Namzy:


What's the recommended charge voltage for the lithium batteries

Good evening, sorry for replying now, had quite a busy day.

Just as @ Valto has responded, 27.8V for both float and bulk Thanks

@ Valto, thanks

anjilgreat:


Good day, Pls how do I reach you?

My lithium battery has arrived but we are still findng it difficult to navigate the editable settings of my ipowerplus inverter.

I'll appreciate your assistance. Thank in anticipation.

Change setting 5 to "USE", then setting 26 and 27 to 27.8 and 27.8 respectively

contease:
Hi guys,

I got a new "toy" Ashapower 80amp MPPT CC,

Anyone with me on this one?

It's got some additional technology to make the non-smart inverter smart by connecting the Inverter to it rather than connecting it conventionally to grid directly...

Still trying to figure how to get this charge controller. Pls share a link of where to get it

60A Powmr MPPT Solar Charge Controller. Comes with a free 1000V 63A double pole original Tomzn DC breaker worth at least 5,000

Price: 61,000 firm.
Resellers/Installers package: Buy at least 6 units on a monthly basis and get rebates of 2,000 on purchased quantity, payable by end of month. Terms and Conditions apply
* Repair service now available

Original 1000V 63A double pole original Tomzn DC breaker

Price: 5,000 firm

DC meter to provide 360-view of the vitals of your inverter system. It comes with 200A shunt.

Price: 10,000 firm

Namzy:


Change setting 5 to "USE", then setting 26 and 27 to 27.8 and 27.8 respectively

Okay, thanks.

Please, has anyone used Felicity solar panels? Do they perform any good?

Namzy:


Change setting 5 to "USE", then setting 26 and 27 to 27.8 and 27.8 respectively

We have been able to change the settings. Thank you very much.

anjilgreat:


We have been able to change the settings. Thank you very much.

You're welcome

Be wary of high float voltages for LFP.

For solar charging a high float voltage is okay because there are only limited solar hours in a day but if you are blessed with good supply from the utility spending several days on 27.8v will cause the cells to oxidize internally and slowly lose capacity.

Find a good middle and choose a float voltage that keeps the cells under 3.4v per cell long term after they spend an hour or so in absorb.

Namzy:


Change setting 5 to "USE", then setting 26 and 27 to 27.8 and 27.8 respectively

NiyiOmoIyunade:
Be wary of high float voltages for LFP.

For solar charging a high float voltage is okay because there are only limited solar hours in a day but if you are blessed with good supply from the utility spending several days on 27.8v will cause the cells to oxidize internally and slowly lose capacity.

Find a good middle and choose a float voltage that keeps the cells under 3.4v per cell long term after they spend an hour or so in absorb.

Please forgive my ignorance, there are lifepo4 chargers with 14.6v like the one attached, are they likely to spoil the battery too

samnaija:


Get in touch with ze,estone, he will sort you out on spd.

Thanks I think I promised him some business in the second quarter of 2023

TechGeek777:


Contact @zee,stone99 for your watts Meter

My very last post on this thread above applies.

As requested ( this is my econo setup)

1. 1 No. 60A MPPT
2. 2 No. 1.5 KVA Inverter
3. 4 No. Quanta 12V 200AH batteries
4. 2 No. Jinko 470W panels (will be increased to 3a soon, then I will have to get another and hopefully more powerful MPPT)

There are many types and designs of LFP charger with various charging algorithms.

The problem I highlighted was keeping cells at high voltages for a very long time e.g several days.

A charger that gets to 14.6v for 4 LFP cells plans to take each cell to 3.65v - the cells need to be very closely capacity and IR matched or the BMS set very lax to allow this to happen in practice without one or more cells hitting HVD early and BMS cutting off charge.

You don't want your cells or a few of them hitting HVD on a regular basis so a charger like this should have adjustable voltage so that you can back off from the HVD point (set lower than 14.6v) for your regular charging.

oloet:


Please forgive my ignorance, there are lifepo4 chargers with 14.6v like the one attached, are they likely to spoil the battery too

For the over clockers who want to unlock that last 2% storage capacity using a high charge voltage, it is more likely that you will cause permanent capacity loss by charging too high than actually gaining extra capacity - ditto for the 100% DoD folks.

Indeed LFP does not need to be charged to 100% and worst case 90% DoD is probably as deep as you want to go too. Bad things (can or tend to) happen more at the very bottom and top of the charge/discharge curve.

NiyiOmoIyunade:
There are many types and designs of LFP charger with various charging algorithms.

The problem I highlighted was keeping cells at high voltages for a very long time e.g several days.

A charger that gets to 14.6v for 4 LFP cells plans to take each cell to 3.65v - the cells need to be very closely capacity and IR matched or the BMS set very lax to allow this to happen in practice without one or more cells hitting HVD early and BMS cutting off charge.

You don't want your cells or a few of them hitting HVD on a regular basis so a charger like this should have adjustable voltage so that you can back off from the HVD point (set lower than 14.6v) for your regular charging.

viperVIP:
Please, has anyone used Felicity solar panels? Do they perform any good?

u get what you pay for, they may perform well for the first yr or 2...and then experience a shape decline in performance.
pony up the extra dough and get quality panels.

panels, battery are the 2 things a wise prudent renewable energy person shudnt scrimp on-----as you end up paying heavily for it.

yingli or original suntech should be the least panel, you should consider. if not save up and go for jinko/ja/era/canadian solar.....ensure you buy direct from known distributors

The attached pics are from several yrs old 250w panels in bright sunlight.47w and 72w respectively

odimbannamdi:
60A Powmr MPPT Solar Charge Controller. Comes with a free 1000V 63A double pole original Tomzn DC breaker worth at least 5,000

Price: 61,000 firm.
Resellers/Installers package: Buy at least 6 units on a monthly basis and get rebates of 2,000 on purchased quantity, payable by end of month. Terms and Conditions apply
* Repair service now available

Original 1000V 63A double pole original Tomzn DC breaker

Price: 5,000 firm

DC meter to provide 360-view of the vitals of your inverter system. It comes with 200A shunt.

Price: 10,000 firm

Your contact is needed sir.

NiyiOmoIyunade:
There are many types and designs of LFP charger with various charging algorithms.

The problem I highlighted was keeping cells at high voltages for a very long time e.g several days.

A charger that gets to 14.6v for 4 LFP cells plans to take each cell to 3.65v - the cells need to be very closely capacity and IR matched or the BMS set very lax to allow this to happen in practice without one or more cells hitting HVD early and BMS cutting off charge.

You don't want your cells or a few of them hitting HVD on a regular basis so a charger like this should have adjustable voltage so that you can back off from the HVD point (set lower than 14.6v) for your regular charging.

The charger doesn't have an adjustable voltage function, I have been using it like that for 4-5 years now though the lifepo4 are cylindrical in nature

isangjohnson:

Your contact is needed sir.

Check my signature, sir

Erm, curious about this. I believe it'll only work if you go manually to switch this off every time its about to rain?

So how's that going to work exactly?

Sunnystooth:
Hello,
Please what type and where in Lagos Island can I get a cheap electrical Isolator to help protect my solar installation from lightning now that the rains have started?

FEGEITOK:


My very last post on this thread above applies.

As requested ( this is my econo setup)

1. 1 No. 60A MPPT
2. 2 No. 1.5 KVA Inverter
3. 4 No. Quanta 12V 200AH batteries
4. 2 No. Jinko 470W panels (will be increased to 3a soon, then I will have to get another and hopefully more powerful MPPT)

Nice one

Do you have a BMS attached to your battery pack? What is the HVD on your BMS?

When the charger gets the battery pack to 14.6v what is the highest voltage on any 1 cell in the pack?

Are your cells 3.2v nominal?

The answers to these questions will help put your statements in proper perspective.

oloet:


The charger doesn't have an adjustable voltage function, I have been using it like that for 4-5 years now though the lifepo4 are cylindrical in nature

Lightning can strike in the absence of rain and even during the day too.

One would need a direct line to the gods to predict when lightning could strike and also be present to effect a safe system disconnect in advance.

A working solar system should have at least the minimum protection - at least 2pcs of 6 foot earth rods sunk in the ground 18 feet apart and bonded together and the solar panel frame/rack and charge controller earth point solidly connected to the rods.

At worst the panels/rack frame should connect straight to the rods while there is another cable service from the rods into the house terminated at a busbar or similar arrangement to earth the CCs to.

litaninja:
Erm, curious about this. I believe it'll only work if you go manually to switch this off every time its about to rain?

So how's that going to work exactly?

It would seem that lightening protection systems are differently engineered if the panels stay on the roof versus if the panels are on a stand directly connected to the ground.

Just wanted to highlight this point.

FEGEITOK:
It would seem that lightening protection systems are differently engineered if the panels stay on the roof versus if the panels are on a stand directly connected to the ground.

Just wanted to highlight this point.

spambot is already handling me

google furse lighting protection guide and dehn lightning protection guide

both have detailed lightning protection manuals with sections on PV installations

Good morning gurus,


Please which of this connection is better.

Connection 1
six solar panels connected in series/parallel to an MMPT charge controller in the manner as shown in the diagram

Connection 2
Six solar panels all connected in parallel to a PWM charge controller as shown in the second diagram

GloriousGbola:


spambot is already handling me

google furse lighting protection guide and dehn lightning protection guide

both have detailed lightning protection manuals with sections on PV installations

this is why I now post links in pictures.

sorry about that.

I know dehn, I actually posted their over 1 hour long YouTube video here, which I have watched.

I got that fact from there, I just wanted to make the point since not everyone might have made the time to watch the video. thanks for the reference to the furse lightening protection guide

15kwh 48v felicity lithium battery delivered successfully in Egbeda, Lagos state.. thanks Mr Seyi Akindele for the patronage.

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