lovely installation and true acknowledgement to the forum, many of us give thanks to this forum.

BIG THANKS to all that have contributed to the development of this forum and those who still find time to helping others particularly oga Niyi and many others. millions of readers enjoy your contributions.

for our marketers on the forum

i remembered I was practically requesting you guys in January to post ur price lists, I say well done to you guys, you have guided many even though your prices were way too scarey sometimes up to 25% top up. I am of the view that you also have a stake on this God sent, remarkable, laudable and nigeria's most dependable solar forum. I will not advise but say Marketers have a duty to submit persional review of their products possibly with their redemable warranties any time they dump their price list here.

finally, I wish the forum contributors and silent the readers the best of the season.

am futher tempted to say up up RE - power to the people !!! (not campaigning for PDP ooo) but you know better.

nonoski:
My solar journey so far.

Observations coming in the next post…

Pix 1: Solar Panel array
Pix 2 battery connection with equalizer and indicator
Pix 3: mounting if the CCs
Pix 4: Final installation

Malevonent:


you bought direct from the distributors, or from a seller here?
if dealer pls gimme their contact or link

distributor has several branches across the country tell me your state or region so dat I can request their number and send to you. send or paste ur contact if interested.

mcTrinity:
Also, most times, the suppliers doesn't help matter. If a client demands I supply him 12 batteries. if 12 batteries of same brand are not available at that moment, I'll simply tell him to either go for 8 or just wait.

But then, I've discovered that even most of them don't know any single nothing. They just know "pay and I'll supply". whether you're buying 5 different brands to use on one bank, they don't know the consequences

yet, even those that are fully aware of the consequences will still go ahead with the transaction... after all, what's their business. tomorrow when you start complaining, they'll put all blame on you. that's when you'll know that asking for warranty from our dealers is like asking PMB to resign...

It is well o

My brother, this country na so so gain gain, even if it's going to destroy my neighbors, I don't care! Just for me and my family to be okay, another's can die. All we care about is money, which ever way u make it, not our business(sadly our religions support that now). I discovered recently that the common 2.5mm2 single core wire they sell now is not upto 1.35mm2. How? I want to get a 6mm2 wire, my customer told me to go for 4mm2 one particular product; he says it's better than that 6mm2 I asked for. I was confused and I bought the 4mm2. His reason was that, in meters, the one he recommended is better, but I don't believe that. I bought a little piece of the other one. Got home, brought out my micro meter screw gauge and measured the wire diameter to be sure. I discovered that the 4mm2 diameter correspond to the actual 4mm2, while the 6mm2 diameter correspond to around 3.5mm2.
So, must of this guys selling this stuff know nothing about what they re selling. And the people that do know are in one stupid office chasing after papers(I am not excluded from this). Mixing of batteries of different maker: No No No No.... That little internal resistance difference will sink a whole ship! It's just physics my brother.

nonoski:


If only u knew the nr of days I soaked Garri to be able to afford 12 batteries (N1.3m) within 6 weeks.

nonoski:
Observation Nr 1:
Avoid the temptation of mixing old and new batteries u will eventually regret it.

Observation Nr 2:
Try as much as possible to have a battery voltage indicator connected to all the batteries so u can always see the voltage of each battery and know when one is under performing so as not to drag the entire bank along with it.

Observation Nr 3:
I am still wondering if one can truly sustain on solar. (My saving grace is that when PHED lite is on it can stay as much as 2 weeks without blinking but when it goes off it takes another 1 week for it to be restored.)

In Port Harcourt during the raining season harvest was very very low. My 4.5kw solar array usually puts out about 5kwh – 8kwh on good days and as low as 3kwh on bad days.

Initially I tot there was something wrong with my connections but on some VERY rare occasions when the sun shines all day it puts out about 14.5-15kwh with instantaneous power at average 3.4KWp - 4.1KWp.

Since the coming of dry season here in PH, my KWp has reduced to Max 2.6KWp for a 4.5kw solar array but the daily harvest moved up to about 14.5+kwh.

I am a little confused coz I was hoping that my KWp will remain high now that the sun is here

Pic 1 & 2: are from today and yesterday

While

Pix 3 & 4: are from early November during tbe raining season.

Is it safe to assume that Kwp is better during the racing season than during the dry season?

What a beautiful setup and a wonderful journey so far, it is not easy o.
From the 4pix u uploaded, I could only see that ur batteries enter absorption stage 1 out of 4 times, no float at all. is this a regular thing?
If yes, then u do not need any more panels, the ones u ve is okay. What you need now is ENERGY CONSERVATION not generation. Bigrov, where are you?

mcTrinity:
Also, most times, the suppliers doesn't help matter. If a client demands I supply him 12 batteries. if 12 batteries of same brand are not available at that moment, I'll simply tell him to either go for 8 or just wait.

But then, I've discovered that even most of them don't know any single nothing. They just know "pay and I'll supply". whether you're buying 5 different brands to use on one bank, they don't know the consequences

yet, even those that are fully aware of the consequences will still go ahead with the transaction... after all, what's their business. tomorrow when you start complaining, they'll put all blame on you. that's when you'll know that asking for warranty from our dealers is like asking PMB to resign...

It is well o

lolz, true talk, like the installation i saw, 4 smf + 4 fla batts, ojigbijigbi , am suprised it has lasted upto 1yr

DMerciful:
Watchout for the impact of those equalizers or balancers...I have a strong conviction that they cause more harm than good.

this is why i love diy, it will be interesting to know why you hold this view. i use to have similar vewpoint too. but at this point am in 200% agreement with oga Niyi with regards to equalizers /balancers do work alot.

i know a thoroughtly bred diy will learn from past mistakes just as nonoski has mentioned.

sometimes I feel like creating a YouTube channels with a title "how not to do solar" because I have broken almost all standard procedures or advices. I have mix panels, lead acid Battery type and age, improvised or not, used lihium batteries without bms, trying 300dcv arrestor on 150dcv limits etc. etc

but today I will not misled you.

battery balancers works when you used HAO 2( and not victron/fangpusun methods of replication of cables, believe me even though they works, but at a slower speed.).

I will love to compare details when ready.

Oshomo12:


My brother, this country na so so gain gain, even if it's going to destroy my neighbors, I don't care! Just for me and my family to be okay, another's can die. All we care about is money, which ever way u make it, not our business(sadly our religions support that now). I discovered recently that the common 2.5mm2 single core wire they sell now is not upto 1.35mm2. How? I want to get a 6mm2 wire, my customer told me to go for 4mm2 one particular product; he says it's better than that 6mm2 I asked for. I was confused and I bought the 4mm2. His reason was that, in meters, the one he recommended is better, but I don't believe that. I bought a little piece of the other one. Got home, brought out my micro meter screw gauge and measured the wire diameter to be sure. I discovered that the 4mm2 diameter correspond to the actual 4mm2, while the 6mm2 diameter correspond to around 3.5mm2.
So, must of this guys selling this stuff know nothing about what they re selling. And the people that do know are in one stupid office chasing after papers(I am not excluded from this). Mixing of batteries of different maker: No No No No.... That little internal resistance difference will sink a whole ship! It's just physics my brother.

Good observation! Quality cables are readily available if budget isn't a constraint ! See attached snapshot of complete guage heat/sun resistant copper cables with earthing strands i often use for PV installations and supplies on regular basis ....

How long have you used it on you batteries?

efuro:


this is why i love diy, it will be interesting to know why you hold this view. i use to have similar vewpoint too. but at this point am in 200% agreement with oga Niyi with regards to equalizers /balancers do work alot.

i know a thoroughtly bred diy will learn from past mistakes just as nonoski has mentioned.

sometimes I feel like creating a YouTube channels with a title "how not to do solar" because I have broken almost all standard procedures or advices. I have mix panels, lead acid Battery type and age, improvised or not, used lihium batteries without bms, trying 300dcv arrestor on 150dcv limits etc. etc

but today I will not misled you.

battery balancers works when you used HAO 2( and not victron/fangpusun methods of replication of cables, believe me even though they works, but at a slower speed.).

I will love to compare details when ready.

nonoski:
My solar journey so far.
( All connections were done by my humble self with good amount of knowledge gotten from this forum. )

Earlier this year I decided to add solar component to my inverter of 4 x 200A battery (48v 200A – 9600W).
So I connected 12 units of 250w solar panel (3kw) with 80a Flex Max Outback CC.
I later increased my battery Bank from 4 x 200A
To 8 x 200A bank (48v 400A) in April this year.

Mistake Nr 1:
When I was still using 4 batteries I noticed 1 of the batteries reading below 11v, so I changed that single battery and added the new battery into the bank. (March this year)

Mistake Nr 2:
I bought 4 extra batteries in April to increase the capacity, thereby mixing 4 + 1 = 5 new batteries with 3 old batteries Totaling 8 batteries.

I later increased the Solar component to 18 units of 250w panels (4.5kw) thereby maxing out the CC capacity of 4kw for 48v setup.

In November this year I noticed that the batteries drained to quickly, although the inverter had neva beeped, I decided to check the batteries in the morning and noticed the older batteries were around 10.8v – 11.2v.

Having learnt my lesson I quietly bought 12 new SMF batteries (6 Genus 6 Bluegate batteries) this December (48 x 600A), I also decided to buy battery indicators to know the voltages of the batteries at all times.

I have also increased my solar component to 24nr 250w solar (6kw)
18nr 250w panels (4.5kw) are connected to one Flexmax 80A Outback CC, the other 6nr 250w connected to the second Flexmax 80A Outback CC.

So basically I have a 6kw Solar panel array with 48v 600A battery bank; 2nr Flexmax 80A CC; 3nr 48v battery equalizer; 12nr battery indicators; 5kva Must Power Inverter.

Observations coming in the next post…

Pix 1: Solar Panel array
Pix 2 battery connection with equalizer and indicator
Pix 3: mounting if the CCs
Pix 4: Final installation

impressive congrats. you no wan carry last for solar panel academy. see panels. my question you upgraded batteries from 48v 200 ah to 48v 600ah and added more panels and charge controller.
what about your inverter is it the same charging your new battery bank or you upgraded or added external charging.

DMerciful:
How long have you used it on you batteries?

victron clone /fangpusun 11 months
HAO 2 - about 4 months

battery type 4 gel (1 year ) + 4 smf/last (6 months old)

with stead night loads of about 320w ( 24hrs of two 32 inch LG lcd , two decoders, two regular 70w ceiling fans).

one of my gel batteries was drifting by 1v (probably due extra cooling fans attached ) but since I added HAO 2 corrected this problem and my least wake up voltages these days is around 48v
my battery banks get charged around 9am-10am daily and floats all day even with a max loads of 2400w from my 4.2kw array.

see
picture 2- cc on gel battery
picture 1- cc on smf/la

on over night today.

Nice one my Oga.

Oshomo12:


Note: I just noticed that, this is the way I wired most of my batteries bank. For the 24V setup, I use just one balancer and 2 volts reading indicators instead of 4.

I can confirm that the HA02 battery balancer works very well. Battery balancing has become a key part of using a large battery bank sustainably and even most Lithium BMS have some sort of battery balancing mechanism in their core design.

The common issue I see with all the people I have heard complain about the HA02 seeming to unbalance their bank is that they bought off AliExpress and/or from an unproven source . I have only ever used the HA02s from an Amazon seller called ZHC Solar - after many transactions, we took our business offline and so far so good he has never dissappointed. He was even able to point me back to TaicoPower his actual source - when I showed him AliExpress prices to beat down his quote he would shake his head and insist that it was impossible to sell the product at that price and make a profit if sourced from the original manufacturer.

I don't like the HA01 but the HA02 is designed very differently and it works well to maintain balance if used on a set of good batteries from the beginning.

I have had some units in use nearly two years now and all the banks are nearly in perfect sync. 0.1v difference between batteries like an installer here once visited me and showcased my setup.

DMerciful:
How long have you used it on you batteries?

efuro:


this is why i love diy, it will be interesting to know why you hold this view. i use to have similar vewpoint too. but at this point am in 200% agreement with oga Niyi with regards to equalizers /balancers do work alot.

sometimes I feel like creating a YouTube channels with a title "how not to do solar" because I have broken almost all standard procedures or advices ....

but today I will not misled you.

battery balancers works when you used HAO 2( and not victron/fangpusun methods of replication of cables, believe me even though they works, but at a slower speed.).

I will love to compare details when ready.

mcTrinity:


congratulations on the bold step bro. however, after soaking the garri, you still made a mistake. Dmerciful just pointed it out

NEVER mix batteries of different brands; even if they are same capacity and technology. even if they were manufactured the same day and time. They can never ever have exact same characteristics.

few manufacturers do state it in the leaflet that comes with their batteries. Mpower just re-branded their battery. The new ones now comes with a leaflet with battery do's and don'ts. one of the do's is "always use batteries from same manufacturer within a bank of multiple batteries"

it would've even been a little bit manageable if it were maybe, 8 from one brand and 4 from another brand.
nevertheless, mixing batteries from different manufacturers, is just a NO NO

It wasn't originally my intention to mix the batteries but i changed my my mind on the Nexus batteries after buying 6. A friend told me of the nasty experience he had with them.

The Bluegate batteries are sold with Warranty and i have used that brand for close to 10 years.

My worries are coming to pass as i have noticed 1 of the Nexus batteries is behaving funny

Yesterday morning and this morning it was reading 12.4v while the rest are 12.6v.

When it starts charging it will be reading 14.8v while the remaining 11 batteries are reading 14.3 - 14.4v.

Basically that particular battery charges faster and discharges faster.

I don't know if its the HA02 equalizer as someone suggested cos these batteries are just 2 weeks old.

Oshomo12:


What a beautiful setup and a wonderful journey so far, it is not easy o.
From the 4pix u uploaded, I could only see that ur batteries enter absorption stage 1 out of 4 times, no float at all. is this a regular thing?
If yes, then u do not need any more panels, the ones u ve is okay. What you need now is ENERGY CONSERVATION not generation. Bigrov, where are you?

Yes i have increased capacity from 4.5kw to 6kw by next week i will add the final panels which will bring it to 6.75kw.

But i'm not bothered about the absorption stage coz from Monday morning to Friday evening we usually have 100% lite from PHED so the batteries remain in float mode.
Basically the solar system works starts working from Friday evenings.

samnaija:

impressive congrats. you no wan carry last for solar panel academy. see panels. my question you upgraded batteries from 48v 200 ah to 48v 600ah and added more panels and charge controller.
what about your inverter is it the same charging your new battery bank or you upgraded or added external charging.

Yes same Must Power 5kva.
Rugged piece of equipment, neva found wanting for any reason.

My load has remained constant coz my house is wired with 2 separate Distribution Boards: TP&N for heavy loads; SPN for lights, Tv and specific sockets.
So my load has been constant.

nonoski:

Yes i have increased capacity from 4.5kw to 6kw by next week i will add the final panels which will bring it to 6.75kw.

But i'm not bothered about the absorption stage coz from Monday morning to Friday evening we usually have 100% lite from PHED so the batteries remain in float mode.
Basically the solar system works starts working from Friday evenings.

Better then, all correct!

nonoski:

Yes same Must Power 5kva.
Rugged piece of equipment, neva found wanting for any reason.

My load has remained constant coz my house is wired with 2 separate Distribution Boards: TP&N for heavy loads; SPN for lights, Tv and specific sockets.
So my load has been constant.

The reason i am asking the must inverter what's the max charging current.is it adequate for such a large bank. Because u have hinted about the bad weather in ph to solar.

Morning guys,
I just took delivery of the Fangpusun replacement CC from DHL today. No charges or what so ever. Maybe because it was tagg a girt. I will update the house to what led to this. So @ oga Niyi, no be only you dey enjoy super customer service o, we Fangpusun team too dey represent. Wonderful customer service and they keep to their warranty!

Enjoy the replacement.
They replaced mine too without much ado and totally free of any charge.

Oshomo12:
Morning guys,
I just took delivery of the Fangpusun replacement CC from DHL today. No charges or what so ever. Maybe because it was tagg a girt. I will update the house to what led to this. So @ oga Niyi, no be only you dey enjoy super customer service o, we Fangpusun team too dey represent. Wonderful customer service and they keep to their warranty!

DMerciful:
Watchout for the impact of those equalizers or balancers...I have a strong conviction that they cause more harm than good.

I have my suspicions too. Seems they're great while charging but not the best while discharging i.e. they keep some batteries from overcharging at the expense of others.

Oshomo12:


My brother, this country na so so gain gain, even if it's going to destroy my neighbors, I don't care! Just for me and my family to be okay, another's can die. All we care about is money, which ever way u make it, not our business(sadly our religions support that now). I discovered recently that the common 2.5mm2 single core wire they sell now is not upto 1.35mm2. How? I want to get a 6mm2 wire, my customer told me to go for 4mm2 one particular product; he says it's better than that 6mm2 I asked for. I was confused and I bought the 4mm2. His reason was that, in meters, the one he recommended is better, but I don't believe that. I bought a little piece of the other one. Got home, brought out my micro meter screw gauge and measured the wire diameter to be sure. I discovered that the 4mm2 diameter correspond to the actual 4mm2, while the 6mm2 diameter correspond to around 3.5mm2.
So, must of this guys selling this stuff know nothing about what they re selling. And the people that do know are in one stupid office chasing after papers(I am not excluded from this). Mixing of batteries of different maker: No No No No.... That little internal resistance difference will sink a whole ship! It's just physics my brother.

Yup, I had a sample of some 4mm² I bought some 10 or so years back which is about the same diameter as the currently sold 10mm² copper cable. Very saddening.

NiyiOmoIyunade:
I can confirm that the HA02 battery balancer works very well. Battery balancing has become a key part of using a large battery bank sustainably and even most Lithium BMS have some sort of battery balancing mechanism in their core design.

The common issue I see with all the people I have heard complain about the HA02 seeming to unbalance their bank is that they bought off AliExpress and/or from an unproven source . I have only ever used the HA02s from an Amazon seller called ZHC Solar - after many transactions, we took our business offline and so far so good he has never dissappointed. He was even able to point me back to TaicoPower his actual source - when I showed him AliExpress prices to beat down his quote he would shake his head and insist that it was impossible to sell the product at that price and make a profit if sourced from the original manufacturer.

I don't like the HA01 but the HA02 is designed very differently and it works well to maintain balance if used on a set of good batteries from the beginning.

I have had some units in use nearly two years now and all the banks are nearly in perfect sync. 0.1v difference between batteries like an installer here once visited me and showcased my setup

Right, on the money. The HA02 is a different equipment not only in design buy in function. Annoying hum though (I wonder why I can hear it at my age). While at the risk of seeming to speak from both sides of my mouth, let me clarify.

Like most other good BMS, the HA02 does well for the charging phase. Not sure how beneficial robbing Peter to pay Paul might be (the discharging phase) but lithium BMS work differently.

It's that discharge part that's got me being wary.

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My Oga. I both understand and agree with you how it seems one is arguing for both sides. The issue of battery bank balancing is rather complicated and controversial and even if one got all of the elements of the battery maintenance equation right, a lead acid battery is designed to ultimately fail anyways [chemically induced decay].

Most battery balancers operate by bypassing the 'high' battery during charging and some others bleed power away from the 'high' battery. The HA02 is unique in that it has four isolated power units inside allowing you to actually move current from high battery to low battery without shorting out the series connections.

Anecdotally, I find the HA02 more effective at keeping the batteries within 0.1v of each other during the discharge phase, while charging, the voltage difference could rise as much as 0.3v especially during absorb. Sadly I only have regular access to a few battery banks other than my own to monitor long term behaviour so I have not yet developed my hunch into a proper scientific theory.

The HA02 will work best if attached to new batteries in good condition, where one or more batteries are already failing, the HA02 will improve the situation somewhat and give perhaps one or more hours of runtime but most likely not save the ailing battery.

One flaw I am certain the HA02 could improve on is the 'charge algorithm' - in as much as it can move power from stronger to weaker battery, it stops the process too early once the battery voltage begins to converge - the weaker battery never actually gets into the same state of charge as the stronger battery - they just come closer to each other in state of charge perhaps within 90% of each other - so close yet so far as Victron's research tells us a 2% variation in battery capacity is sufficient to bring down the entire bank over time.

If the HA02 could perform bulk > absorb > float for each battery, then that would be a lovely thing indeed.

Saipro:

Right, on the money. The HA02 is a different equipment not only in design buy in function. Annoying hum though (I wonder why I can hear it at my age). While at the risk of seeming to speak from both sides of my mouth, let me clarify.

Like most other good BMS, the HA02 does well for the charging phase. Not sure how beneficial robbing Peter to pay Paul might be (the discharging phase) but lithium BMS work differently.

It's that discharge part that's got me being wary.

Please I am looking for a manual battery disconnect switch (not DC breaker) similar to the popular Blue Sea Systems but perhaps more robust.

The idea is to be able to flip/turn a lever and isolate an inverter or CC from the battery bank for maintenance without having to unscrew any cable from battery post or busbar

Someone is advicing me to use a large AC changeover (plenty copper) but I believe there has to be a more elegant way.

I don't want to use those red Blue Sea Systems disconnect switches because I have found them prone to failure

Does anyone has an experience on "Voltron 12/24/48V LCD 60A MPPT Solar Charge Controller VT16-6015F"

I found it at Datacom and it's dataset seem interesting

NiyiOmoIyunade:
Please I am looking for a manual battery disconnect switch (not DC breaker) similar to the popular Blue Sea Systems but perhaps more robust.

The idea is to be able to flip/turn a lever and isolate an inverter or CC from the battery bank for maintenance without having to unscrew any cable from battery post or busbar

Someone is advicing me to use a large AC changeover (plenty copper) but I believe there has to be a more elegant way.

I don't want to use those red Blue Sea Systems disconnect switches because I have found them prone to failure

How about this one? In use for over 2 years and no issues

NiyiOmoIyunade:
Please I am looking for a manual battery disconnect switch (not DC breaker) similar to the popular Blue Sea Systems but perhaps more robust.

The idea is to be able to flip/turn a lever and isolate an inverter or CC from the battery bank for maintenance without having to unscrew any cable from battery post or busbar

Someone is advicing me to use a large AC changeover (plenty copper) but I believe there has to be a more elegant way.

I don't want to use those red Blue Sea Systems disconnect switches because I have found them prone to failure

Niyi, I have been using this one for over two year in my 48v setup:

[url]https://www.ebay.com/itm/12V-ON-OFF-BATTERY-ISOLATOR-KILL-SWITCH-BOAT-CARAVAN-RV-1250-275-AMP/152639983051?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D20131003132420%26meid%3D63b55e44ced14e53802aba8b83892ec9%26pid%3D100005%26rk%3D4%26rkt%3D12%26sd%3D371814840524%26itm%3D152639983051&_trksid=p2047675.c100005.m1851[/url]

Thanks everyone that contributed
PV max current is 60A and my configuration is 40.5A max
So on Sunday I went back as early as 8am to observe I also contacted Mustpower company about the issue which they told me that it never happened before but as well render some assistance so I was able to resolve it after running a factory reset and setting battery full charge to 58v which match the AGM in the manufacturer manual
There was no cut in charge again so I decided to monitor the process all Sunday
As am speaking the client told me he run on AC all night

Oshomo12:


Hello, what is the maximum input current for the inverter(pv section, we know d max pv voltage is 145v, u need to know d max input current too)?
Go back there and start with 3*2 config and see what happens. If it works fine, go to 3*3. My guess is, maybe 3*4 config current is high for the pv input of d inverter. Good luck.

NiyiOmoIyunade:
My Oga. I both understand and agree with you how it seems one is arguing for both sides. The issue of battery bank balancing is rather complicated and controversial and even if one got all of the elements of the battery maintenance equation right, a lead acid battery is designed to ultimately fail anyways [chemically induced decay].

Most battery balancers operate by bypassing the 'high' battery during charging and some others bleed power away from the 'high' battery. The HA02 is unique in that it has four isolated power units inside allowing you to actually move current from high battery to low battery without shorting out the series connections.

Anecdotally, I find the HA02 more effective at keeping the batteries within 0.1v of each other during the discharge phase, while charging, the voltage difference could rise as much as 0.3v especially during absorb. Sadly I only have regular access to a few battery banks other than my own to monitor long term behaviour so I have not yet developed my hunch into a proper scientific theory.

The HA02 will work best if attached to new batteries in good condition, where one or more batteries are already failing, the HA02 will improve the situation somewhat and give perhaps one or more hours of runtime but most likely not save the ailing battery.

One flaw I am certain the HA02 could improve on is the 'charge algorithm' - in as much as it can move power from stronger to weaker battery, it stops the process too early once the battery voltage begins to converge - the weaker battery never actually gets into the same state of charge as the stronger battery - they just come closer to each other in state of charge perhaps within 90% of each other - so close yet so far as Victron's research tells us a 2% variation in battery capacity is sufficient to bring down the entire bank over time.

If the HA02 could perform bulk > absorb > float for each battery, then that would be a lovely thing indeed.

Very well said. If it could charge to satisfaction, I believe discharge really wouldn't be an issue (the batteries would even out over time). The search for a better mousetrap continues!

NiyiOmoIyunade:
Please I am looking for a manual battery disconnect switch (not DC breaker) similar to the popular Blue Sea Systems but perhaps more robust.

The idea is to be able to flip/turn a lever and isolate an inverter or CC from the battery bank for maintenance without having to unscrew any cable from battery post or busbar

Someone is advicing me to use a large AC changeover (plenty copper) but I believe there has to be a more elegant way.

I don't want to use those red Blue Sea Systems disconnect switches because I have found them prone to failure

Large AC switches indeed work - up until the arcing eats away the plates and makes it increasingly difficult to get the contacts in position. all of them fail eventually (poor plastic longevity for Blue Sea and similar types; corrosion for the AC changeover switches). If used daily (or a few times a day), the AC ones might last you up to 2 years before giving out. Your fuse might be better placed after the changeover if each bank isn't separately fused.

pitodenz:
Thanks everyone that contributed
PV max current is 60A and my configuration is 40.5A max
So on Sunday I went back as early as 8am to observe I also contacted Mustpower company about the issue which they told me that it never happened before but as well render some assistance so I was able to resolve it after running a factory reset and setting battery full charge to 58v which match the AGM in the manufacturer manual
There was no cut in charge again so I decided to monitor the process all Sunday
As am speaking the client told me he run on AC all night

Good to know that its resolved.