duwdu:


Thanks for replying, and sorry I looked away too long.

My Ritar RA12-105F's allow for 14.4-15V Absorb/Equalization and 13.6-13.8V Float, respectively, at 25°C +-5°C. (Snapshot attached.)

About an hour ago, the ETEKCITY read 29.3°C on the body of the battery bank where it's usually most warm. (Snapshot attached.) The ambient (the floor around the area,) was at 27.5°C.

Although my system is indoor, it's positioned such that there's a stream of outside air/breeze in from one side of the house, over the installation, and out an [almost] opposite side. I think my batteries are hardly warm to the touch chiefly for that reason.

Eventually, I'll have to have a way of calibrating the ETEKCITY, or get a more high-end probe when the come comes to become. (Apologies K. O. Mbadiwe. )

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P34c3
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kiekie1:


We have various prices for different Korean , Chinese , German standard , American standard brands . Simply contact me via publicized online mobile number stating car spec or exact battery ahms(flat or long) needed ! Cheer's

DUNKA:
my problem with you is that Even if you want to settle with obasanjo and atiku your pricing na war I just need to know the Nigerian prices

Barezzi:
Guys,
Is there any danger connecting the AC output of an Inverter to its AC input?

NiyiOmoIyunade:
Perfecto!

It would seem you are in a good place then.

Be aware though that gassing voltage is about 14.4v at the 25°C reference - if you are not deep discharging your batteries then you may not need to go as high as 14.6v.

Charging a battery properly is a fine art akin to balancing on the point of a needle - some finnagling may be required before you hit the sweet spot.

You should troubleshoot why your voltage sense cables appear to be giving incorrect readings at the inverter/solar charger. Do you have temperature compensation as well? If not you may try for 29v actual measured voltage during absorb - unnecessary gassing when charging at high voltages may appear to give you higher battery capacity in the short run but in the long run will shorten your battery life as the battery dries out quickly especially when combined with high charge current.

You need to find that sweet spot that gives you the best bang for buck - not to say you are not already there but just laying out the guiding principles.

Barezzi:
Guys,
Is there any danger connecting the AC output of an Inverter to its AC input?

Saipro:

Usually, asides increased drain on the batteries (assuming not grid-tied), nothing should happen. Mid to premium builds would sense self-feed and either shutdown or display an error. Such has been my experience. Never seen an inverter damaged by such though.

chris81964:

The original Yiyen inverters used to go poof.

Barezzi:
Guys,
Is there any danger connecting the AC output of an Inverter to its AC input?

Barezzi:
Guys,
Is there any danger connecting the AC output of an Inverter to its AC input?

bigrovar:
Na wa for August o. Seems today is going to be yet another bad solar day across Nigeria. Generation has been up down up down.and I have a feeling it will get worse.

kiekie1:


Haha sure nt much a problem for hybrid designs ! Grid supplies compensates charging for most designs down here.. If you are totally off grid, few people are already considering wind turbine integration !! Oga Pranil , over to you as usual ... Happy Sunday to my beloved forumites !!!

bigrovar:
wind turbine is an an option in Nigeria we don't have enough wind. I am completely offgrid. This is the 3rd time the generator would be fired up this year the 2k fuel I got is yet to be exhausted so small price. Never had 2 consecutive bad day as my generation log for out going week will indicate, it usually alternate between a bad and very good day. and today might still turn out good.

nonoski:
Good day house
I'm trying to put up a borehole project in the village somewhere in Anambra State.
It's a village project that will be automated since nobody will be in the house most often time.
Which of these two options would u pick

Option 1: use Solar powered submersible (2HP) with automatic float switch.
The submersible is connected directly to the solar array without the use batteries nor inverter.
The solar array required is 1.8kw or more.

Option 2: use a regular 2hp submersible pump and get an inverter + Solar setup.
I am thinking of getting a 6.3kw solar array connected to a 600amps 48v battery bank using 2 Charge controller and 1no 5kva inverter.

My issue with option 1 apart from lower overral cost is that I have seen it installed in many places and the submersible pumps are usually prone to failure.
The solar array will only be used by the borehole.

While option 2 apart from powering the borehole between 11.30am - 2.30pm will also power the house.

nonoski:
Good day house
I'm trying to put up a borehole project in the village somewhere in Anambra State.
It's a village project that will be automated since nobody will be in the house most often time.
Which of these two options would u pick

Option 1: use Solar powered submersible (2HP) with automatic float switch.
The submersible is connected directly to the solar array without the use batteries nor inverter.
The solar array required is 1.8kw or more.

Option 2: use a regular 2hp submersible pump and get an inverter + Solar setup.
I am thinking of getting a 6.3kw solar array connected to a 600amps 48v battery bank using 2 Charge controller and 1no 5kva inverter.

My issue with option 1 apart from lower overral cost is that I have seen it installed in many places and the submersible pumps are usually prone to failure.
The solar array will only be used by the borehole.

While option 2 apart from powering the borehole between 11.30am - 2.30pm will also power the house.

kiekie1:


Yo yo yo that's quite cool as Oga Pranil has all that , yet creates room for Gen to kick in at certain periods . .. I havnt really had a reason to power my dusty gen set(as seen in snapshot below) for few years now as my battery bank is quite quantifiable and can outstay a week of dull/rainy weather even without grid supply, we simply do more strict daily load management as we have battery volt/% monitors all over(even in madams kitchen ) k...

NB: Mr Niyi has also joined us in large battery bank designs(38400wh) if I remembered correctly , am sure his can outlast 2 weeks of bad weather without AC , microwave, water heater usage to fiddle around 50-60% DOD .. Cheer's

bigrovar:


My problem is not large battery bank. But my strategy is to priotize a full battery over all else. Lead acid battery don't like being left in a state of discharge for a long time and one way to get best from them and prevent sulphation is to ensure they get full charge everyday. Hence my battery bank was 85% full when I turned on the gen because solar supply was not enough to charge battery and power the house at the same time.. So it is cheaper to charge battery from solar and power the house with gen..when weather changes for the better I can turn off the gen. If I spend 3k a year on fuel to ensure my battery never stays under charge for more than 18 hours in a cycle.. I think it is money well spent.

kiekie1:



Hello Nonoski, the both ideas are good but i will say 2hp is not really energy efficient especially when you ain't powering a large tank or community tank project ! My 1hp water pump fills up normal 2500L GP tank in less than 40min here in Lagos and in my Anambra villa home ... I will advice you cut down high wattage loads for more energy efficient items if you haven't even installed the 2hp water pump .. The 1st idea is independent of batteries but what will your people in the village use to see at night ? My Lagos set up is automated"float switch et al" and even after that , I still give serious orientation/lectures to avoid expensive mistakes . I will go with option 2 since its not a standalone community project exclusively for borehole but an in-house set up. Cheer's

zeestone99:


Option 2 is fine, u get power 4 d house too wch ll b very useful, that's if no1 scatters the whole thing.
Call/whatapp 08117398294 for quote


Gracias

Barezzi:
I'd go with option 2 Nonoski.
I use a 1hp sub pump, and my tank capacity is 4000 litres. It's level controlled between the hours of 11.30am and 1.30pm.

earthrealm:
anyone knows a budget 5kva/4kva inverter that has a charging current in excess of 40amps?.not usa or german
mustpower,highpower etc all clock in at 31amps max, so those running 8x200ah batts on these devices are you not bothered as the charging rate isnt upto c/10,

nonoski:









Thank you all for the response.

I'm yet to start the project, i'm still carrying out feasibility studies.
The tank capacity will 12,000 Liters.

In the part of Anambra I come from the depth of the borehole (450ft+) will over labour a 1HP pump if at all it will work.
So for now i'm stuck with the 2HP option.
The submersible will only run for 3hrs a day (11:30am - 2:30pm)

A 2HP submersible pump is about 1500W if i add 20% inefficiency that will be about 1800w.
So for the 3hr it will pump daily will be about 5,500-6,000w max from a battery bank of 28,800 ( 14,400w at 50% DOD) which i don't see as bad

nonoski:

Over size the PV and pump on sunny days. Or you can buy inverters for water pumps that come with built in MPPT controllers and no need for batteries.








Thank you all for the response.

I'm yet to start the project, i'm still carrying out feasibility studies.
The tank capacity will 12,000 Liters.

In the part of Anambra I come from the depth of the borehole (450ft+) will over labour a 1HP pump if at all it will work.
So for now i'm stuck with the 2HP option.
The submersible will only run for 3hrs a day (11:30am - 2:30pm)

A 2HP submersible pump is about 1500W if i add 20% inefficiency that will be about 1800w.
So for the 3hr it will pump daily will be about 5,500-6,000w max from a battery bank of 28,800 ( 14,400w at 50% DOD) which i don't see as bad

kiekie1:


Nice steps tho for your flooded battery bank and i never knew you wer entirely off the grid supply abinitio. The few examples I sighted all hovers around safe DOD's and sulphation won't occur to be factual... It was once argued few pages ago to intentionally allow your bank drain below 12v sometimes maybe for memory bla bla bla reasons ... Mind you>> here in Lagos , we can't stay over 1 or 2 weeks without sensing Sunlight OK ! It all depends on ones usage et battery bank etcetera.. Cheer's !

kiekie1:


Chief, I think we have hybrid 5kva specs that has upto 50-60a inbuilt cc designs.. If your budget is upto high end specs , simply opt in for Victron or Schneider brands .. Cheer's