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  1. B

    Inverters for 150 kWp Photovoltaic

    Hi there! I'm new in the forum. This time I bring a question about inverters. I was hired to oversee the Electrical Installation of a public building in East-Timor (South East Asia). As you can imagine, this location is wonderful for a PV installation, with 340 sunny days a year. I have...
  2. 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 ?
  3. marconi


    I have spent some time reading into PV panels and inverters while trying to help with a current post on nuisance RCD tripping at a PV installation on a farm. I happened upon this technical paper which explains capacitive leakage currents from PV arrays and the trouble they could cause...
  4. S

    I'm sure there is an easy answer!

    All I want to do is sell coffee!! In short ... I've had a mid life crisis and bought a catering van. It has a full size domestic fridge onboard. I need to keep milk cold from home to event site. I'll hook up at home and chill fridge till I leave. Am planning on using an inverter to keep fridge...
  5. A

    SolarEdge inverters failings

    Hi guys, first post so please go easy on me. I had a 4Kw solaredge system installed few years ago, all was well until pigeons started nesting under the panels and starting big mess. For years they grew in numbers. I got a roofer who installed black wiremesh (he called it hedgehogs, the stuff...
  6. Stuart Houghton

    Export Limitation

    I received a call from a person who was not a customer of mine asking to connect up his 8 kW PV system. Its a new build and the modules were installed when the scaffolding was up, this was several months ago. System is 2 x ABB PVI 3.6-TL-OUTD inverters connected to 32 x 250 watt modules. The...
  7. B

    Off grid earthing system

    What earthing system should be used on an off grid install with a solar inverter, wind inverter, battery backup inverter and a 4.5kW floating earth generator?
  8. I

    Ground Fault Detection Interrupter (GFDI)

    Some inverters are provided with GFDI and some are not. Is this a regulatory thing dependent upon the country of use intended for the product?
  9. S

    Queries on a new PV installation

    Hi all. I am looking for a 3rd opinion on a recently completed install at a friend of a friends property. I am PV installer (17th edition, Part P, 2394&2395, NVQ3), I did not install this system. - The property has a 3 phase supply. - The electrician has taken 25mm tails from the main fuses...
  10. S

    Battery Storage And Uk Regulatory Compliance

    Hello all, I am thinking of adding battery storage to my existing setup to increase self-consumption and provide backup for power cuts. Currently I have 16 x 230W panels feeding 2 + 2 kW StecaGrid inverters installed in 2011. If I were to add for example a Victron MultiPlus 48/3000/35-50 in...
  11. S

    Tigo, Solaredge or Blackmagic?

    Which optimisers shall I use? Any advice based on your real-world experience?
  12. jason121

    Bad Installation

    I was asked to write a report today regarding a poor solar installation. There are two inverters. The left is wired out the dead side of a shared AC isolator while the other inverter is wired of the live side (from the meter ) feeding another AC isolator. In my opinion one inverter would feed...
  13. N

    Help with picking a solar solution

    Hi All, thanks for taking the time to read this!! I'm currently trying to decide on a solar PV system to get installed on my house. I've a budget of £9K and whatever I don't spend on the solution will just get paid off the mortgage. I'm limited to 16 panels/4kW. Roof faces SE and there isn't...
  14. loplug

    Solar farm earthing

    Been doing some work today on a solar farm , from the subs there are 95mm 4 core Alu cables running out to the arrays where there is a box that splits the feed between the 2 inverters. Now the cable that comes from the sub is connected to the neutral bar at the mccb panel and marked with blue...
  15. W


    I'm keen to install some solar PV panels but am amazed at how different the quotes and specifications that we've had have been... After getting 4 quotes back in Feb - when we weren't in a position to proceed and I'm now considering quote no 5... The latest quote - which (I think?) seems quite...
  16. M

    sma sb1700 over voltage ac? Help pleaseeeee

    Evening all, I got called out to a job the other day were the customer has 2 x SB 1700's in the loft. The complaint was that the inverters cut out every so often, he knows this because he constantly monitors his sunny beam device. The error registered as unknown and to contact the installers...
  17. O

    Volt drop question

    Hi all Just had an enquiry for 50 kw ground mounted PV system, the proposed system is to be connected to a three phase supply In an industrial unit, the ground mounted array will be approx. 200mtrs away from the unit. The inverters and generation meters are to be mounted next to the...
  18. L

    Three phase solar

    Starting a solar three phase project, how do you connect the generation meter from 8 three phase inverters, or will each inverter have it's own g meter? Appreciate a response
  19. C

    Solar PV install on farm

    A farm I have done some work for are having an array installed by a third party but I have been asked by the farmer to do some additional work not included in the PV install. At present there is a PME supply into a workshop from which a 25mm 2 core SWA has been buried underground and run to a...
  20. J

    Solar PV panes and power cuts

    Hi I can understand that, during a power cut, an inverter connected to a PV array needs to shut down to prevent maintenance workers on the grid but I don't see why the inverter cannot still continue to provide domestic power. Surely all that is needed is an isolating relay which can distinguish...
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