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  1. R

    E bike Battery to power bank ?

    Anyone got any advice on how to convert a 37 v Li-Ion e bike battery into a 12 v power bank ? I will need off the shelf parts.
  2. R

    Faulty Danfoss 12 v fridge

    I have a Cubigel GD30fc compressor fridge which is a BD35 Danfoss with different connections on the control box, It only runs if I link out the thermostat, the compressor gets hot but there is no cooling, the fault code LED just shows a continuous light. I'm out of ideas. Is there any check I...
  3. R

    Repair a site transformer ?

    I'm repairing a 110 v 3 kva site transformer that the base cracked and all the sand leaked out, can anyone tell me exactly what the sand is there for and can I replace it with any dry sand or even just leave it out? The transformer won't be used on site but at home.
  4. R

    Can i boost my solar ?

    I live off grid, have 500w of solar panels laid horizontal on my boats roof, naturally its not producing anything this time of year, my backup 5 kw Diesel generator is waiting for repair, i use a 30 amp digital charger with it but all I have working is a small 400 w petrol generator ( with AVR )...
  5. R

    Testing an Old motor for restoration ?

    I have acquired an old British Thompson Houston 1/3 HP BKS 2410 single phase motor on a pillar drill, it needs new bearings before I can test run it, my question is can I use a multi meter to check the windings and find out if its a go-er at this stage and worth restoring ? If so how ?
  6. R

    110 v site transformer repair ?

    I was given a couple of 3 kva site transformers, both have broken bases and all the sand has leaked out, epoxying a new base on is no problem, and I will only be using them myself at home, but what kind of sand should I refill them with ?
  7. R

    Size of inverter to run freezer ?

    I have a 240v freezer that is rated at 75w I want to run from my 12 v battery bank ( solar ) can anyone tell me what size watts inverter I will need to handle the surge on starting it up, and running it ? And do basic no frills fridge compressors require any particular sine wave to run ?
  8. R

    Inverters running freezer

    I have a large 240v freezer running off a 12 v solar battery bank via an inverter, I would like to have a small backup inverter for the freezer that will cut in if the main one fails, and save all my food. Any one tell me how to do this please ?
  9. R

    Hair clippers refuse to run properly.

    I live off grid with only solar and generator power, I've been using hair clippers for years but now I have 3 sets of Wahl mains clippers none of which will run properly in any of my 3 inverters, nor a ( non inverter ) Honda generator. The motors / solonoids in the clippers run weakly and can't...
  10. R

    Wiring series parallel battery bank ?

    Just checking if this is correct wiring for series parallel on four 6 v batteries to get 12 v output. I have maximum of 30 amps of solar going in, what size cable is right for the battery bank connections ?
  11. R

    Bosch Oven doesn't want to play

    I took the fan motor off a working Bosch built in electric oven to replace it, and now the heating element does not switch on, though if I switch the mains cooker wall switch I can hear a relay click in the control panel, so there is power going to it. The only two contacts I touched were the...
  12. R

    Dirty generator power

    I live off grid, and use a generator to top up my battery bank in the winter when my solar is not producing, my inverter generator died, and I don't have the money to replace it, I'm using a back up Chinese nasty capacitor run geny, I would like to know if there is any device I can buy to safely...
  13. R

    Speed control of power tools ?

    I'm looking for a device that can plug in line with a 16 a extension cable that will control the speed of brush motors on power tools, up to a 2000 w angle grinder. I have seen PCB units on eBay but I'm not sure which one would be suitable. It would be ideal if it could be switched between 240...
  14. R

    Series parralell ?

    Can anyone confirm my wiring for 4 x 120w panels, my controller is 50 v max, so im going this layout. .

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