dinga

Just to recap.......the Sub Pump is 250W, 24V and 8A. The Solar Panel is 340W, 24V, Imp 8.84A Attached is a page from the Pump manual which recommends a single 275W Panel for this Pump. Based on this recommendation, I shouldn't need a second Panel. Could it be that I need to buy a 275W Panel to replace the current (sic) 340W Panel????

Thanks - apols but I'm struggling to understand why there is such a drop-off in Voltage between when the Breaker is Closed and Open. This morning (it was very overcast), and I got the following measurements: * Breaker Closed: Voltage +40.6V; -4.25A [172.5W] * Breaker Open: Voltage: +3.7V; -4.27A [15.8W] If there likely something else at play here??? (realise I need to go back and relook at Fruit Traders Youtube link). Is there anything odd about the Amp readings showing Negative Numbers??? Seems like you're dead right about needing another panel to deliver the 8 Amp to the pump. But if I get another one, am I still going to fall way short Voltage wise (ie. 3.7 V X 2 = 7.4V). Today's readings from my Fountain Pump [0.5HP = 370W; 24V; 13A] are also confounding - and this pump is performing well. * 31V; 3.3A = 102W. Begs the question why the low Amp reading hasn't caused any problems. Sorry to be a pest

No - I was too dumb to do that. As I said - hubris about the pontoon mounting of the panel, and confidence following the success with the fountain pump

Thanks. Must admit to being a bit at a loss as to why the pump is designed to not require a controller..... Also, my floating solar fountain pump operates direct from a solar panel, with a breaker in between.....[Confused!} So what do I need - something like these??????? https://www.lazada.co.th/tag/solar-power-controller/?q=solar power controller&catalog_redirect_tag=true Any specific recommendations given the info I've provided above? Am I correct in assuming that the Breaker is no longer required if a controller is used????

I'm pretty well ignorant of this stuff, but I don't think that's the problem. Correct me if I' wrong here.... The Specs say the Pump has * Power 250W; * Current: 8A; * Voltage 24-36V. The Panel's sticker says * 340W; * Max Power (Vmp) = 38.5V; * VoC: 46.4V * Current Imp: 8.84V I relooked at the Pump manual which says the Power from the solar panel should be 1.5 times the solar pump power ie. for a 250W solar pump, the panel should be rated 375W. As indicated above, the panel is actually rated 340W. It's only a 10% difference - could that be the problem???

1. The pump is still down the bore (I'm hoping I won't need to pull it out...). Best I can do at this stage is to attached photos of the box it came in and the following Specs from a couple of sales sites https://shopee.co.th/C.T.L-ปั๊มน้ำซับเมอร์ส-DC-12V150w-24V250w-36V300w-บ่อขนาด-3-นิ้ว-ท่อออก-1นิ้ว-i.897800305.25755007784 https://www.amazon.co.uk/NDNCZDHC-3SYDC24V-Electric-Submersible-Fishing/dp/B0C9QQYFZ2 2. There is no controller 3. I also attached a photo of the pond set-up FYI (hubris got me until I've continue to fail to get the pump working...) Any more thoughts????

PS Confirmed by multimeter!

Pretty well due south (with a panel angle of some 15-20degrees)

Tks Oracle Crossy!!! 1. Don't think so - the pump stopped operating as soon as I moved from ON to OFF - and the Volatage drop-off occurred immediately I returned to ON. 2. Yes - my new multi-meter confirms all OK at the Panel and the pump-side of the breaker (at least as far as the reduced voltage is concerned. As far as the pump is concerned. I've relied on the red wire and the tag that confirms it's the +ve lead. 3. Sh*t - maybe that's the problem... I thought I ordered the two together but didn't (there were 2 different suppliers). * Panel: 340W; Voc 46.4V; Vmp 38.5V; Imp 8.9A; Max Series Fuse: 15A * Will need to confirm from the pump box tomorrow, but looks like: DC 24V; 250W; 8A. The leads from the sub-pump are 20 metres, and some 20m from the Breaker to the panel. Is my problem the panel and pump are mismatched? If so, how best to proceed - (a) replace either the pump or the panel (assume pump); (b) any other options???? Thanks & best regards

I'm having trouble in getting a solar submersible pump to operate - it is powered by a single 340W solar panel; and I want a switch/breaker between the panel and the pump to be able to turn it ON and OFF (the solar panel is attached to a pontoon that floats on my pond - and the breaker is installed on a post close to the bore). Solved the 1st challenge when there was no power making it to the Breaker - after one bad MC4 connection at the pontoon was fixed, achieved some 39.5V at the input side of the breaker when OFF. Inadvertently left the breaker ON when the connection was fixed and water was being pumped from the bore until I turned the breaker OFF and then ON again. Pumping ceased and would not restart when the breaker was reset to ON. The reading at the breaker having dropped to 6.1V. I thought there must be a problem with the breaker so I tried another one today with similar results [initial reading of 39.7V which dropped to 11.2V after the breaker was switched from OFF to ON]. The attached photos shows both breakers tried to date - the Red being the 1st tried, and the Green being the one tried today. Greatly appreciate any & all advice - do I need just a simple switch rather than a breaker????? [seems a little odd as I installed a breaker (CHNT NXB-63) between another identical solar panel and a floating fountain pump, and all is going swimmingly (!) so far]. Thanks!

Successful Conclusion! Repairers advised the Light Blue is the -ve - call me Thomas, but I doubted that up until I connected the pump earlier in the week. Now working - good as new (hopefully): * Grey is +ve * Light Blue is -ve

URGENT UPDATE Rest Easy - seems there is ZERO Tax Risk. In a Webinar this afternoon, a very active Tax Advisor very clearly stated that, for individuals (Not Traders/Business operators), any Capital Gains on gold bullion sales are NOT assessible for Income Tax. Additionally, in the case of inheritance, the Estate would have no tax liability and that recipients would only be subject to Tax if the Tax-Free inheritance threshold was exceeded eg. 100 million baht per recipient. Very happy now about where this matter has finished - just disappointed about the confusion in reaching this conclusion.

Thanks Crossie I managed to find the Manual which advises if the Polarity "is not correct, the pump will spin in the opposite direction as it should. Water will still pump out but not to the rated capacity. ........ To obtain the correct polarity, connect the BROWN wire to the +ve side". Very useful given there is no Brown wire (only Light Blue and Grey". I'll get the Boss to call the repairers (bet they can't help much either....) BRs

G'day I just had a solar fountain pump repaired and it's been returned without its original MC4 connectors - just Light Blue and Gray electric cable wires. Appreciate which of these wires is +ve????? (it's made in China...) Tks!

True - he'd still be talking under 6 feet of concrete