₦airaland Forum

dollarnaira:
On a serious note, is there a major difference between buck converter and pwm?

Both are pulse( pwm- pulse width modulation) in nature. They both push in current for some seconds and stop. The process continues again....

Obnoxious2001:
My oga 🙌🏾🙌🏾🙌🏾.

Make I come learn work.
Which side you base?

I sent you message on WhatsApp some months back.

Trippledots:
😊 I like when I read posts from informed minds. You really understand how buck and mppt controllers work.

I have a conceived a way of making a normal PV to buck converter work and hunt for the MPPT point. Theoretically and maybe partially practical since I have tested the idea partially. Unfortunately I no de get time these days to play with electronic equipments as I like.

ksmart027:
If i get you correctly, with the buck converter, can i still use a single high watt panel? My major concern is space as i will prefer a single high watt panel to multiple low ones. Thanks boss.

ajabani4allah:
That part "put off the inverter" pls can you shed more light on this? I have a 10A 8pin DIY relay I am using but it can only transfer the load but not put off the inverter. Can the relay achieve this? I need something that can also put off the inverter when I am on grid to save my battery from ideal power consumption of the inverter

Trippledots:
An inverter AC
Clamp Metre
Sachet 5kw pure sine.

Trippledots:
My sachet inverter when pulling about 600va AC load, draws about 1kva DC power. That's about 60% conversion efficiency. Ambient temps was in the high 30°s though.

Has anybody actually measured their DC to AC conversion efficiency? I'ld like to know what they got. 🤔

earthrealm:
what u seek is almost impossible to find as a single unit...48v 1500w, minimum 48v i have seen is 3.2kw
only option is to buy separate 48v charger and satchet inverter 48v

Obnoxious2001:
Okay.
All this our many speculation

You do electronics?

Obnoxious2001:
I agree with all except the battery part
(Cc and inverter are both connected to the battery. In situations where inverter self is not working, it still used to be affected by lightning)

Obnoxious2001:
I don't think this is why.

The question is how come is controller MCU architecture more protected (even in thunder strike, you don't need to reset it).

Aside from drivers flashing (this is probably as a result of over voltage) Na that MCU be the main thing

dollarnaira:
What am saying is it doesn't work with all inverters.

bassdow:
Current is NEVER TOO MUCH because the applicance draws what it needs.
It's Voltage that CAN BE TOO MUCH because it flows into the connected device.


in other words, if a phone's charger is rated 5-volts 2A , you would have no issue connecting it to a charger rated 5-volts 400A. BUT no make mistake connect am to charger of much higher Voltage.

ojeysky:
This thread is to share/learn experiences and what you say here is very important as it may help someone else positively or otherwise. Please have a open mind to correct what you had thought was the right thing.

1. No lithium cells comes with a BMS
2. A 5v with 400A source connected to a phone will sure blow it up as the current limiting diodes will fail at some point if not immediately
3. A lead acid Max charge current needs to set on the charger to avoid spoiling the battery
4. Lithium has a higher C rates with most of them being able to do 1C hence you have a lot of window to play around with subject to your installed BMS max

Ultimately as we say on stock thread, readers are adviced to apply due diligence on what they read here.

All the best

Dam5reey:
There is a limiter, that has a rating it can handle..if you exceed the limiter's capacity, you are on our own.

I have blown up devices based on your assumptions.

Queed:
Most phones will only pull just what it need at that 5V

Dam5reey:
All information is wrong..

Battery that does not have BMS cannot limit the charge current..

Also don't attempt to connect a 5V, 400A, 2000 Watts into phone. You will smoke the cable as well as the phone as there is a power limit the board can handle.

brightk:
If there is anything called grade e cells i think it will fit into the category of cells you sell to unsuspecting victims. You cant eat your cake n have it.

bassdow:
if you studied Electronics, or have background knowledge of such, or even did a little research, you would have known better.


why you think most electronics that used to be BULKy, are now much portable ?

bassdow:
You trying to compare 2 different things / terms.

1. There's Hybrid vs non-hybrid inverter

2. There's Transformer vs TransformerLESS inverter

A "transformer hybrid inverter" is one that CONTAINS a TRANSFORMER, and has a Built-In chargeController.

An inverter with TRANSFORMER is HEAVIER, more rugged, and could withstand more abuse such as Sparks, Spikes, surges, etc, than TransformerLESS inverter which are more portable, NOT Heavy, but LESS rugged.

TransformerLESS inverter, is popularly called Sachet inverter.
TransformerLESS inverter, uses MOSFET, and other semiConductors inStead of a transformer. They are more energy friendly - i.e they don't unnecessarily waste current via magnetic fields since they have no Transformer Coil windings. But they are less Rugged and Less Durable.

TransformerLESS inverters, are much CHEAPER than Inverters with TransFormers of similar spec.

Prince3030:
Please is there any ready made power box with solar that can carry a load of 250watt for atleast 6 hours? Anyone has an idea?

NiyiOmoIyunade:
Ah! 1.5hp AC on a 3.5kw 24v HF transformer based inverter is plenty o

As you may know the HF inverters do not like inductive loads - they have virtually zero surge handling and what they do have is usually for 1 or 2 cycles - read like much less than half a second - although you may have an inverter AC, the variable speed motor will still present an inductive load. The physics limitations of switch mode power supplies must be respected as in an HF inverter lacking a large iron core/toroidal transformer they perforce cannot handle the surges and transients created as inductive loads go on and off (when your AC compressor picks up or cuts off). The ability of your inverter to handle surges and transients is directly proportional to the amount of iron present in the transformer due to something called the 'flywheel effect' . LF transformer based inverters rated for large loads have plenty of iron (more than needed for the application) in their transformers and the FETs switch much slower (hence low freq) and are often large sized and designed to run much cooler - all these factors surges/voltage spikes & transients/ back emf/reverse current/flywheel effect running temps etc impact how well your inverter does with surge loads.

In simple English most budget HF inverters are sorely lacking in the internals needed to run those large and problematic loads robustly for a long time.

There is also the issue of large loads on a 24v system - it is amps flow that makes cables and power electronics heat up which is why you may have seen your fan run more than you expected.

2,000w load on your 24v nominal LFP bank is 75a flowing through the inverter DC bus - even in a premium system 75a is significant energy flow talk less of a budget el cheapo with lower grade components.

I think you may have pushed the device beyond it's real hardware limits. It is not uncommon for the capacities and tolerances of el cheapos to be overstated.

Hero2t:
You can buy 100ah lithium battery for around 140k - 160k and an inverter like 1.2kva tbb for 86k or any other compatible inverter and add solar later.

dollarnaira:
But Valto have dem ever since

Dondbuzor:
Pls I need an answer. Embedded systems and programming which one has more opportunities(profitability) in nigeria.
With reasons plz

Hello buzzor hope you're doing fine.
I am at this stage currently and it's pretty much overwhelming
I am very good at embedded systems and complex electronics (both theoretical and practical) and I have done a number of interesting projects too.
Just that there aren't much opportunities for embedded engineers in Nigeria which is really discouraging. Most people I know that are into web/ app design are doing quite well, and I having this urge to switch to web.

Please I beg to ask, which option did you choose and did it favour you?
Or you could just give me an advise

NiyiOmoIyunade:
Ah!