Solar Electrics

24th April :: ML V=12.67⇖Y=790Wh
23rd April :: ML V=12.71⇖Y=1.20KWh
22nd April : ML V=12.63⇖Y=1.58KWh
21st April :: ML V=12.64⇖Y=1.90KWh
20th April :: ML V=12.67⇖Y=1.87KWh
19th April :: ML V=12.64⇖Y=1.85KWh
18th April :: ML V=12.65⇖Y=1.68KWh
17th April :: ML V=12.64⇖Y=1.34KWh
16th April :: ML V=12.41⇖Y=800Wh
15th April :: ML V=12.59⇖Y=880Wh
14th April :: ML V=12.63⇖Y=820Wh
13th April :: ML V=12.64⇖Y=1.01KWh
12th April :: ML V=12.83⇖Y=1.21KWh Battery 3 plates were exposed. Reduce charge voltage
100ml average battery cell top up.
11th April :: ML V=12.83⇖Y=2.04KWh Given ML @ 12.83 better check electrolyte
10th April :: ML V=12.71⇖Y=1.62KWh
9th April :: ML V=12.74⇖Y=740Wh
8th April :: ML V=12.59⇖Y=1.55KWh Low ML due to fridge being on yesterday !?
7th April :: ML V=12.79⇖Y=1.14KWh
6th April :: ML V=12.78⇖Y=1.74KWh
5th April :: ML V=12.78⇖Y=540Wh
4th April :: ML V=12.62⇖Y=920Wh
3rd April :: ML V=12.64⇖Y=1.45KWh
2nd April : ML V=12.72⇖Y=1.15KWh Only one solar panel connected until 10am GMT
1st April :: ML V=12.60⇖Y=1.39KWh Only one solar panel connected today

31st March :: ML V=12.60   Y=1.92KWh
30th March :: ML V=12.64⇖Y=1.73KWh
29th March :: ML V=12.54⇖Y=1.87KWh
28th March :: ML V=12.58⇖Y=1.79KWh
27th March :: ML V=12.64⇖Y=1.90KWh
26th March :: ML V=12.59⇖Y=2.02KWh
25th March :: ML V=12.51⇖Y=1.73KWh
24th March :: ML V=12.50⇖Y=1.75KWh
23rd March :: ML V=12.51⇖Y=360Wh
22nd March : ML V=12.51⇖Y=600Wh
21st March :: ML V=12.52⇖Y=350Wh
20th March :: ML V=12.52⇖Y=460Wh
19th March :: ML V=12.69⇖Y=1.27KWh
Checked battery electrolyte level and all plates were covered. Added approx 2.2Lt ≈ 90ml per cell
The ML drops : see https://unveiled.info/solect/specific-gravity-1

18th March :: ML V=12.78 :: Y=560Wh Given ML of 12.78 will check battery electrolyte level
17th March :: ML V=12.51⇖Y=1.32KWh
16th March :: ML V=12.58⇖Y=220Wh
15th March :: ML V=12.66⇖Y=280Wh
14th March :: ML V=12.51⇖Y=460Wh
13th March :: ML V=12.39⇖Y=1.36KWh Incubator lamp all night
12th March :: ML V=12.44⇖Y=610Wh Incubator lamp all night
11th March :: ML V=12.44⇖Y=1.41KWh Incubator lamp all night and day
10th March :: ML V=12.43⇖Y=1.21KWh Incubator lamp all night
9th March :: ML V=12.47⇖Y=670Wh Incubator lamp all night
8th March :: ML V=12.44⇖Y=440Wh Incubator lamp all night
7th March :: ML V=12.47⇖Y=1.35KWh Incubator lamp all night
6th March :: ML V=12.36⇖Y=430Wh Incubator lamp all night
5th March :: ML V=12.48⇖Y=510Wh Incubator lamp all night
4th March :: ML V=12.30⇖Y=840Wh Incubator lamp all night
3rd March :: ML V=12.48⇖Y=190Wh
2nd March :: ML V=12.62⇖Y=460Wh
1st March :: ML V=12.50⇖Y=890Wh

For lead Acid Batteries

There are two processes where the battery resistance will change.

a) The normal operation of charging a battery will increase it's resistance, whilst removing sulfation, and the resistance will drop as sulfation occurs. This follows the formula that V=I × R.
With a constant current (I) the battery charges the voltage (V) rises. Is simple terms as an equation must balance then if one side increases then so must the other. So if V rises then I &times R must also rise and of I is constant then R must rise. The reverse is the case when the battery discharges.

b) Although sulfation and de-sulfation are the normal reactions in a lead acid battery sulfation can become ingrained and not subject to being processed by normal charging. In this case the battery appears charged and has a high resistance. To overcome this, or at least to try to, a high voltage can be applied in an attempt to force the sulfate to return to the electrolyte.

A lead acid battery will have a ration of sulfuric acid and water as the electrolyte. The process of charging forces any sulfate from the battery plates back to the electrolyte which increases it's specific gravity. The specific gravity of pure water is set at 1. By dissolving substances in water makes if heavier per volume. The common amount of acid brings electrolyte specific gravity (SG) to 1.128 approx.

Measuring the SG with a hydrometer can show if the acid is in the plates and they are sulphated.

The two times this would occur is a) in the normal process of discharging and b) in the longer term build up of sulphated plates that do not respond to a normal charge and the battery is termed 'sulphated'

The SG will also vary on the level of electrolyte as the water evaporates. As water evaporates the SG increase along with ration of acid to water. Adding water will lower the SG and show the battery is not as fully charged as it may seemed when the electrolyte was lower than the designed level.

[b]Victron Direct[/b]
V5.4 9th March 2019 :: Firmware 1.39
V5.3 12th February 2019 :: Firmware 1.39
V5.2 on 9th January 2019 :: Firmware 1.37
V5.1 on 5th July 2018:: Firmware 1.37
V4.8 on 5th July 2018

28th February :: ML V=12.52 :: Y=520Wh
27th February :: ML V=12.55 :: Y=1.79KWh
26th February :: ML V=12.52 :: Y=1.80KWh
25th February :: ML V=12.38 :: Y=1.74KWh Left router on all night ??
24th February :: ML V=12.54 :: Y=1.58KWh
23rd February :: ML V=12.50 :: Y=1.46KWh
22nd February :: ML V=12.50 :: Y=1.23KWh
21st February :: ML V=12.52 :: Y=1.18KWh
20th February :: ML V=12.52 :: Y=360Wh
19th February :: ML V=12.37 :: Y=930Wh
18th February :: ML V=12.51 :: Y=1.02KWh
17th February :: ML V=12.44 :: Y=530Wh
16th February :: ML V=12.48 :: Y=150Wh
15th February :: ML V=12.44 :: Y=980Wh
14th February :: ML V=12.56 :: Y=1.58KWh
**After 9 weeks topped up batteries:** None of the plates were exposed but did use the best part of 5Lt
**EQUALIZING**By setting Absorption and Float to 16v
**EQUALIZING**Although ABS set at 15.64 which was reached around 9:30am by 13:00 v has dropped to <15.4 though set at 16v. Again I am inclined to consider resistance is dropping and undoing some of the sulfation
13th February :: ML V=12.51 :: Y=670Wh
Although I reset the mppt after midnight it created two records by 09:20 so I reset it again and noted the ML and consumption
12th February :: ML V=12.64 :: Y=220Wh
Updates and Firmware updates were carried out between 16:30 and 16: 50 and there was no recorded yield since.
The values in both columns headed today and yesterday are those of the 12th. I will be resetting the datafile soon to avoid visual errors.

11th February :: ML V=12.64 :: Y=610Wh
10th February :: ML V=12.43:: Y=830Wh
9th February :: ML V=12.43:: Y=550Wh
8th February :: ML V=12.52:: Y=160Wh
7th February :: ML V=12.50:: Y=760Wh
6th February :: ML V=12.63:: Y=750Wh
5th February :: ML V=12.63 :: Y=100KWh
4th February :: ML V=12.65 :: Y=560Wh
3rd February :: ML V=12.54 :: Y=890Wh
2nd February :: ML V=12.67 :: Y=1.17KWh
1st February :: ML V=12.62 :: Y=410Wh