₦airaland Forum

bassdow:
that's one of the low points of (cheap) transformerLess inverters. dem no dey get strength and if you force dem, dem go pop. Even if e manage power am, e life no go long because it's outside it's capacity. You need like 6kva.

Alternatively, you could try increasing capacity of the capacitor in the control box of the submersible pump BUT can't tell how far that can help or if it would help at all. Truth is, that inverter small.

Don't know who told you 1.5HP is 1,500watts. You probably don't know about surge.

But wait Ooo. so you wan use transformerLess inverter of 24v to take power 1.5HP submersible pump.

meanWhile, shey na Hair abi Air you dey FRY

osayuwamwen:
Pls my 4200watt luxsun inverter 24v could not power my 1.5hpower submersible pump, but it power my electric cooker and hair fryer, when I on my pump the inverter shows the submersible pump is pulling 4kw and shows 100% load. 1.5hpower submersible pump is less than 1500watt I think

justasitis:
The 4.2KVA Luxsun inverter not being able to power your borehole 1.5hp submersible pump could be as a result of the following:
1. Does your Lithium Battery BMS support high current discharge because the 1.5hp pump will definitely draw high current at startup. As such a 200A BMS is recommended for a 24V Battery that is paired with a 4.2KVA Inverter.

2. Are you powering other electronics/ gadgets while attempting to power the 1.5hp pump because those other gadgets might overload the inverter.

3. What brand is your 1.5hp Submersible Pump because some brands are designed to pull excessive high currents during startup than others. You can check the power rating on the different brands available to confirm this.

Besides, I normally use the same 4.2KVa Luxsun Hybrid Inverter to power my 1hp Interdab submersible pump. It normally consumes 1.4kw but draws 2.2kw at startup. I even use the inverter to power my 1hp surface pump and cooker at the same time.

Tdoctor:
I'm happy you spoke about start up current. 1.5hp takes about 1700/1800w. But the problem is the start up current, which can be up to 4 times the running watts. So the 1.8 x 4 = 6kw-8kw for startup which may be too much for the inverter if it does not have a high peak power.

bassdow:
I don already tell am to increase spec of the capacitor though not sure how helpful that could be. I don use 4KVA Haisic for client run 1HP surface pumping machine and na same 24v but then again, different pumping machines and inverters have varying capacity

Unfaized:
@ codemaster2much see sweet deal for you.

osayuwamwen:
You mean I should get like a 2hp controll box?

hoover420:
Boss, how good is this deal and is it better compared to the likes of haisic batteries?

bassdow:
discuss with someone that works on pumping machine. Alternatively, rather than getter another control box which would be costly, its much CHEAPer changing just thhe capacitor. That way if e no perform magic, you could either leave it or return it.

Thing is, we don't know the gap between what your inverter can carry and your pumping machine. Also like someone asked/suggested earlier, ensure when powering pumping machine, it's the only load on . I often tell people to only switch other loads on after the pumping machine has started.

Another is, a 24v inverter running 1.5HP submersible isn't that small especially if the dept is very high + na transformerless inverter; dem no dey get strength like that.

ANother thing is, you didn't tell us how many Solar panels installed and config, also thickness of the battery and PV cables, and probably distance from Solar panels to Inverter.

Either way, a 4kva inverter is small for a 1.5HP submersible, especially when it's 24v system and transformerless. Even if it works, you just would be shortening the operatable life of the inverter + batteries.

Ensure you only pump water when the sun is really Up and shinny.

omonla5:
The first thing you should do is contact the person who did the borehole for you. Confirm the length or number of pipes he used. That will let you know if the 1.5hp pump is justified or overkill. Some of our technicians quote what they can get higher "kickbacks" from.

Today marks 6 years since I moved into my house. I've been using my 0.5hp submersible pump since then without issues.

When I started my solar journey a month or so after I moved in, I started with a 2000W souer sachet nverter, 4 pcs 150W solar panels, a cheap 40ah PMW charge controller, and a 100ah Zedix LA battery.

As small as this setup was, I used it to power my submersible pump without difficulty and run my deep freezer for two to 3 hours daily.

What I'm saying in essence is that, he should first verify the depth of his borehole to ascertain if he indeed needs that 1.5hp pump.

osayuwamwen:
I have 7 pieces of 535watt jinko panel
The battery cables is 20mm positive 20mm negative the distance is about 1ft or less

bassdow:
Your location to justify the 1.5HP pump.

Also what's your installer doing about this ?

He / She ought to have accessed situation of things and updated you. That would have reduced the guessing game

osayuwamwen:
Na egbaen for upper siloku side I they for Benin city, the installer self nor expect say e nor go carry my pump

bassdow:
I don't know that state at all.

Anyways, you either use generator for pumping water, or get a softStarter. That should fix the issue. All inverters ain't same.

bassdow:
Your location to justify the 1.5HP pump.

Also what's your installer doing about this ?

He / She ought to have accessed situation of things and updated you. That would have reduced the guessing game.

Even at that, a 1.5HP submersible pump still is big for a 4KVA transformerless inverter.

if you try force am, you risk damaging either the inverter or pumping machine.

To make life easier for the poor inverter, you could try looking into getting a softStarter because even if that inverter manages to carry that pump, you go just stress the poor thing.

Can imagine the feeling after spending such money.

CuteMaro:
The problem is probably not the inverter; it's the power the submersible is pulling whether it's above the inverter threshold. For instance, most inverters power factor is 0.8kw/kva which translates 4.2kva to 3.3kw, in this case, if starting surge is above 3.3kw for the submersible due to other factors, then there is no way that inverter can power the submersible.

Good suggesting with the gen, If gen can power that submersible then it would be interesting to know the power rating of that gen.

Another observation is that the bms of the battery is 100A, and 100A for 24v system is about 2,500w. If your submersible is pulling outside that threshold then sorry it can't work either.

osayuwamwen:
The power factor of inverter is 1 that's what is stated in the inverter manual
The battery bms has a surge of 270amp± before striping off according to the manual
The Generator that powers the same pump is 7kva
I tink the issue is the inverter cause anytime I switch on the inverter the pump power in watt goes as high as 4.1kw before showing over load

CuteMaro:
What is the continuous discharge current of the battery bms?
Your submersible is obviously pulling above inverter capacity.
My suggestion would be same as above where someone mentioned to know the depth and if 1.5hp is necessary, if not, then go for a lower rated pump, maybe 1hp or 0.75hp. Because at this rate even a 5kva inverter will struggle.

CuteMaro:
The problem is probably not the inverter; it's the power the submersible is pulling whether it's above the inverter threshold. For instance, most inverters power factor is 0.8kw/kva which translates 4.2kva to 3.3kw, in this case, if starting surge is above 3.3kw for the submersible due to other factors, then there is no way that inverter can power the submersible.

Good suggesting with the gen, If gen can power that submersible then it would be interesting to know the power rating of that gen.

Another observation is that the bms of the battery is 100A, and 100A for 24v system is about 2,500w. If your submersible is pulling outside that threshold then sorry it can't work either.

bassdow:
Actually, most transformerLess (hybrid) inverters do have powerFactor of 1 hence if it's 4kva, then it's complete BUT that doesn't mean it can have the surge handling capability of those with hefty transformers.

A 24v 5kva transformerLess inverter can never give same capability as a 24v 5kva with hefty transformer even if it's same brand. Those hefty transformers are there for a reason. It's same reason their efficiency ain't same.

That something works, doesn't mean it's ideal to last long.

osayuwamwen:
The power factor of inverter is 1 that's what is stated in the inverter manual
The battery bms has a surge of 270amp± before striping off according to the manual
The Generator that powers the same pump is 7kva
I tink the issue is the inverter cause anytime I switch on the inverter the pump power in watt goes as high as 4.1kw before showing over load

bassdow:
The inverter got no issues. na Una wey dey give am load wey pass am abi shey if person carry load of 200KG put for your head, shey you fit carry am abi make we blame the load, rather than the person wey put load for your head. Funny enough, how you want ajeboo inverter of 4.2kva to carry same load wey 7kva AjePkaKo Gen dey carry.

Just continue using Generator till you upgrade OR buy a softStarter, or try the capacitor hack suggested earlier

osayuwamwen:
But if later on I change the submersible pump to 1.5hp hybrid solar pump can the inverter still power it efficiently well without struggle ?

osayuwamwen:
But if later on I change the submersible pump to 1.5hp hybrid solar pump can the inverter still power it efficiently well without struggle ?

bassdow:
A SOlar / DC water pump does not need any inverter; na just it's control box which differs from what you currently have that it uses.

Gshems:
I think another issue is the 100a continuous discharge current that can limit you if you change the pump. But you can still dismantle the battery and change the bms to a higher one

osayuwamwen:
The battery safe discharge is 100amps bms but can be discharged up to 300amps b4 bms cut off this is not bms issue sir

Gshems:
I think another issue is the 100a continuous discharge current that can limit you if you change the pump. But you can still dismantle the battery and change the bms to a higher one