olopan:
To Question
1. Yes, it does come with its own charge controller a PWM type.

2. This would have being advisable if you were not using a two battery system as ideally you should only be doing 40 - 50A max. Which is equivalent to around 1400W.

3. There is a way all your problems can go away, if you try the GROWATT 3KW 24V
It has a max. Capacity for 1500Wp and you can set your priority to Solar only battery then grid, and all these can be monitored remotely with ease.
And all the headache of over charging goes away as you can set the max. Current to be delivered to your battery to your desired current and still be served to be max of what the sun has to give.

If you need more info on the Growatt kindly respond.

I hope I have helped answer your question.
Cheers

wilmaria14:

Most of u don't get dis hybrid or not always get a CC for ur systems it helps it alot most of u buy hybrid and will not add a MPPT charger to it most all hybrid comes with PWM controller and for me anything more Dan 1kva need a MPPT charger control for it to work well dat is mistake most people do so
1 if u are going for hybrid or not buy a 60a MPPT
To cost it less buy ur normal 2kva inverter and den buy MPPT charger control for it
U can still buy 2kva diamond inverter one of d best with low cost but most people dont know
Tanks

kiekie1:
PRODUCT UPDATE! GET YOURS NOW!!

Axpert king off-grid 5kva 48v (80a mppt) pure sine wave inverter .... 345,000

Axpert 3kva 24v (40a mppt) pure sine wave inverter .... 137,000

Axpert 3kva 24v (50a pwm) pure sinewave inverter ... 115,000

Contact,
Smartcell global services
CALL:: 081-350-31951

earthrealm:


Yes they are,
8 x 250w near owerri.
12 x 250w in benin city.
Bulk purchase is encouraged with a slight discount, as seller would prefer dealing with 1 or 2 persons

Brando16:


I am interested. How do I get more info pls

Lahotade:


How do I contact you. I'm interested in getting up to 6 panels.

ojeysky:
I have got 2 brand new BMV 712 with temp sensor for grabs. 125k each

Q/A
Is this the victron BMV 712 with Bluetooth features?
Yes
Is the price negotiable?
No price is firm Sir/Ma
Does the price include shipping?
No it doesn't, but I can waybill to any part of the country at buyer's cost.

earthrealm:


Sent you a pm.
Whats your location

ceaser:


I guess you intend to type 480 watt-hour (12v 40 ah) battery and I'll wager it's those blue coloured lithium types. If I'm correct, you should get the functions of the four terminal wires correctly (2 input and 2 output) wires... .

contease:


Hi Ceaser and everyone.

I have an idea am trying to figure out it's possibility before embarking.

Please would appreciate a response accordingly. See questions below:

1. In a complete setting of inverter, mppt controller, batteries and solar. I want to replace the solar panel with an equivalent battery charger voltage. Example, on the mppt, the batter is connected to the battery slot, inverter is connected to the inverter slot then instead of the solar, I will connect an equivalent voltage capacity say 24v battery charger for a 24v inverter system. (normal ac battery charger) to the mppt. I already have my idea sketched waiting execution.

Guys, your thoughts please.

Whoever is available with an understanding of the solar system, please lets discuss this concept on whatsapp:

https:///qr/EIJPRNGHLYFCJ1

contease:

2. We all know on the mppt, the solar slot only allows for a one-way current flow, the battery side allows for a two-way current flow.

contease:
What is the nature of flow on the inverter/load side. This is just to enhance my knowledge to fine tune my concept/idea for my new concept.

contease:
...I already have my idea sketched waiting execution.

Barezzi:
I plan to do something similar on my genset starter battery (12Vdc 7Ah) to keep it healthy and charged as it runs once a quarter.
Options:
A. Get a Victron Orion 48v to 12v DC/DC converter and a timer to switch it on twice a month for 30 mins
B. Get an old laptop charger and connect it to the pv input of a charge controller. The same timer will switch on the laptop charger as above.
C. Replace the genset starter battery with Lithium equivalent and charge once a year.
D. Replace the timer switch above with a Victron BMV 712 from ojeysky and switch based on SOC or voltage.
E.

Any more suggestions will be appreciated.

ceaser:


Whatever you want to do, do not connect any form of charging source apart from solar panels to the solar panel input of a charge controller.

The charge controller is for panels, not for AC chargers. You can't even connect wind turbine generator to the terminal except manufacturer's specification says the charge controller also supports wind power input.


Contease to Ceaser,

Sorry I didn't clearly state my charger spec. For better understanding, I meant an equivalent AC-DC ordinary battery charger.. The reason is to have a semi self charging system... This is just a way to try deceiving the mppt but surely other variables like temp, etc will not display figures on this mppt (i sure don't care... Lol)

Its a bit complex to explain here.. Please can we have a brief whatsapp group to exchange ideas with the guy below whose idea differs from yours with the bus connection suggestion please.


The solar input terminal does not "allow two way flow" as you think. Rather the design is to prevent current flow in the reverse direction from the battery going back into the solar panel at night. This has two benefits: it prevents parasitic drain from the batteries into the panels at night and it also protects the solar panels from damage that may result from that.

Contease to Ceaser,
Am sorry, I had to rehighlight in caps... I never said the solar side allows 2ways..ofcos 2ways for a solar slot will be bad.



The load terminals of a charge controller also has reverse protection, especially the premium ones, and usually supports the max current of the CC itself, that is a 60A charge controller may support loads up to 60A on the loads terminals. That notwithstanding, it is not usually used for inverter loads. It's just for light loads like DC appliances like your DC bulbs, modems, chargers etc. So discard the idea of hooking your inverter onto the load terminal of your CC. Rather connect it directly to your battery terminals.
[b]
[b]Ceaser,
Thanks for this info. I was thinking to make the mppt be able to control the source of change of the battery since my type of inverter also has a charge system.

What I want to do is such that the charger is connected to the normal home sucket, so as the inverter/grid/Gen powers the house, the battery is charging but the mppt shld be able to stop current into the battery at full capacity while the inverter AC source is only from grid such that when grid is on, the inverter gets power which means it starts sending charge to the battery via the mppt but at such time too, the charging sends current too but it controls which current passes through to the battery just same way if the solar and grid were to be on.

But am glad u mentioned that the inverter shld be on the batteries direct. In this case, my worry will now be how to control which device charges the battery. But again, on a normal scenerio, with solar coming via mppt and inverter(with charging system) connected to the battery direct, then the mppt should know when the inverter is giving to the battery and when it's taking from the battery right?

Complex writing.. Can we continue this on whatapp or telegram please.. [/b][/b]

Barezzi:
@ contease
1. You can connect your proposed battery charger to the DC bus



The bus bar on the left carries the batteries, then all your dc loads (Inverter(s), CC, "your proposed dc charger" etc) are on the right bus bar.

2. Yes, you can connect a different DC source to the charge controller PV input to deceive it. As long as you don't exceed its maximum input current limit and voltage.

3. Post it here.

Brando16:


Does this come in 2kva?

ojeysky:


I am conflicted on this but option D seem to give you more flexibility

Barezzi:
I plan to do something similar on my genset starter battery (12Vdc 7Ah) to keep it healthy and charged as it runs once a quarter.
Options:
A. Get a Victron Orion 48v to 12v DC/DC converter and a timer to switch it on twice a month for 30 mins
B. Get an old laptop charger and connect it to the pv input of a charge controller. The same timer will switch on the laptop charger as above.
C. Replace the genset starter battery with Lithium equivalent and charge once a year.
D. Replace the timer switch above with a Victron BMV 712 from ojeysky and switch based on SOC or voltage.
E.

Any more suggestions will be appreciated.

NiyiOmoIyunade:
...el cheapo PWM CC sitting around unused and happy to be commissioned for this task.

Barezzi:
contease,
You will need to explain what you're really trying to achieve.
No need for whatsapp, as all ya issues can be resolved here.
We have over a thousand years of collective competence in renewable energy on this forum.

NiyiOmoIyunade:
You want Oga Barezzi to spend 100k plus on a BMV to keep a max 20k battery topped off?

Perhaps since Grid and PV are always available connecting a suitable AC/DC converter (laptop charger) to the PV input of a PWM CC to keep the battery always charged is the leanest option. You basically want to max out existing resources and the incremental energy needed to keep the starter battery topped off is negligible so it can be on 24/7.

Odds are good that everyone has a 19.xxvolt laptop charger + el cheapo PWM CC sitting around unused and happy to be commissioned for this task.

There are even purpose built small wattage panels + PWM CC to perform battery maintenance but a custom solution is more reliable and stable I believe.

Abdomox:


Many thanks for this information. Please help with name of Charge Controller that has equalization functionality. Also, will I be able to use the Charge Controller to increase the amps going into my batteries?

mcTrinity:


Hi BetaTech,

The first picture is what I'll call the Rail. Please note that there are two types (the Nigerian and the foreign)... The Nigerian version is harder and stronger compared to the foreign.



I hope this helps.... Cheers

earthrealm:


Epsolar 60amps mppt
Morningstar mppt.
Victron mppt.

Fangpusun wch is a chinese victron clone has that capability, but you need a special usb cable to unlock it.
Another option is buy an inverter with equalization option.
Mustpower,sorotec, phocos all have these.

Note these are just the models i can remember now
There are other models with similar capability out there