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  1. R

    Battery Volts / SOC relationship

    Despite making goodness how many observations I have not been able to establish a relationship between battery volts and state of charge. The battery is reckoned to be full at just over 60V and empty at about 51.5V. But I can be showing 60 V but battery SOC can be anything between 80 and 100 %...
  2. R

    Solar PV Export, 3.68kW or 16 Amps

    Having observed my export output parameters I never get to 16 amps because the voltage where I am is around 248/9 volts during the day and is about that regardless of whether there I am exporting or not. Then at tea time drops to about 240V to rise again at night to about 245V so could get away...
  3. R

    Hedge trimmer cut through lead

    The other day inadvertently cut through the cord on my electric hedge trimmer. There was a visible spark. It was on an RCD Machine doubly insulated so no earth terminal. Would have expected at least the MCB or plug fuse to have tripped as the cutter would have shorted the L&N but it did not, so...
  4. R

    Solar Powered EV charging

    As soon as we get small BEV's on the market with a bit more range we intend to get one. We have a 6Kw array and 10Kw battery. I wondered if having this set up would influence the type/make of the 7Kw charger we should specify. I would be keen to be able to charge the EV from the excess solar...
  5. R

    Solar pv batteries distance to CU

    On a ground mounted solar pv array supplying a hybrid inverter and batteries housed in a suitable weather proof structure ,  is there a limit on the distance from the batteries to the consumer unit. (It is assumed that the supply cable between the batteries an CU is suitably rated)
  6. R

    SWA cable alongside cat5e

    I am considering a quote for a 6kw solar pv ground array with battery storage 2 x 4.5 kw packs. The installer had requested I install 16 mm2 SWA from the array to the house a distance of 70m . I have already installed the ducting so would not be an issue. I have also been asked to run Cat5e...
  7. R

    Solar PV voltage drops DC AC

    Had quotes for 6.4 Kwp  solar pv ground based array with Solar Edge 5Kw inverter. From the array to the CU is about 60 M underground duct already in place. There is the option of having the inverter indoors close to the CU which will be DC from the panels (which is what installer has quoted for...
  8. R

    IP 66 Motion detector

    I live in an area with exposure to high wind driven rain close to the coast. Have trouble with outdoor lighting failing and need to find something more suitable that will withstand the weather. I have identified "marine" LED floods but need an IP66 motion detector to drive them. Anyone any...
  9. R

    Wiring zones

    I need to run a cable from inside to outside but have an 800 mm stone wall to go through. However the doorway would provide a good route. The doorway entrance is 800 mm deep from in to out and its "ceiling" is 2250 mm above floor level. If I run the cable at the top of this wall i.e within 150...
  10. R

    Plasterer's Request Ceiling Holes

    My plasterer has requested I do not make holes in the ceiling for down lights until ceiling is plastered. Issue is I cannot get into the ceiling void as upstairs floor has underfloor heating. ( Ceiling is not yet boarded out). Is there an easy way of finding the cable terminations.? I have...
  11. R

    Solar PV supply

    Have had 2 quotes for solar pv 4kw on the ground some 90 m cabling from the CU. One installer said the inverter would be housed in a box next to the array the other would put it indoors next to the CU. My gut feeling is that the external option is the best as I don't think sending DC 90 m to the...
  12. R

    Lost rope end

    I have inadvertently lost the end of a rope threaded through 50 mm civils ducting length about 11 M with a 90 deg elbow either end. Run is straight. What is best way of getting the rope through. Have a couple of sets of flex rods but the end gets stuck on the joints in the pipe. Have got a...
  13. R

    Ammendment 3 Consumer Units

    I am really puzzled as to the "solution" to fires in consumer units that have triggered the installation of non combustible units. As someone who worked in an industry that had great hazard potential to both product and people the emphasis was on prevention and we had extensive training in...
  14. R

    Floods And Electrics

    Fortunately I have not been too troubled by the flooding issues that have plagued many in parts of the north west. What I am curious about is why have there been no reports of electrocutions. I understand how the protective devices built into installations offer protection but  what happens when...
  15. R

    Cooker Outlet And Induction Hobs

    1.Where is the best position to locate a cooker outlet for a built in oven. 2. The OSG states that a 30 or 32 A circuit is ok for cookers rating up to 15kw (which is a pretty high load) the circuit no doubt accounted for by diversity. However does this still hold for induction hobs e.g 7.2 kw...
  16. R

    Safe Zone And Dry Lining Boxes

    A dry lining box only has cable entries top bottom and back not side. How much wider than the box height can a safe zone be  to allow a horizontal cable run to enter the box at the top or bottom. The "extra" only needs to be the width of  the cable. It is not possible to come into the back of...
  17. R

    Torque Screwdrivers

    Read an interesting article on using torque screwdrivers to tighten electrical connections. As someone who is very much into doing stuff right I was very much in agreement with what was being said. One snag though  I do not remember ever seeing any recommended torque settings for any electrical...
  18. R

    Stripping Outer Sheath Flat T&e

    Can anyone recommend a wire stripper that can cleanly remove the outer cover of T&E without damaging the insulation on the inner cores. Thanks
  19. R

    Dead Testing Led Lighting Ciircuits

    How do you  go about dead testing LED lighting circuits when you could have several e.g. 10 or more on the same circuit in a room?. In the old days of wire through ceiling roses you may have had maybe one or two roses to a room. I suppose with the GU10 type LED you just plug your adapter into...
  20. R

    Hot Cable On Fan Heater

    I have a 3 kw Honeywell fan heater with a moulded plug. After running for about 15 mins the plug gets hot as does the cable emerging out of it. Measuring with an IR  thermometer it reads 40 C on the plug back and 60 C on the cable outlet. Many years ago I had a similar problem with a...
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