NiyiOmoIyunade:
Oga Sinistrian.

Say we agree that the Fangpusun Blue Solar has the superior MPPT algorithm, you can only get worse results by feeding the superior DC output of the Fangpusun into a inferior DC Buck Converter (essentially what the Axpert is in this scenario). The Axpert will not suddenly become wonderful because it is receiving input from a good MPPT CC - your solar panels are already an excellent DC power source and I see only subpar results as the outcome of this experiment because per the laws of physics you won't be able to create additional power out of nothing - you can only convert from one form to another and there will always be conversion losses even in the best of circumstances.

While you can feed other DC sources into an MPPT CC, they are optimised to work with solar panels as the DC input and not necessarily any and every other DC source.

You need to be careful also not to damage the Blue Solar or Axpert as they present a variable and unnatural load profle to each other while attempting to do their work..

You just might release the magic smoke from your precious equipment and end this experiment in an ugly manner.

Just connect the output of the FangPusun Blue Solar to your batteries per the original design and you should be good.

mukhcech:
Good day my people... Viva FTA. Guys this is my battery and the charger information.... Pls can I get a minimal solar setup to charge this.... Our transformer don blow. Please help me mention the gurus in the house. Thanks.

My Batteries are 40ah...The real problem is getting a CC that can give the same output as the Charger. Thank you

CC Saipro

NoMoreTrolling:


Amazing.

21kwh? wow! You could have run a 1hp/780watts air conditioner for a couple of hours without breaking a sweat.

keep your rooms nice and chilly while it's blazing hot outside.

more power to you.

NoMoreTrolling:


how come at almost 25v, your display is showing battery low

mukhcech:
Good day my people... Viva FTA. Guys this is my battery and the charger information.... Pls can I get a minimal solar setup to charge this.... Our transformer don blow. Please help me mention the gurus in the house. Thanks.

My Batteries are 40ah...The real problem is getting a CC that can give the same output as the Charger. Thank you

CC Saipro

efuro:


I remember saying " Naa Me Be Dis?" The first time my diy setup hit 1kw. I had the urge to grow it as much I can through out the terrible recession time. (It was only the marketers that constantly had smiles on their faces - after all - what you buy is what you sell, and prices stayed up there except for JUO).

For those starting, do not be ashamed/afraid to post ur harvest, it is an achievement which you would have paid discos to use. The thread is a place to share successes , troubleshooting, new aspirations etc.
In response to ur request, the pix is my harvest as at 6.32pm. apart from ironing clothes once or twice a week, my harvest has been 6-8kw daily with day time requirement of 680w .

DMerciful:
So I thought when I opted for 1hp AC only to realise its up-to 1200w.The 1hp is only compressor... what about the fan that cools the radiator? What about the fan in the inside unit for circulation? Energy nor easy o

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NoMoreTrolling:


Nice setup! What are you complaining about though, if your batteries are always full by the time you get home

Since you aren't really tasking the setup during the day time, I won't expect you to see much juice unless your batteries are almost dead.

Try to run some load on it while you're home on a weekend, in full sun, like around 11-1pm. See what you get. Maybe through a microwave on or something and see.

sinistrian:
This is the best i've ever got since I purchased the BlueSolar charge controller (after following Niyi's advice and connecting the thing directly to batteries jejely )

DMerciful:
Order from aliexpress https://www.aliexpress.com/item/1pc-smart-12v-3A-battery-charger-AC-110v-220v-plug-US-AU-eu-dc-12v-lithium/32597578907.html

Oshomo12:


If you use ur battery to about 80% DoD, I will advice 200w panel 15amp charge controller and a new BMS(though u can still try the one that came with it). The battery should be back to full state of charge in about 3hrs(all other condition been equall).

Saipro:


Well, those are LiFePo4 batteries. And they're wonderful in performance. Lightweight and pack a punch but do poorly with inductive loads. Had a few units. The inbuilt BMS works pretty well. Kinda special charging needs. CC CV means CC CV in this case. Being lithium, they can go boom! when stress charged. That particular brand also seems to live for years if you avoid full discharge/full charge cycles (it's quite happy with 95% charge with a weekly top off to 100%).

Now that we've addressed their needs, I see you have 3 batteries in the picture. Not sure how that works out (2 in use and one spare? One at a time? 3 in parallel?). Whatever the case, charging all three at once without going over the top ... a single 200W panel should suffice. A single 280W panel is the optimum. Give or take (and aiming for battery longevity, a single 250W panel is the middle ground. Or a PWM with current limiting capabilities (MorningStar and Xantrex come to mind). All these suggestions presume you're charging 3 batteries and charging them at once, assuming the same state of charge for them all (lithium batteries aren't fond of imbalance either)

Whatever you do, never feed more than 5A into any single battery. Fix charging voltage at 14.4V for fastest charging or 14.2V for an absurd battery life. Your choice.

hancock:
Hi all
i have asked this question in another thread but i felt i should bring it up hear for a quicker response

Would you advice i buy a normal 3kva inverter and buy a charge controller separately or getting the hybrid inverter of the same spec?
PS the hybrid standalone inverter seems to be cheaper than the normal inverter + charge controller cost wise. Any reason why?

hancock:
Hi all
i have asked this question in another thread but i felt i should bring it up hear for a quicker response

Would you advice i buy a normal 3kva inverter and buy a charge controller separately or getting the hybrid inverter of the same spec?
PS the hybrid standalone inverter seems to be cheaper than the normal inverter + charge controller cost wise. Any reason why?

hancock:
Thanks
I read all your comments and I became more confused lol
Definitely I know there would be pros and cons for both types of inverters.
I would probably just have to make up my mind and go with either one of the two and damn the consequences
Thanks again

jarkbauer:


what are you options.

hancock:
Thanks
I read all your comments and I became more confused lol
Definitely I know there would be pros and cons for both types of inverters.
I would probably just have to make up my mind and go with either one of the two and damn the consequences
Thanks again

hancock:

I’m eyeing the Mercury 3kva 24v hybrid solar inverter
I haven’t made up my mind yet on the brand to go with for the normal inverter

NiyiOmoIyunade:
In general the charge controllers embedded in the low budget (think 300k and below) hybrid inverters are not as efficient and effective as dedicated charge controllers. You will usually get more juice from your PV panels with a quality dedicated charge controller.

If you are budget constrained then you can do a hybrid inverter for starters and later upgrade to a dedicated charge controller when you have more funds. This way you also get some redundancy in case any part of your system collapses

I see you mentioned Mercury? You may be better off with the Axpert (Zinox and Gennex) ecosystem of which you can also get plenty of free support on this forum.

If hard pressed post the stats of both Mercury and Axpert options you are considerind and the house will respond with advice and hands on experience.

hancock:
Hi all
i have asked this question in another thread but i felt i should bring it up hear for a quicker response

Would you advice i buy a normal 3kva inverter and buy a charge controller separately or getting the hybrid inverter of the same spec?
PS the hybrid standalone inverter seems to be cheaper than the normal inverter + charge controller cost wise. Any reason why?

bigrovar:
victron bluesolar or fangpusun