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Anyone serious about buying this I will happily share as many pics and videos as you want.

Item: Fluke 1587 Insulation Tester Age: Quite a few years. belonged to my late father-in-law. I don't have the knowledge to use this thing. Price: R5000 (I see a new one costs R19k+ at RS Components) Payment Method Accepted: EFT/Cash Warranty: 7 day personal Packaging: Has a MajorTech carry bag which is not in the best of shape, but does the job of keeping the tester secure and safe. Will obviously package nicely for shipping in a box. Condition: Used, but still works in my opinion (as mentioned I don't really know how to use the machine). Has all required leads including the one with the the "test" button on it Location: Bloemfontein Reason: Not an electrician Shipping: TCG or Postnet. On buyer. Collection: Yes. Link: RS Components Link

Thanks for the response. Just a few questions. I agree with 1 and 2. 3,4 and 5 however, if possible could you explain to me? 3. Is 23V not too low (could perhaps take the batter past 50% DOD)? 4. Highest possible is 29V. Wouldn't that make my inverter use the solar to keep charging the battery while always while it gets its power for use from the grid as my inverter is set to use solar and battery and only when solar is not available does it switch to grid. Unless grid is also not available then it switches to battery. It doesnt run from solar only. 5. Mine matches my float voltage. Should I set it ever so slightly higher or lower if it doesnt bulk charge? I however do think seeing battery voltages at 28.4 now and then. So I do think mine does bulk charge despite it being set to the same value as the float charge.

If it provides 85 amps and is 48v it is without a doubt mppt. Pwm is normally 12-24v and provides a maximum of about 50 amps.

If by PV cable you mean DC cable, then yes.

So just a final update. I had another 6mm2 cable installed, so 3 panels in parallel per set of positive and negative cables so each set of cables only has to handle a maximum of about 24-25 amps instead of 48-50. Panels are now producing 1250w quite easily. Actually want to add another set of 6mm2 cables so that each only handles 2 panels.

This is a very misleading statement, no (unless you meant 6mm and not 6mm2 cable)? It all depends on the distance. OP said his distance is 20m, so 40m with negative, at which 6mm2 cable will not be sufficient to provide even close to 53A. Please school me if I am missing the bus here.

I have Hexing sub meters in my shopping complex. When in tamper mode, they cut supply of electricity from the source.

it produced the 24 amps at 25 volts which is much less than the 27-28 it does when all 6 panels are connected. not sure if that matters? so you no longer suspect the cable thickness and its length as the problem? the inverter is rated at 50amp (max 80 amp) not 60 by the way for the panels.

I test both sets of 3 panels. They produced EXACTLY the same amount.

Just two things, panels are rated at 8.67 amp x 6 panels = 52 amps. Three panels easily produce 24 amps. So shouldn't 6 produce at least 48 amps? I will climb in the roof today and measure the distance of thd cable myself as that is such an important factor in my opinion. I have a fuse in my AC DB board for the solar panels and that is it. No combiner box. No protection at the panels in the roof. All "professionally" installed.

I missed this sorry. No he did not. But that is not entirely his fault. I bought my house from scumbag human beings who supplied me a fake COC and then left for Australia. I even out of generosity let the wife stay in my house after it was registered, rent free for a month as her flight was only a month after registration. I only discovered the COC was a fake when I compared it to what is actually in the house and the current state of the DB when the cover was off. So this electrician sorted out more or less all the disasters waiting to happen regarding my electrics in the house. So the plan was for him to come and do a proper COC after everything is fixed and my solar install is in. But now, I obviously see I cannot trust him to do a proper job with regard to evaluating my COC to standard. So will have to get someone qualified to the COC including the solar install.

Even when I enter, 27v, 45 and 46a (I do actually think those panels are cabable of doing 48 or very near to it perhaps 47) and 15m distance with 5% voltage drop, the tool still gives me 25mm2 cable required. So two 6mm2 is not adequate? Or what am I missing? Or should I think of it this way.....when I tested 3 panels on their own, I got 25v and 24amps (amps are right but volts are very low). So 6mm2 is adequate for 3 panels? If so, then another 6mm2 cable for the other 3 panels should work?

according to this using 31v, 48amp, 15m length both ways (30m total) and 3% voltage drop, I need 50mm2? so even 12mm2 is hopelessly inadequate?