Thank you but remember that the one with Vmax 100V is 40A. Will the 2S3P not going above the CC current?

dapsyra:


The only safe option is to use the 100v CC in a 2S3P array as 3S2P arrangement will also exceed the Vmax for the CC




If you use 2S3P format, the array VOC might go above the 70v Vmax the CC can tolerate especially in cool days. This is a sure recipe for disaster.

I hate this kind of CC that won't allow manipulations. The last thing to do is reduce the panels to 4 units and look for another 2 units to hook up the leftover. Any suggestions?

ojeysky:


I will use the one rated 70v and do 2s3p

I hope the Voc of the panel will not go against the Vamx of the CC at a peak sun?

I have 6 units of 275W panels, Rated voltage 30.9V, Rated current 8.91A, VOC 38.8V, SCC 9.47A and Max system voltage 1000V with two different CC 12/24/60A VMax is 70V, while the other is 24/48/40A Vmax 100V. Which of the controller is the best to handle 6 panels and at what configuration of the array, 2S3p or 3S2P?

mktinsight:


Where can one get Yingli?

Come to 4 Oye Balogun, Lekki phase1 for your Yingli panels. We have 310W Poly and 275W mono. Enter freedom way and ask of Car wash or Itedo.

I have been thinking about these specifications for long but today I will drop the question so that everyone can benefits.
Please, all the gurus in the house should help and answer these questions. I can say about a few here.
What are the uses or the pros and cons of the following specifications on this solar panel picture below? Thank you.

I have 24V inverter now. Is it possible to charge two batteries in series with 24V2.5KVA without issue? They are new batteries. I want to charge before installation

ojeysky:


For LFP? I have some adjustable current and voltage 12v 50A chargers that just came in. It's 50k each.

For Gel lead-acid battery. I hope the one you have can charge the battery very well. I want to use to charge new batteries before installation in order to avoid story that touch. Can I have your price?

Please I need prices for the Best Standalone battery charge with auto cut-off and a good multimeter with DC amp reading up to 40A-50A or meter and battery tester. Thank you

Any reliable dealer here should help me with the price of Solar Street Light with adjustable LED& holding arms. It is urgent, please. Different wattage and prices and the ideal pole height and price too. Thank you. Please don't put too much price because we are all hustling. Just what you are selling it. Thank you. Waiting for responses.

mcTrinity:


Hi Ojtech,

First, you missed out quite some details.. You didn't specify if it's hybrid inverter or standalone.
I also want to assume that the battery bank is a combination of 12V 200Ah batteries connected in series.

You also didn't specify if the Inverter was actually outputting the 40A during the observation... Might be possible it's not. And also the quality of the Mains voltage

However, though it's new, how long it would take depends on the state of the battery.
I bought 8 set of Quanta Batteries last 2weeks for an installation. I put all through an independent pre-charge, which I normally do before installation. Each of them took between 8-10hrs to go from boost charge (@250-260W) to Float Charge (@30-35W). And yes, I monitor each using a Socket-plug wattmeter. Few of them were September 2019, while others were October. Been sitting in warehouse for quite a time, and I believe that's why they took that long to go through the charge stages... Otherwise, it usually take 3-5hrs

So, there are factors that could make it take that long. You could provide any other detail that might help

Lastly, I want to believe that those batteries are AGM or they are actually designed to handle such amount of charging current. 40A on a 200Ah Battery bank is quite big... That is if it's charging through Mains supply irrespective of whether there are powered loads or not

Cheers

It is an Inverter with the charger not hybrid because it doesn't have inbuilt CC.

The battery is actually 2 pieces of 12v200AH in series.

My meter can't measure amp up to 40A.
The voltage is not stable but it around 220V-230V

The batteries were in the warehouse for long but I did charge them individually panels 3 pieces of solar panels in parallel with 12v/24V 60A Cc VMAX of 70V

The batteries are gel. Are you saying I should reduce the charging current to 50% or 80% for initial charging? Because there is nob to adjust the charging current.

What I did today after the troubleshooting when I used another inverter with computer display to check the frequency, input and output voltage. I discovered that the voltage didn't go beyond 24V for the bank. After disconnecting everything it became 11.9 volts for each battery. I changed the battery and the system is charging normally now.

I don't know why the voltage stopped at 24V.
Best regards!

ojeysky:


Normally you require 5 hours to fully charge 24v 200AH at 40A so it seem like a normal behaviour since you said you have load concurrently. It then depends on how much load you have concurrently

Thank you, Sir. I sent pm already but you please Dm me your WhatsApp number or contact me on zero eight zero six four one one five nine six four. Thanks

ceaser:


• Is it on load (in use) while charging?

• Is the inverter those types that prioritize solar charging over grid charging or vice versa? Also some integrated in writers like that will not charge batteries if the voltage from the grid is low (like the low current NEPA is fond of)

• Also you may want to get a meter to measure the current flowing thru the wires from the inverter to the battery, at least to be sure that current being fed into batteries is adequate to bring it to float as you expect.

It is on the load while charging.
The inverter only has a setting for current adjustment and battery type selector. No display but it has led to show different performance inverter on, fast charging, and float charging etc
The voltage is high enough and the charging indicator is on but not going to full charge or float charge state. Thank you.

Good Morning, everyone. New Bank of 24V200AH not reaching float with 24v1.25kVa inverter and charging current of 40A for 5 hours. Please help.

Good day, everyone. What capacity of Inverter can handle 1kw radio transmitter efficiently without issues? I was suggesting 5KW inverter.
Secondly, Can one single phase Inverter be loop to power 3 phase appliances?

mank1234:


I'm sorry sir. It will not happen again. It was intended for comic relief and not to cast aspersion.

On contactor wiring
https://youtu.be/_pzBBRjaw0M

On contactor purchasing
https://a.aliexpress.com/_BPGTy0

Thank you!

mank1234:


He said he is a DIY enthusiast.
He derives joy in doing it from scratch.

I would have expected him to buy coil and build a relay and then take it from there. Or better still produce coil then use it to produce a relay.

This criticism is not healthy for this forum. You should have come up with your own ideas and design. We are here to learn. Nobody is perfect. We want to learn how to do the contractor type. Thank you!

ceaser:


What's the price tag?

The lowest is 575K

garbamaza:


I came across this home solar air conditioner, purely operated with solar panels without need for batteries. Gentle men, I need your suggestions about this product.
Thank for your possible urgent responses.

It is actually working as stated. We have in stock here in Nigeria. Lagos Lekki phase1 to be precise.

earthrealm:


i mean panel to cc.you need 35mm, if you line up the panels in 4p1s
since Voc is 100v, change the setup to 2s2p...and observe, 10mm is the recommended cable size, 6mm, you will have some losses.
ooh, looks very big to be just a CC alone, for a 20m run, that your design is wrong for the system you outlined above, it would be performing sub optimally,

Resistance increases with length
The reason different wire lengths bear different ratings is because the electrical resistance builds up as the cable gets longer. At that point, up-sizing the power cable will restore the voltage to its intended level.

Acceptable Power Loss
Undersizing the wire size will result in excessive power (watts) being lost in the wires rather than delivered to the load (battery bank, inverter. Typically we recommend the power loss below 5%.

Voltage Drop
A 5% voltage drop causes an approximate 10% loss in light output. Voltage drop causes a nearly proportional drop in light output. A voltage drop greater than 5% will reduce this necessary voltage difference, and can reduce charge current to the battery by a much greater percentage. Our general recommendation here is to size for a 2-3% voltage drop. If you think that the PV array may be expanded in the future, size the wire for future expansion.

Don't choke the flow of power
On the other hand, installing too large a wire gauge doesn't really have a downside, but there is the potential for better performance. Obviously, there's no need to buy 2-gauge wiring when 10-gauge will do. That kind of overkill would be a waste of money. But if the calculator could lean either way between two sizes, going with the larger wire size would be the smart choice.

Wow... Truly I left the wire size unnoticed. Instead of going for another wire, I will prefer the 2S2P for now. I will provide feedback on the performance. Thank you very much. [/quote] I did as you stated and there is now a great improvement. But the Max input voltage is 70V. I don't know if it can handle the voltage from the array when the sun is at peak

earthrealm:


Oh, its a hybrid inverter.
Chk the manual..the corresponding voltage setpoints for the diff battery types should be there..

275w x 4 in parallel and over 20m cable run..hmmm.thats over 34amps @ 24v
You need 2awg or 35mm cable..

Obviously you can see that whosoever designed this setup is deficient in basic solar wiring fundamentals

However all is not lost, changing to 2s2p connection, would allow you use 10mm cables

What is the max Voc of the CC?

once again thank you. The picture there is the cc. It is not a hybrid inverter. What is on the manual is just the battery type selector which I selected correctly.
Are you referring to battery cable or the wire from the array? Because I used 35mm for battery and 2 core 6mm wire for the panels.
I did the design and it has worked for other cc.
I will go for advice on 2s2p
The max VOC is around 100Vmp.

ceaser:


I think the CC should have a way of programming the parameters. That's where you should make the charging value change.

Then since it's apparent that the CC is PWM, using an inappropriate panel to CC guage wire for very long distances could also impair on the total charging voltage reaching the CC.

2 units 200ah battery; I hope your 4 panels are at least 320 watts each o, for enough daily harvest.

To make things easier, maybe you can upload the pictures of the CC for guys here. You might find someone with experience with the CC.

Thank you. The distance is 20m from the roof. The panels are 24V275W each. It is a yinglin product. Find the attached picture of the cc below.

earthrealm:


4 x 24v panels in series!!!
250w panels?..
Thats risky, as that would be exceeding the Voc of the avg CC, wch i suspect would be 100v for that Your CC...pls confirm this...
In the interim..would suggest you change it to 2s2p asap..

2ndly, wch kind nonsense CC would only have battery selector, there should be a corresponding chart showing the voltages attached to each batt type. Upload a pic of this CC. Am beginning to suspect, it may be a pwm Cc!

Hence the max Voc may even be 50v or 60v.
Send pics showing the spec of the cc & another pic showing the front display.

Thank you. Sorry, the 4 panels are in parallel not in series.

earthrealm:


the charge voltage settings is not set correctly, doesnt matter if its pwm or mppt. check the settings and set it properly

Thank you for this response. Is it CC? because the CC only has battery selector. Nothing like charging voltage. It is 12/24V60A and 4 24Vpanels connected in series. The inverter is 24V and the two 12V200AH also in series. What am I doing wrong?

ceaser:


Perhaps the panel cut off voltage is not set to the appropriate max to charge the batteries to the max voltage.

The reason it starts charging the moment load is put on it is because the battery voltage drops below the "panel off" setpoint when load is put on the inverter, hence the CC at that point permits voltage to go into the battery from the panels.

You might wanna check this "panel off" voltage out.

NB: the term "panel off" Is not a universal term and it may be represented by a different phrase on another CC.
Check that out.

Thank you for this. I parallel 4 24V panels, the inverter is Also 24V, 2 12v200AH battery in series , the CC is 12/24V60A with only battery selector and LEd indicator for power and charging Mode. Can this configuration caused it?

I installed a particular MPPT Cc but it doesn't charge battery continuously like the usual mppt cc. This one will send a pulse and stopped when you put ON breaker. It did continuous charging when on load but doesn't when not on load. Meanwhile the battery is not fully charged. Do you think it is an MPPT CC or PWM CC?

spartacus11:


Where did u buy from. I need ohhhh

We have plenty of them in stock.

Good day, everyone. What capacity of Inverter can power 1KW transmitter conveniently without issues? I was suggesting 48V/5KW

Good evening, Everyone, I am planning to install breaker between 48V 200AH battery bank. Which is the best breaker to be used at the position?
Another question; What is the cause of one battery in 48V200AH bank to deplete to 7V while others are still reading 12V each? The Inverter Positive was connected to the bad battery in the bank. Thank you, all. WAiting for urgent advice.

earthrealm:


errrm, i think the first advice is: placing 10kw load on a 48v 400ah bank is a big NO NO.
Using C/10 rule, maz load you should place on the bank is about 2kw. for lead acid battery, even LIPO4 bank may not be able to handle such a huge instantenous load.

even if you counter and say the panel will handle the load, you and i know that panel harvest isnt steady, cos you need to be assured of steady 8kw minimum from the panels to surport the bank to carry the load at all times

Which one is C/10 rule? Are you referring to battery C value?

Assuming I have 15KVA inverter and 48V/400AH battery bank.
How many panels will charge within 4 hours and sustain a load of 10KW during sun hours?

I pay tithe because I know that being alive is by the Grace of God. I don't mind if someone is eating the tithe or not, that one is between them and God. I'm glad that some people are helping me to give to the poor not minding my presence. I know my church and the kind of pastor I have. My Church has been doing wonderfully well in this hard time for the less-privilege people. Paying of a tithe is not voluntary. The journey of life is an individual effort and not a group affair.

Like I have said before. They have jumped start their tradition in sacking Emir Sanusi and all those prominent men were involved in one way or the other.