Saipro:

Congratulations on rolling up your sleeves and getting into the thick of things. That's my preferred route. It also simplifies maintenance and troubleshooting.

I'll attempt to help with my little knowledge base. In order of the questions,

1. You're safer going with ImP rather than IsC in your calculations.
For a place with overcast skies, your instantaneous best recorded (might bel lesser than the best seen) is great. Expect no more and you wouldn't be disappointed; actual NOC values are usually lower ... much lower (assume 73 - 78% of ratings).

Oversizing your array wouldn't be much of a hassle so long as you do not exceed the rated VoC of the FlexMax.
18 panels would be 4.5kWp of PV array. While it might not be the "cost effective" array size (depending on your battery bank size), if it makes economic sense to you, you're alright. Your FlexMax would hardly see beyond 3.5kW from that array size anyway.

2. I'm surprised there ever was a time your FlexMax and the Must inverter ever agreed (except on lower voltages. That, indeed, is an oddity. However, a 2V voltage drop suggests either significant loading of the inverter (based on battery bank sizing, again) or a drift in the calibration system of either (or rarely both) inverter or CC. I suspect you've learnt to place more loads on it even as you've discovered you at times have surplus power generation. A good voltmeter should inform you on which to trust (my money is on the FlexMax again).

3. Mine shows 100% on absorb voltages and 86 - 88% on float voltage (both the 24V & 48V Must inverters). Yours apparently recognises float as 100%. A wee bit preferable to mine but neither is accurate. Do not rely on it, ever. There's more to capacity estimation than mere voltage readings as it dynamically changes with loading percentage. The load % counter/meter is however pretty accurate across all models I've seen. It's the only thing you can really count on - up to around 35 - 50% loading. Right there (and beyond that), the inverter becomes more "efficient" (a paradox). At that point however, some older models might show waveform distortion.

Solar Industry of India -

I would like to introduce Indian solar industry. India is also growing in rooftop segment for residential and commercial segment. Here, people are install solar system for home and business and their capacity is about 3 kW, 5 kW and 10 kW. Loom Solar is one of the India's premium solar brand store for all types of solar energy products, such as solar panel, solar inverter, solar battery, solar charge controller as well as solar accessories. The customers can easily compare and buy solar products from their phone. Read more details at https://www.loomsolar.com/collections/solar-panels

JUO:
they are same in terms of performance but not sure of the app

Godliftedme:
Has anyone used this battery before, what's your user experience with the battery

Trippledots:


Really? Wow

And Whats the comparism like in terms of price tho?

JUO:
Almost half the price

kiekie1:
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Prag inverter 3kva 24v ....N145,000
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JUO:
Almost half the price

Trippledots:

JUO:
Almost half the price

NiyiOmoIyunade:
Bear in mind you are getting the bare-bones product at half price - solar charger performance is virtually the same but the extra bells and whistles e.g firmware updates and [remote] monitoring and integration are not there...

You will have to be innovative and pay extra to integrate all these value added features.

So it depends on what matters most to you.

Trippledots:


Not bad still. Having to diy the "bells and whistles" will even improve my techy ability and skills.i won't mind that.

saint2ace:
Seems this thread has gradually transformed itself to a market place. Can we have less of the adverts and more inputs. No one is saying don't advertise but for God's sake maybe an advert a page so we don't lose the essences of the thread.

My 2kobo sha

NiyiOmoIyunade:
That is the spirit my Oga.

Personally I was a skeptic and thought little of a 'Chinese clone CC' until I reluctantly bought a test unit of the 60a Victron clone Fangpusun from JUO and was pleasantly surprised to find it giving almost the same yield as my MorningStar.

Of course my brand loyalty (read MorningStar fanboyism ) prevailed but I have since bought and used many more units for budget client installations and no regrets so far. Those clone Fanpusuns pack one helluva punch in a compact form factor and they track well too.

makavele:


True talk; put out the same charging stats as my Morningstar . . .

Namzy:
Just discovered this wonderful device called tds meter that I bought from AliExpress it measures TOTAL DISSOLVED SOLIDS in water. This is for those using fla batteries that needs to be topped up. Distilled water in ideal solutions has tds level of 0. However I learnt from a forum that anything from 5 and below is ideal. I have tested different water sources in my house, my tap water is tds level 8, Eva water is tds 36 but my event sachet water and delina glory water measured 4 and 3 or 2 respectively. I will use them for topping up. Meanwhile you can also use it to check whether the so called distilled water is really distilled you know our people. Pics from another forum and from my check of event and delina glory pure water. Some even use it to check for purity if drinking water but that's an area of controversy.

Namzy:
Just discovered this wonderful device called tds meter that I bought from AliExpress it measures TOTAL DISSOLVED SOLIDS in water. This is for those using fla batteries that needs to be topped up. Distilled water in ideal solutions has tds level of 0. However I learnt from a forum that anything from 5 and below is ideal. I have tested different water sources in my house, my tap water is tds level 8, Eva water is tds 36 but my event sachet water and delina glory water measured 4 and 3 or 2 respectively. I will use them for topping up. Meanwhile you can also use it to check whether the so called distilled water is really distilled you know our people. Pics from another forum and from my check of event and delina glory pure water. Some even use it to check for purity if drinking water but that's an area of controversy.

Namzy:
Just discovered this wonderful device called tds meter that I bought from AliExpress it measures TOTAL DISSOLVED SOLIDS in water. This is for those using fla batteries that needs to be topped up. Distilled water in ideal solutions has tds level of 0. However I learnt from a forum that anything from 5 and below is ideal. I have tested different water sources in my house, my tap water is tds level 8, Eva water is tds 36 but my event sachet water and delina glory water measured 4 and 3 or 2 respectively. I will use them for topping up. Meanwhile you can also use it to check whether the so called distilled water is really distilled you know our people. Pics from another forum and from my check of event and delina glory pure water. Some even use it to check for purity if drinking water but that's an area of controversy.

NiyiOmoIyunade:
And the MorningStar overstates its current reading slightly by 2% to 4% just like other premium CCs are wont to do.

The Fangpusun current readings meanwhile are spot-on accurate.

Over the course of a day, the MorningStar will spit out more KwHr of yield though because it typically absorbs for longer and also puts out more current during it's Absorb and Float phases - the Fangpusun absorbs based on an algorithm copied from Victron where the length of Absorb is based on something like the last known battery DoD reading before charging started and time spent in bulk - with light DoD, the absorb time can be as short as 1 hour or perhaps less.

Ultimately, I am fully confident that my MorningStars can run for 15years and above - I do not know if the Fanpusun can go that far.

NiyiOmoIyunade:
For topping off batteries you should use distilled water that you buy or make yourself.

You can get the AC condensate water (that drips out the back of the AC compressor) into a clean container and use as a cheap and clean and sure substitute to all the 'TDS tested satchet water' you are fixing to use.

You may not be able to guarantee the consistency of composition of your satchet water from batch to batch and even if, I would still rather use AC condensate water as a worst case - you can test clean AC condensate water with your TDS meter and report back to the house on what you find.

You really do not want to put the wrong fluid into your batteries as the stress, pain and cost of restitution will negate all gains.

pranil:
I recently came across a very nice document by ABB or USE of ELCB/RCCB and applications.

It is written in simple laymen terms with additional technical information for those interested.

Worth having a look as the safety in electrical installation especially Residential should be the first priority

https://drive.google.com/file/d/1fJ01G53B2PqPh1pcOxPIc4lAeCY_7gMJ/view?usp=sharing

Namzy:

Tested the ac water and tds level was 8. Will source for distilled water elsewhere

Saipro:

Pretty impressive. Kudos!

I'm in Ilorin at the moment. Can we hook up sometime?

NiyiOmoIyunade:
Hmmmmm! I have personally never done this TDS test but the very nature of how AC condensate water is generated makes me doubt the possibility.

I suspect the container used to capture the water or the AC drain pipe has dirt or sediments that are corrupting the results - if you are able, you should let the AC run well for like an hour to clean out the pipe before you capture water for the test.

I would really be happy to know as I have a lot of people (including me) who use AC condensate water for batteries, car radiator and ironing (steam).

Namzy:

Tested the ac water and tds level was 8. Will source for distilled water elsewhere

NiyiOmoIyunade:
Hmmmmm! I have personally never done this TDS test but the very nature of how AC condensate water is generated makes me doubt the possibility.

I suspect the container used to capture the water or the AC drain pipe has dirt or sediments that are corrupting the results - if you are able, you should let the AC run well for like an hour to clean out the pipe before you capture water for the test.

I would really be happy to know as I have a lot of people (including me) who use AC condensate water for batteries, car radiator and ironing (steam).

desiji:

Hello Juo are much are your roof mounts? i need for 15 Solapanels 3S5P and where can i contact you?

Saipro:


The part which baffles me is his tap water rivaling distilled water in purity. The problem with Eva water is the high potassium and bicarbonate content. Not very harmful to batteries though. It's pretty unusual to see tap water lower than 12ppm of tds and 18 - 38 is pretty common in these parts (making it suitable source water for further processing). A visit to Namzy's house to "taste" of his tap water is in order.

Saipro:

Actually, 8 parts per million of dissolved salts/solids is a wonderfully good figure and better than what most battery manufacturers recommend. I have run other tests to ascertain that 6 - 8ppm of tds is the factual value for A/C condensate. Distilled water fares better by measuring 2 - 4ppm. Well-processed deionised water measures roughly the same (I suspect the copper tubing is the source of the extra tds for condensate as I've measured from various sources using various glass and plastic receptacles).

The part which baffles me is his tap water rivaling distilled water in purity. The problem with Eva water is the high potassium and bicarbonate content. Not very harmful to batteries though. It's pretty unusual to see tap water lower than 12ppm of tds and 18 - 38 is pretty common in these parts (making it suitable source water for further processing). A visit to Namzy's house to "taste" of his tap water is in order.