• 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 + +)



    31st May : ML V=12.67   Y=970Wh   I 
    30th May : ML V=12.71Y=990Wh   I 
    29th May : ML V=12.71Y=1.02KWh   I 
    28th May : ML V=12.78Y=940Wh   I 
    27th May : ML V=12.74Y=900Wh   I 
    26th May : ML V=12.81Y=870Wh   I 
    25th May : ML V=12.70Y=710Wh   I 
    24th May : ML V=12.70Y=600Wh   I 
    23rd May : ML V=12.74Y=550Wh   I 
    22nd May: ML V=12.84Y=60Wh Low yield as the battery is near capacity and little daytime load.
    21st May : ML V=12.74Y=760Wh   I 
    20th May : ML V=12.74Y=750Wh   I 
    19th May : ML V=12.77Y=330Wh   I 
    18th May : ML V=12.71Y=820Wh   I 
    17th May : ML V=12.75Y=770Wh   I 
    16th May : ML V=12.76Y=370Wh   I 
    15th May : ML V=12.72Y=860Wh   I 
    14th May : ML V=12.78Y=810Wh   I 
    13th May : ML V=12.59Y=620Wh   I  Install invoked equalisation at 15.94v with a max 4.8A for 4 hours
    12th May The Rolls S12 27 specific gravity just before installation around sunset was:
    1: 1.260 | 2: 1.265 | 3: 1.250 | 4: 1.250 | 5: 1.245 | 6: 1.250



    Yield :: 610 | 600 | 450 | 320 | 190 | 90   P : Power Tools | F : Fridge


    12th May : ML V=12.59Y=960Wh  F
    Have swapped battery from Gavin's 41Ah to the new Rolls S12 27 so will be setting a new MPPT profile. 22Kw have been yeilded to the 41Ah since ???

    11th May : ML V=12.63Y=790Wh  F
    10th May : ML V=12.67Y=440Wh  F
    9th May ::: ML V=12.72Y=700Wh  F

    8th May ::: ML V=12.83Y=390Wh Inverter downgraded from Victron 1200w > SkyTronic 300w so no more power tool usage.  F

    7th May ::: ML V=12.59Y=590Wh   ML 12.59 ?? The only reason I can think of is that the battery only went to float very late as I had the inverter on all day. This means that the ABS/FLT settings do not readily bring it to 100%  P  F   Also controller was reset later in the day as I disconnected to remove the inverter.

    6th May ::: ML V=12.60Y=770Wh   ML 12.60 ??  F
    5th May ::: ML V=12.63Y=200Wh
    4th May ::: ML V=12.67Y=540Wh  F
    3rd May ::: ML V=12.67Y=200Wh
    2nd May :: ML V=12.74Y=500Wh  F
    1st May ::: ML V=12.63Y=290Wh

  • Yesterday I spoke to Les at Durite about my concerns and today 29th May spoke to Mellisa who is sending an email to Les with directions to this page.

    a) there is difficulty in viewing the thermometer liquid, being red doesn't help as that is also the background colour of the container shedding red light eveyrwhere. It appears as though the thermometer is skewed by some 20 to 30 degrees. It can't be adjusted :(

    b) After my earlier conversation I noted the scale is high by about 2 points, to resolve that I cut a small strip off the removable scale insert to set it lower.

    Here are images of the issue a)

    1. I slipped a small peice of a plastic bag behind the thermometer to contrast the background and block any red relfection. You can see the red liquid is just about visible when looking directly at it.

    2. When viewing from the right about 30° the liquid is clearly visible.

    3. With the scale reinserted and looking at it straight on

    4. With scale inserted and looking from 20°

  • Durite 472 (May 2020)


    Durite Precision Hydrometer with thermometer.
    Set in adapted Vintage Port wooden box.

    For more detail see: hydrometer-durite472

  • Update: May 28th 2020
    Received the Durite 472. It's larger than I thought but usuable. The liquid in the thermometer is red as is the surround so it's difficult to read the temp.Spoke to a guy at tech 01255 555200 for over half an hour ~ details should be appended ~ Need to make a nice box for it.

    Update: May 23rd 2020
    I broke the glass containers on both the hydrometers mentioned below and have bought a premium claibrated (0.002) sg @ some £54. A Durite model 472 It has a range of 1.22 to 1.3 so the scale will also be larger than the previous buys.


    I have ended up buying two hydrometers. I first called Plymouth Battery Centre who informed me they had a glass model at £19 which I thought was a bit expensive so when I went to town I thought I'd look around before I took the mile or more walk to Prince Rock.

    The Toolshed could get a glass model for £5 and the car shop next door had the same model for £2.99, which I bought. When I went to the Plymouth Battery Centre to buy some red and black covered multi-core cable I decided to buy the hydrometer they had anyway, which cost £14.50 eventually.

    The better model from Plymouth battery Centre is the one on the left, although you cannot see the coloured scale. It is supplied by Gordon Equipments under the name DURITE model 0-070-00 ; range 1.15 to 1.40; accuracy 0.01. All parts are individually replaceable.

    The difference in readings is notable.

    Concerns regarding the cheapo

    1. The float diameter is much smaller than the container diameter so the readings are at an angle.
    2. On the side of the container the float rests, the surface tension of the acid draws the liquid further up the side of both, giving a distorted view.
    3. The scale is on the small side so not so easy to read.
    4. And of course there's the idea that the calibration is off.