ceaser:


https://mpoweruk.com/lithiumS.htm

I don't know if I'll be banned for this link. But it's the link to those screenshots I uploaded above.

spartacus11:
Wow i think i am more comfortable with Lifepo4. Still trying to learn more about putting them together, and appropriate way to charge them and also about the balancing issue

Need to learn more about the balancing, i will like to ask is BMS actually needed on a lifepo4 set up, if you charge and discharge appropriately? I didn't see this guy using any


https://www.youtube.com/watch?v=E4pN4DVPOcY

GeorgeD1:


Hello essegis,
I see niyi and JUO already done justice to this. Sorry I'm just seeing your post now.
Yes, I'm using the tristar meter hub which combines my total solar harvest from 4 charge controllers...
For cable size, I have 3pcs 75mm diameter cables feeding in from the battery bank to the inverter...
As for number of panels/ratings, that would be 48pcs, with 24pcs 315w Solarworld panels from kiekie and 24pcs 330w Canadian Solar from Gennex...

babaegun:


@adrusa
Its really a shame that Felicity will just come out with such bogus ratings to deceive the whole world. Why not come out with the actual things. People who will buy will surely buy. And in saner climes, they would have withdrawn their licenses. We should not encourage such things in Nigeria.

I was tempted to buy too but after speaking with one of the distributors, he confirmed that the 48V/200AH is actually 6kwh and not 7.5kwh as advertised. I told him point blank that they should stop deceiving people with "mouth watering offers". The last straw that broke the camel's back for me was that he said their BMS cant be monitored that they are still developing/researching to make it better. For me, that is a No No as I love to see data and lithium batteries shouldn't be taken lightly. At the right time, I will invest in premium ones that will give me all that.

essegis:


How does 75mm cables even enter inside CC terminals, jah Jehovah.

essegis:


Without BMS you will need manual intervention. This becomes tiring over time. Except you size your bank such that charging and discharging always falls within the wanted parameters.

There are a lot of guys that actually don't believe in BMS as its the weakest link in the Lithium chain. Except of course you get money for Batrium and the likes. I wasn't dey there oo.

spartacus11:


Yeah the guy on the YouTube link talk about balancing, and he said onece in 4-6 months

But i was thinking if i stay within the allowed charging and discharging capacity will that be fine without BMS?

Also it seems like Smart Chargers for lead acid battery will also do better in charging of Lifepo4, the highest Volts on my smart charger is 14.8V the amp the highest amp is 8.6A for 12v and about 4A for 24v

Most of the voltage i have seen for lifepo4 is 14.4V my question is will the 8.6A be enough to charge a 12.8v 105Ah bank of Lifepo4

mctfopt:
Anyone know of a good 5kva servo stabilizer?

ojeysky:


8.6A will charge an LFP it's just a matter of how long it will take to charge. You should get a more powerful charger, i think @Juo said he has a 40A.
Fyi I have a 50A 24v

ojeysky:


If you can up your budget to 10kva then get a dunamics stab.....it simply rocks!

spartacus11:


Yeah the guy on the YouTube link talk about balancing, and he said onece in 4-6 months

But i was thinking if i stay within the allowed charging and discharging capacity will that be fine without BMS?

Also it seems like Smart Chargers for lead acid battery will also do better in charging of Lifepo4, the highest Volts on my smart charger is 14.8V the amp the highest amp is 8.6A for 12v and about 4A for 24v

Most of the voltage i have seen for lifepo4 is 14.4V my question is will the 8.6A be enough to charge a 12.8v 105Ah bank of Lifepo4

ojeysky:


8.6A will charge an LFP it's just a matter of how long it will take to charge. You should get a more powerful charger, i think @Juo said he has a 40A.
Fyi I have a 50A 24v

ceaser:


I think it's still the use of busbars that ease things. GeorgeD1, Omolyunade, earthrealm et al with massive systems, how does one do it @ bolded?

ceaser:


Any spare 24v LFP charger for sale?

Someone that just procured a 24v pack might be interested though not sure yet.

mctfopt:


Thanks a lot. Don't they have it at 5kva?

ojeysky:


Perhaps they have but when I last checked, 10kva was the least I saw

ojeysky:


I still have 2 units available for sale

earthrealm:


Hahahahahaha.
It must be another earthrealm you mean..and not my own.
I am not even near havin a massive system. I just have several small systems spread across, f.like 5 systems, the biggest of wch is just 3kw array and 8 x 12v 200ah bank.

To your question, the only way i fit in big cables into cc is to trim the end of the cable to the size that can fit into the cc,, am sure there are cable resucers in the market for people who would want a more scientific approach

ceaser:


Sorry I didn't get the price?

ceaser:


I think the exciting thing about this is that lithium DIY will likely take the centrestage such that people will just source for premium cells, source for premium BMSes that provide monitoring capabilities like we currently do with charge controllers, then tinker with configurations like you will with SLA batteries.

For Felicity to still be stammering about "researching" into that is disappointing. Even Bluetooth & WiFi enabled BMSes are becoming widely available that their lithium batteries by now should be communicating with their premium brands of inverters. But do they even have such capabilities in their charge controllers yet sef?

ojeysky:


https://www.nairaland.com/390522/solar-energy-complement-fta/754#90070159

adrusa:


Luckilly, Lithium battery is not difficult to maintain. It is even easier to maintain than Lead Acid batteries. All that is required is to prevent overcharging and over-discharge. The most basic BMS is going to do that effectively. Some will help you with balancing in addition. A good charger with proper settings can also do the job.

essegis:


I want to be like you when I grow up oo. Abeg come and show us the way.

How does 75mm cables even enter inside CC terminals, jah Jehovah.

ceaser:


I think the exciting thing about this is that lithium DIY will likely take the centrestage such that people will just source for premium cells, source for premium BMSes that provide monitoring capabilities like we currently do with charge controllers, then tinker with configurations like you will with SLA batteries.

For Felicity to still be stammering about "researching" into that is disappointing. Even Bluetooth & WiFi enabled BMSes are becoming widely available that their lithium batteries by now should be communicating with their premium brands of inverters. But do they even have such capabilities in their charge controllers yet sef?

Justin288:


I rather do DIY than buy some of these fancy lithium packages. I first learnt about lithium on this group 10months ago and started researching and getting all the devices I needed gradually. Last week able to setup my 15s120p. 230Ah tested.
With plans for 5 rows of 15s expansion.
At least I know what am dealing with.
Covid 19 Lockdown helped sha.

adrusa:


Wow! That's a lot of lithium ion batteries!
How much did the batrium cost and where can I get to buy?

adrusa:


Luckilly, Lithium battery is not difficult to maintain. It is even easier to maintain than Lead Acid batteries. All that is required is to prevent overcharging and over-discharge. The most basic BMS is going to do that effectively. Some will help you with balancing in addition. A good charger with proper settings can also do the job.

For the tinkerers among us, monitoring is something we will like to do. It will even be better if the battery parameters can be fed into automation and data logger like Emoncms and Home Assistant. That is why I paid for some smart BMS on Aliexpress, but I'm not totally happy with it. The software is clunky and I couldn't get the smartphone app. I'm open to any advise on a smart BMS that works. I ordered ANT-BMS and I'm hoping I will be luckier with that.

GeorgeD1:

Lolz. Go ahead bro. Nothing do u

GeorgeD1:


Lolz. Bros, na your lithium batteries i go come carry as replacement

earthrealm:

.....

ihave observed 1804w from a 1680w (6 x 280w yingli panels) array, about 2wks ago, dropped to 1795w and held steady for over 3minutes.
this was hooked to a 25k 60amps powmr cc