

Away from 13th to 15
15th July :: ML V=12.71 :: Y=320Wh
14th July :: ML V=12.71 :: Y=320Wh
13th July :: ML V=12.63 :: Y=470Wh

12th July :: ML V=12.64 :: Y=1.32KWh
11th July :: ML V=12.70 :: Y=650Wh
10th July :: ML V=12.52 :: This low morning voltage may be due to running the fridge all day and the charge never reaches 15.** v :: Y=1.32KWh

9th July :: ML V=12.69 :: This is a low morning voltage given there was no use last night. Compare to 5th and 2nd July :: Y=1.44KWh

8th July :: ML V=12.59 :: This lower than usual morning voltage may be due to the more gentle charging and will continue such for a while. :: Y=1.56KWh

7th July :: ML V=12.69 :: Y=1.35KWh Set ABS to 14.95 with no disturbance from a short heavy load that would reset to BULK as I often do

6th July :: ML V=12.82 :: Y=1.73KWh
After 44 days, (6 weeks +) Topped up electrolyte with two cells was just showing the plates. Lowered ABS voltage to 14.95. Although I had taken account of the temperature I had not reduced the charging routine much and was disappointed to find some cells verging on damagingly low levels. Should write a bot about charging routine when voltage drops after FLOAT and then rises to below ABS bit stays at 14.65 if ABS at 14.95 or in winter 15.4 and 15.64

5th July :: ML V=12.91 Little use last night :: Y=1.40KWh
4th July :: ML V=12.70 :: Y=760Wh
3rd July :: ML V=12.74 :: Y=1.22KWh
2nd July :: ML V=12.91 Away for the night. :: Y=840Wh
1st July :: ML V=12.85 :: Y=930Wh

Bought D26500K for £199.95 to level and match 100mm joist beams
From D&M Tools, Twickenham. 02088923813 (Lee)
Made in Czech Republic

DeWalt 01753 567055 of Stanley Black and Decker

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Email about
1. Blade setup
2. No Allen key and not indication of size so I have to fiddle around to find a fit which may not be the best and damage the hexagonal socket shape
3. Plastic foot bob gets in the way and should have an option to click it horizontal so as not to use, or removable, like the height adjuster.

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Plymouth Tools and Spares 01752 361474, 111 Victoria Hill to dispose of ELU