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Our picks
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Powerforum Giveaway
hoohloc posted a topic in Forum Suggestions & Support,
Just received my gift today and so excited to give it a try. Thank you powerforum 🥳-
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- 2 replies
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Energy-Jason, -
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Please Rate Our Service, it assists us greatly!
Energy-Jason posted a topic in The Powerforum Store,
Hello All!
If you have made a purchase from the Powerforum Store may ask you to please rate us on google reviews: HERE
Your rating helps us tremendously.
Sincerely
Jason-
- 1 reply
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Energy-Jason, -
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Need som help from the vast knowledge in this forum (Kodak OG 5.48)
DieITou posted a topic in Starting In Solar? Feel free to introduce yourself,
Hi everyone.
Need a bit of advice please on the way forward with current install with the max amount of panels I can add.
Currently the system is about a year old. Kodak OG 5.48, 8x Canadian 365w KuMax panels (8s) , 4.8kwh Shoto Lith.
Specs on Inverter: Max PV 5KW, MPPT range 120-430 VDC, max VOC 500 VDC. Not 100% confirmed but max input current on one or two sites 18A
Panels spec on 1000 W/m2: Pmax 365W, Vmp 39.8V, Imp 9.18A, Voc 47.2v, Isc 9.75A
The system is running great, powering everything on essential side, stuff left on non-essential is geyser and oven (got a gas hob). Got a plan in mind for the geyser so thats why the question regarding more panels and helps a bit with overcast.
A friend of mine who installed the same time as me and his panels are out of the same batch as mine is planning to change his 6 panels he has to 450w+ panels.
At last I can get to the question. I'm thinking of taking over his panels and maybe running a 6p2s ( 4.38Kw 18.36A, VOC 283.2v) or 7p2s (5.1Kw, 18.36A, VOC 330.4v) configuration. but with the series config I'll be pushing the input current to 18.36.
Any input will be much appreciated. roof real-estate is not a problem can accommodate parallel strings and is pointing 357 degrees (N)
Thanks-
- 6 replies
Picked By
Energy-Jason, -
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ZN-Shine 440W Mono-Crystalline, Double Glass Panels
zathras posted a topic in Starting In Solar? Feel free to introduce yourself,
Goodday all.
I have been lurking in the forum for a while and am considering a grid tied installation.
I would like some advice for or against if anyone has an opinion or experience with these panels above.
I had never heard of them until 2 days ago, but they do seem promising based on what I was able to find from web research, YouTube, etc.
They were suggested by the installer.
See attached link, http://www.znshinesolar.com/product/zxm6-nh144/
The installer I may go with has done some big commercial installations, formed his own company and has done an installation at a family member's house and at his colleagues houses. So comes with a good reputation.
He suggested the Deye 5kw inverter, but I am leaning towards the sunsynk based on everything I have read here.
Other informative details: single phase, prepaid meter, 500kwh monthly usage, johanesburg location, solar geyser, gas stove. Have a separate Ellies powercube ups for router and fibre. Also have the mecer 200ah llifepo4 second Life battery and small 600w inverter to charge laptops for working from home (this was my first trip down the power backup rabbit hole :-). Would like to keep the essentials going during loadshedding and subsequent outages.-
- 2 replies
Picked By
Energy-Jason, -
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Best electric geyser replacement
Petrie posted a topic in Water Heating & Pumping,
I'm on solar now for 6 months, but geyser (200lt, 3kw) is still on Eskom. I want to go completely off grid. Which is the best geyser alternative? Solar, high pressure/low pressure, retrofit or gas? Considering purchase price etc.-
- 68 replies
Picked By
Energy-Jason, -
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By phalaborwa · Posted
About a year ago we needed security lighting for our small guesthouse during night-time black-outs. I went out and bought five 10 amp spotlights(750lm), which I mounted on top of the roof to cover all the areas which needed lighting.(+-50Amps/hr) Bought an Omega opw-800 Inverter and 2x 80Amp/hr deep-cell batteries with 2x 150 Watt 18volt solar panels in parallel for the 12volt 160Ampere hours. Bought an osaka charge controller(30amp) for R310.00 to charge the two batteries (pwm). Built an automatic switch, to switch on the inverter during night-time load shedding(80Amp 12volt relay with normally closed contacts) powered by a 12volt cellphone battery charger. (Just have to remember to switch off in the morning for power-cuts during the day.) This worked fine until we realized that our guests needed to shower after work and then it got more complicated ! 😉 I had previously installed a 2500litre jojo tank with a 750Watt booster-pump to supply water during shut-offs(they stop the pumps supplying water to town). Now this 750Watt booster-pump was to big to handle by my 800Watt inverter and would not run it. Went out to the Hardware store and bought a 270Watt booster-pump and installed. Bought a 4000Watt pure sine-wave inverter from Takealot (they deliver free of charge to your doorstep) -
Thank you for the response and clarification regarding the different voltages per string. Option 2 is the most straightforward at this time, so I will be adding additional panels of similar spec. To clarify, if I do not find the exact same panels (the most important would be a similar Vmp in the new panels), find panels with similar specs and ensure that I connect the different but similar spec panels in 3s so that the total VMP per string is within 5% of each other? Another noob question, although I most properly know the answer. I have been using the VOC of the panel (38.6v x 3) as my calculation to ensure I do not exceed the Max PV Array Open Circuit Voltage of the inverter (145Vdc). If using the panels Vmp (32.4v) as a calculation, the max voltage for the current setup 3s is 97.2v. Adding a 4th series panel, the Vmp (4 x 32.4=129.6) would be just below the max MPPT voltage range, but the 4 x VOC would exceed the inverters max PV Array open circuit voltage. Am I correct that adding an additional panel for a 4s setup is not a option? -
Thanks Iss The attachment is unavailable. With regard your other post on this topic, I read it thanks, and have a question. You mentioned the following. “cross-over cable 1&2 to 7&8 as below. 6 other cables are straight through. Meaning from above img. Orange to brown remains in that order” So pin 1 goes to pin 7 and 2 goes to 8? The diagram on your post seems to show 1 to 8 and 2 to 7 (unless I’m reading it wrong 😃) Thanks -
Wanted Grid Tie Inverter, for feeding back to the grid. Maybe someone have one for sale? Any size from 1kW, prefer lower startup of 90V/120V but can work around that, would like two MMPT's, but also not serious. Anti-islanding protection nogals important. Will also look at small full bidirectional hybrid at a low price. -
Thanks This didn’t work for me assuming it’s a straight cable that you used.
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