NiyiOmoIyunade:
Bentonite clay and marconite are good materials but you are better off with an industrial premixed GEM - see pic below

This will give a very low resistance (highly conductive) and non-corrosive earth with stable and permanent readings for 30 years or more.

Each GEM bag should cost under 25k at current prices.

If anyone will cheap out and use charcoal then they should get the powder form or grind/pound the lumps into as fine/powdery form as they can manage.

Salt leaches out of the install site as rainfall comes and goes every season and may also corrode the copper so I do not encourage the use - if you must use salt then test your soil resistivity and dose regularly.

NiyiOmoIyunade:
For items 2 and 3 it is best if you used a clamp meter to measure the startup surge and amps draw while the pump runs. This is safer for you as you won't break something by accident.

Just clamp the live wire (only) supplying power to the pump and read the amps - if you happen to have an AC watt meter with CT coil, that can do the job and give you a direct watts reading

NiyiOmoIyunade:
I am now officially shook at the variety of pumps in circulation and their penchant for eating up insane amounts of energy

But fortunately I have access to quite a few pumps at my own location and customers' too - below is a picture of my 2hp garden irrigation pump - it is 2hp / 7.1a / 1.6kW which is pretty within spec of what 2hp should draw in a normal duty cycle.

To your questions

1) I suppose the Stabilizer has been paired with the pump and working in that application for a bit? - the proof of the pudding is in the eating. I would not normally use a 5kva relay stabilizer with 3.45kw of inductive load as you say the pump consumes but the pump startup surge is just for a few seconds and a decent stabilizer should be indifferent to this surge since the load is just passing through the transformer windings directly.

Is low voltage a real problem in this pump application? Then I would have specced a servo stab with size suitably derated for the lowest operating voltage I expect on the input side of the stab.

2) I cannot say what your pump consumes and the nameplate is just a guide - you have to measure, measure, measure to know what the consumption is. I have encountered some ancient pumps being used out of tolerance but the biggest issue they present is the start up surge tripping up our protection devices - once running they run okay albeit inefficiently.

3) Measure your pump's actual power draw vs the inverter's surge rating to size properly. Already you said you think the pump eats 3.45kW so that would already exceed a 3kW inverter's rated capacity.

4) One of the sad parts of an engineer's training is the loss of certainty and constant calling out of caveats and qualified opinions - a 200a BMS in 24v nominal application SHOULD run ~5kW easy however not all BMS with 200a written on them can do that rating. without problems. Also how was your LFP pack built? How were the cell interconnects made and were they properly torqued tight? This will drive how well the LFP battery pack does with large loads. I belong to a backend forum of LFP battery pack builders and I can assure you failures due to improperly torqued connections are very common although some will refuse to acknowledge this fact. Getting quality cells that can withstand a proper torque and how to deliver that proper torque became the holy grail of our movement.

My own custom LFP builds use an industrial grade machine to deliver an accurate amount of torque to each cell connection. We have not had one single failure or need to go retorque anything in a pack.

If indeed your pump draws 3.45kW, you will be operating pretty close to your battery 1C rating - a well designed pack can carry this load but you may well run out of stored energy if the pump is running for a long time - it were probably best to have some PV assist or Grid or Genny or constrain the pump draw and run time to within the stored energy delivery ability of your battery pack. In other words despite using the much vaunted LFP you probably need a different larger battery or switch to a smaller and more efficient pump for long term stability.

Finally at the risk of serious vitriol and backlash from
a certain set of people, I reiterate that a 1.5hp pump drawing 1.8kw and above is either ancient or inefficient or falsely labelled. When I say inefficient I mean broadly that the pump is either working a harder duty cycle than designed (undersized) or the wrong pump is being used for the application (over powered) amongst several possibilities. In the best case the hp rating should be upgraded to match the actual electrical behaviour of the pump (address misleading labelling) - this is what an informed user or technical person should do vs. trying to reinvent the relationship between various standard measurements of energy and work done.

The fact that something can move/lift liquids does not mean it is the right pump for every application - just as people match inverter to loads, pumps need to be matched to the required duty cycle for an application. Again this is no wonder in a country where people routinely use a 5kVa inverter to run less than 1kW of loads with very brief surges into the 2-3kW range and applaud themselves on how 'robust' their design is or say the hugely oversized inverter is more 'rugged' which is why they chose it.

There! I said what I said ......

earthrealm:
Emyfine08

Submersible/sumo pump installed 700ft down is likely going to be a monster, above 10hp.

Lemme assume 10hp which is about 8kw, you would need minimum 250% of this in panels to ensure the sumo works decently during the day.
Ie 20kw panels, say 35 pieces of 600w panels.



also some brands/models of sumo dont have startup surge, . Such models would be best for you in this scenario. I have a 250watts sumo/submersible pump like that, zero start up surge, infact you can pump water with i pass my nebo gen or 500w inverter.but its limited to 120ft water head/depth.
Am unsure if such design is available for higher wattage sumo


Its best you get the exact consumption or rating of the pump to guide in the calculations.
If funds are a constraint, you can consider powering such a pump in battery less mode, with just panels and inverter.

Till you confirm the rating of the pump, all this would be in realm of conjecture

Juror:


If you substitute in another battery, it may just die under another year.
State your setup configuration and load profile, so you can get better suggestions.

TechGeek777:


Which of them does it better, is it the first picture or the second picture?

mank1234:
There is improvement in communication by Selina Li and Colin Deng of Sehnzhen Deriy. Their service is good and they handle shipping and clearing unlike others on Alibaba.

My cells were prepared even before I made payment. Hoping when it arrives it will be well balanced and the quality will be excellent as others have testified previously.

earthrealm:


Yeah, selina dey try
However @ bolded, its standard practice for cell buyer to properly top balance their cells to 3.6volts or 3.65 volts when they arrive.
Cells are only shipped half full @ 3.27volts as a safety measure for freight

emyfine08:
My big engineer's in the house as my first question was ignore please I want ask.is 24v system ok for 2500watts continuous load with Stan alone inverter? Or 48v system is ok? another one is
24v highbrid inverter vs 24v stand alone inverter which one is more efficient

vta2008:


Looks like they use the same manual for all models. Check the carton too.

Ask the seller what model he sold to you. Maybe it's on the receipt sef

mank1234:

OK.
Will connecting all cells in parallel balance the cells?

mank1234:

OK.
Will connecting all cells in parallel balance the cells?

Sheisenough01:


The installer bought all the items. I've concluded to maybe buy two more batteries to make 4.

My old setup did way better with two batteries.

Thank you vta2008 you've been most helpful.

samir101ng:


This !!! This power derating issue is also a point of concern apart from the intial cost of the inverter. With average temps over 30C even with the harmattan weather here in Abuja, your 5kva Victron inverter is essentially a glorified 3.7kva inverter. And at that price and performance, my wallet cannot justify such expenditure. I however tap into Bigbrovars grace to also buy Victron when the Lord blesseth my wallet. Egbon Niyi, please keep on preaching the blue gospel. Your ministry shall flourish together with Nigeria's GDP

NiyiOmoIyunade:
IVPM models are low frequency transformer based inverters with MPPT - the IVPM5048 should have a 120a MPPT bundled in

IVPS models are low frequency transformer based inverters - NO MPPT

IVEM models are high frequency hybrid inverters. The current iterations can do PV voltage up to 450v DC.

People colloquially call the high frequency inverters 'transformerless' but technically that is not the case.

Forrkke:
The two 150w panels ( foreign used) an installer used for my 100a battery are not charging it.

What could be the problem?

emyfine08:
My big engineer's in the house as my first question was ignore please I want ask.is 24v system ok for 2500watts continuous load with Stan alone inverter? Or 48v system is ok? another one is
24v highbrid inverter vs 24v stand alone inverter which one is more efficient

mank1234:
There is improvement in communication by Selina Li and Colin Deng of Sehnzhen Deriy. Their service is good and they handle shipping and clearing unlike others on Alibaba.

My cells were prepared even before I made payment. Hoping when it arrives it will be well balanced and the quality will be excellent as others have testified previously.

Obnoxious2001:


For the shipment, do you have idea what is the range of cost and what method of shipping/logistics Comp. Is used

mank1234:
There is improvement in communication by Selina Li and Colin Deng of Sehnzhen Deriy. Their service is good and they handle shipping and clearing unlike others on Alibaba.

My cells were prepared even before I made payment. Hoping when it arrives it will be well balanced and the quality will be excellent as others have testified previously.

isangjohnson:
Any seller here that has Class T Fuse 225A?

Jefferyzz:
E dey AliExpress

nnadychuks:
sorry I’m just getting back, I was trying to study the configuration.
It’s an AC connection, 2.4kw inverter with 2 220ah batteries and 8 big panels.
Heavy appliances like pumping machine and water heater have been disconnected from the inverter. The highest load is ps4 slim and tv rounding up at 200W…
There are 4 ceiling fans which are simultaneously running and we never power fridge with the inverter.

isangjohnson:

I checked and I didn't see it