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  1. A

    Safely disconnect battery string

    Hi All, I'm moving into telecoms and looking for some help on disconnecting battery strings. I come from a domestic background so have not got involved in battery strings before as I never touched solar. My questions is thus: How do you safely disconnect a battery string that is housed in a...
  2. B

    Help with an Outdoor DIY Light String (UK)

    This is the setup I am trying to put together. No idea what to buy in terms of parts. The bulbs will be low watt patio style incandescents. I am in the UK and these will be for outside. Just want to make sure I don't electrocute myself. The lights will be hanging - not levitating like in the...
  3. S

    Which Orientation for new string?

    I have 1.2 kWp on my small unshaded south facing roof, with no room to expand.... I'm about to add another 1.6 kWp on my flat roofed extension at the back of the house in a separate string to the 2-MPPT inverter. This roof is a west-facing aspect, so the panels will be largely shaded until...
  4. H

    I have a 12v 90ah leisure battery and 2 sets of 25 G40 Bulbs String Light but need a new inverter which one is best please

    THIS IS FOR ELECTRICAL NEWS ONLY
  5. U

    Calculate Heat dissipation of string inverters

    Hello!! I am using 2 ABB 100kw string Inverters (ABB PVS 100-TL) in a single room. Can anyone assist me in calculating the Heat dissipation from these string inverters. following are the Input voltage information for both the inverters Inverter 1: Vin=720V DC at STC (for max string size of 18...
  6. S

    two string inverter only shows reading for pv1 shows zero for pv 2

    hi i have a 4kw samil power solar river inverter. when i log on it reading for pv1 shows zero for pv 2 i checked both strings with multimeter and both show simmilar readings. just to note its like this even when im getting over 3kw
  7. T

    Power LED string lights with base socket adapter?

    Hello forums, Total novice here! I want to make sure I'm doing the right and safe thing when installing outdoor string lights. The specifications to these lights are included here: The issue I am having is how do I power them? I would like to be able to flick the backyard patio switch to turn...
  8. N

    277 Volt lighting. Y system. I have a string of lights out in a hallway.

    277 volt Y system lighting circuit. A string of lights out in a hallway. Have 277 to ground on both my hot and my neutral. Have only 15 volts between my 277 hot and 277 neutral. This was discovered Friday afternoon, Co. does not pay OT so its my unwanted challenge for Monday. Will look at prints...
  9. J

    How does one HALF CUT solar module affect the other modules in the string when it is partially shaded?

    Hello everyone, I have a fairly technical question. I wonder what will happen to the efficiency of the PV system when we shade the bottom of one solar module (HCC) connected in series? Will the performance of the entire string decrease by half because only the top works in this module? Isn't it...
  10. P

    Festoon, string lights how good are they

    Evening all. I just wondered if anyone had knowledge of these types of lights. I don't want the cheap outdoor Xmas lights but proper lighting harness. I've seen the cost for 50m around £125 without lamps. I'm wondering on their durability as I wish to use them for my garden on festoon poles
  11. C

    One string or two?

    I'm relocating a 16 panel system from a field onto a barn roof. Currently, there are 16 panels, wired as two strings into an isolator. From the isolator there is a two core 4mm SWA which goes underground (about 150m) to the inverter in the farmhouse where it's wired into one of the inverter's...
  12. T

    How long is a piece of string (silly pricing question)

    Afternoon all, I realise that this is very likely a silly question but I'm only looking for a very pricing guide from a professional. I moved recently and as a result no longer have a garage. I'm building a workshop which I eventually want to get connected to proper mains electricity rather than...
  13. M

    LED string lights conundrum

    The 8 way controller stopped working so I removed it, I thought I would just have static lights, the transformer is at the plug, supplies 3v. The control box had 2 wires in from the transformer and 2 wires out for the lights. I joined the wires with a connector block hoping that would do the...
  14. S

    String Voltage

    Hi just about to install my first solar system. Been a commercial electrician for 29 years but no PV experience. After pushed away from Micro inverters by advice from people on here I decieded on Solaredge. Have sized my system on the solar edge designer software. Now thats telling me I need a...
  15. C

    Replacement panels for a defunct manufacturer

    Afternoon all We have a couple of damaged Day4Energy 240w modules to replace and so far as I can tell this company no-longer exists. Well not in the same form as it did a few years ago anyway. A new company has taken up the technology but are not producing these panels. They have suggested...
  16. M

    Shower draw string power supply

    My showers draw string power supplys cord has stopped working luckily in the on position I opened the casing up and when I looked inside the brown live wire had a green kind of mouldy looking end and the insulation of the wire was blistered. Is this the sign of something more sinister I have...
  17. W

    Larger 6kWp+ domestic install before the FIT cut

    I'm not an electrician, just a householder (though do work in an area given a kick in the family jewels by government decision last year). I am technically minded so want to understand that proposed systems are worth the spend. I have a decent south facing roof space that can take around 25-27...
  18. S

    Building Control Issue

    We've just installed a new 3-phase PV system onto a rebuilt community centre, where the pan is to bring in a new 3-phase supply. The new supply has been delayed, and the clients want to get the building up and running. We can easily use a single phase conversion kit in the DB to provide power...
  19. N

    PAT Testing American string lights

    Hello, I wonder if somebody might be able to advise me. I'm intending to use a set of outdoor American string lights in the UK. They are fitted with an American 3-pig plug and 110v so I need to use a step down converter. Is it possible to get this sort of thing PAT tested? Many thanks...
  20. Rincewindwiz

    LED ight string and Voltage Detector

    Hi All, I have a broken LED light string (I've two actually, one embedded in an Xmas tree and one standalone) . It seems these are wired in series so I presume that one or more LEDs are U/S. The challenge is finding the broken LED(s) and then what to do with them. I was prpposing to simply...

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