I have done both connections.

mktinsight:


How do you know that you harvest more?

SolnergyPower:
Sir, the installation I am currently monitoring is on a two-storey building and needs a sky-fold er to access, so I am not planning to go there again soon until a major upgrade.

BTW, how did you arrive at 35A @80%eff?

scaffold

dragnet:

scaffold

dragnet:

scaffold

The scaffold points towards the sky so based on the technicality, he is right!

eleojo23:


The scaffold points towards the sky so based on the technicality, he is right!

Topmost11:
Pls is this li on battery? I saw it for 550 naira each. I am planning to use 8 of it to build power bank for my phones. I learnt it is sold for about 1500 each. That is why I ask to confirm before I comot myself?
This one is 4200mAh. Is it ok at the price? How much is each sold for. Thanks

For your first question, yes that is Li-ion, the 18650 (186mm by 50mm dimension) battery.

Except if it is used, fake or with a falsely declared may rating, each costs nothing less than 1,500 naira.

So I doubt the 4200mah that costs 500 naira each for that offer. Also the highest mah any quality Li-ion like NR Samsung 18650 batteries have is 3000 nah. I have yet to see an 18560 with more than 3000 mah capacity.

So that battery you have there, if new, is likely fake. At worst, a used one.

But you can test the authenticity of the declared capacity if you have a Li-ion charge-discharge meter or a rough estimate if you have a mini weighing scale to just estimate the weight and compare it with the expected weight for the declared capacity (you can get those reference values online)

Oshomo12:


Let me help out a bit. Ur 4*150w=600w @ 12v ABI?
So if ur panel orientation and cables are rightly "placed". @eff of 80%, u should not get anything less than 35A at 14.2v. anything less than that, u re running at a very big loss with ur connection. Just parallel the four panels and revert to the house(to share the good news)!

He said he did 2 panels in series for a 12v setup using a pwm controller and it works fine. Why are you asking him to parallel.

BetaTechnicians:
The load would be too much, I don't trust the relays in those timers to handle such currents.

Finally someone looked the way of my question. I had decided to go with experimentation the way I got around a couple of hitches that remained unanswered here. At least I will be glad to relay back here the success or otherwise of the experiment.

@BetaTech, I still think going with a high ampere rating than the one in the circuit will fall within safety limits. I still intend to go with the experiment when I have the opportuned time, but I still welcome more guidance as yours from others.

zeestone99:


He said he did 2 panels in series for a 12v setup using a pwm controller and it works fine. Why are you asking him to parallel.

.

omo i yaff give up, mek dem continue with whatever works for them...........................hope newbies, wouldnt go and copy wrong info

if you can tune in now.
morningstarcorp is doing a webinar and this pwm/mppt issue is being thrashed out.

https://applauncher.gotowebinar.com/#join/attendee/en_US/e0-nJLihqkTUgXqxVUs2nqZPgGG02PBQ/e0-nJLihqkTUgXqxVUs2nqZPgGG02PBQhJkvJkRHatTHYcf4XIKjQnecEmZyS6jkATXAg5x-UkqyUnQGVQWqib845unLHOvzhcYVYp2MoXk-o5iRvYq-9pekegpJwxW7Sb-lFfvEFZa9s8GfzyCAID6Vk7mSzyVAxZ_vXcMnnpaHZ0gnLjEPKmb1aeQxzwjR-HItzdtt67HR6zwExtIbSmTsMARyoD_iJJ2D8Nwhz-T3ifZniyb00cfOBcmHjXnnpC_TrEkRtCkUL8HaBB3vLE6TP5HVs0xFvkVuQHSqrpPA2tpxuqYtls37Xoz5xiyJic4PqOz8wAGxgj27k27iQWKXYMoa2C0Jo1Ltv-86VZYoP9kr0sZPe4lmLMiqgvVJBQKxY8ILE05UxSbBThSTPOaq6BiYxS0eXkRF7SyfUXWNh-5ms-nnY5drZYYuaV-AZF_9YzQMB-2R-ZDBxB8ddZVtV4jpmGsxZLPcB-zcrm4Nqn2LVHvRiLYLzdGVlhZhzghH-3rge13CBrSqbHJ3tASgM0q6er39hAsAKj_eEoPJ40cuyqg9e1T5sk8OC2OGX5gfjrl-0O6WVHVqUdoBneaLHc5x9OEHumeHHXxDJlX2QKdLVN8eHlPQ8xZ7Wpijh-45-JH6ziK6UTIZelr3CHeR1SRArtwELBmwxqRD_r9sctTzNXs576-XEm2d5OxlGikd7RKbS9JH2lELTCpz3LV7O8vLRM/7773548709664034561/843139428

SolnergyPower:
I have done both connections.

Please share stats with us.

BetaTechnicians:
Can anyone help with the limitations of modified sine wave inverters, real life experiences please, and also compared with ups that are also modified sine wave.
Real life user experiences please.

Well, generally Modified Sine inverters always output rough, jagged RMS in their AC output while PSW inverters have fine outputs. Some Modified Wave inverters have cleaner output than others and therefore can still be used within safety limits for some equipments than those with rougher outputs.

And with all modified wave inverters, while it may work with your capacitance loads or IC loads like TVs, sound systems and laptops, what you get is undesirable humming feedbacks in the circuit that manifests as lound hums from the TVs or sound system. I have experimented a Modified PWM with a table fridge once before and while it worked for a day, the compressor got unbearably hot, something I believed was due to the modified wave input from the inverter.

I have placed an automatic gate opener (with AC RMS motor) on a modified wave inverters and it worked but there is this same high humming sound that the motor makes when it works.

You can safely use a modified inverter with most rugged TVs and even with most decoders (since their power pack is external) but most other sensitive equipments may have shortened lifespan.

earthrealm:


.

omo i yaff give up, mek dem continue with whatever works for them...........................hope newbies, wouldnt go and copy wrong info

if you can tune in now.
morningstarcorp is doing a webinar and this pwm/mppt issue is being thrashed out.

https://applauncher.gotowebinar.com/#join/attendee/en_US/e0-nJLihqkTUgXqxVUs2nqZPgGG02PBQ/e0-nJLihqkTUgXqxVUs2nqZPgGG02PBQhJkvJkRHatTHYcf4XIKjQnecEmZyS6jkATXAg5x-UkqyUnQGVQWqib845unLHOvzhcYVYp2MoXk-o5iRvYq-9pekegpJwxW7Sb-lFfvEFZa9s8GfzyCAID6Vk7mSzyVAxZ_vXcMnnpaHZ0gnLjEPKmb1aeQxzwjR-HItzdtt67HR6zwExtIbSmTsMARyoD_iJJ2D8Nwhz-T3ifZniyb00cfOBcmHjXnnpC_TrEkRtCkUL8HaBB3vLE6TP5HVs0xFvkVuQHSqrpPA2tpxuqYtls37Xoz5xiyJic4PqOz8wAGxgj27k27iQWKXYMoa2C0Jo1Ltv-86VZYoP9kr0sZPe4lmLMiqgvVJBQKxY8ILE05UxSbBThSTPOaq6BiYxS0eXkRF7SyfUXWNh-5ms-nnY5drZYYuaV-AZF_9YzQMB-2R-ZDBxB8ddZVtV4jpmGsxZLPcB-zcrm4Nqn2LVHvRiLYLzdGVlhZhzghH-3rge13CBrSqbHJ3tASgM0q6er39hAsAKj_eEoPJ40cuyqg9e1T5sk8OC2OGX5gfjrl-0O6WVHVqUdoBneaLHc5x9OEHumeHHXxDJlX2QKdLVN8eHlPQ8xZ7Wpijh-45-JH6ziK6UTIZelr3CHeR1SRArtwELBmwxqRD_r9sctTzNXs576-XEm2d5OxlGikd7RKbS9JH2lELTCpz3LV7O8vLRM/7773548709664034561/843139428

earthrealm:


.

omo i yaff give up, mek dem continue with whatever works for them...........................hope newbies, wouldnt go and copy wrong info

if you can tune in now.
morningstarcorp is doing a webinar and this pwm/mppt issue is being thrashed out.

https://applauncher.gotowebinar.com/#join/attendee/en_US/e0-nJLihqkTUgXqxVUs2nqZPgGG02PBQ/e0-nJLihqkTUgXqxVUs2nqZPgGG02PBQhJkvJkRHatTHYcf4XIKjQnecEmZyS6jkATXAg5x-UkqyUnQGVQWqib845unLHOvzhcYVYp2MoXk-o5iRvYq-9pekegpJwxW7Sb-lFfvEFZa9s8GfzyCAID6Vk7mSzyVAxZ_vXcMnnpaHZ0gnLjEPKmb1aeQxzwjR-HItzdtt67HR6zwExtIbSmTsMARyoD_iJJ2D8Nwhz-T3ifZniyb00cfOBcmHjXnnpC_TrEkRtCkUL8HaBB3vLE6TP5HVs0xFvkVuQHSqrpPA2tpxuqYtls37Xoz5xiyJic4PqOz8wAGxgj27k27iQWKXYMoa2C0Jo1Ltv-86VZYoP9kr0sZPe4lmLMiqgvVJBQKxY8ILE05UxSbBThSTPOaq6BiYxS0eXkRF7SyfUXWNh-5ms-nnY5drZYYuaV-AZF_9YzQMB-2R-ZDBxB8ddZVtV4jpmGsxZLPcB-zcrm4Nqn2LVHvRiLYLzdGVlhZhzghH-3rge13CBrSqbHJ3tASgM0q6er39hAsAKj_eEoPJ40cuyqg9e1T5sk8OC2OGX5gfjrl-0O6WVHVqUdoBneaLHc5x9OEHumeHHXxDJlX2QKdLVN8eHlPQ8xZ7Wpijh-45-JH6ziK6UTIZelr3CHeR1SRArtwELBmwxqRD_r9sctTzNXs576-XEm2d5OxlGikd7RKbS9JH2lELTCpz3LV7O8vLRM/7773548709664034561/843139428

With that your link that you posted, you're not even worried about that bot that bans arbitrarily. I dislike that bot with passion.

zeestone99:


He said he did 2 panels in series for a 12v setup using a pwm controller and it works fine. Why are you asking him to parallel.

Sorry my brother, just trying to make him see that his system at that instant current of about 20A is quite disheartening If he has very good panels(Trina, Canadian, etc, of 600w at 12V I may accept 43A instantaneous current, but I will push for around 46A). For a 24v system of 510 w panel, around 26 v, I have seen/recorded 20A instant current and it was steady for about 1 min.

SolnergyPower:
Sir, the installation I am currently monitoring is on a two-storey building and needs a scaffold to access, so I am not planning to go there again soon until a major upgrade.

BTW, how did you arrive at 35A @80%eff?

This is the efficiency of the panels (min I can take), so ur 600w panel @ 80% will now be 480w (if u install tier 1 solar panels, u can get more than this). ur distance is quite high 15 m, that is when u need to install mppt controller(they are made for this kind of situation)

@bolded 480w(I*V)/14.2(V) u should get 34 A, thereabout (which is still not acceptable by me).

SolnergyPower:
I have done both connections.

SolnergyPower, you have a fundamental misunderstanding of what PWM is and how it works. Connecting your panel in series as long as it is below the maximum allowed by the controller will work but will not give you the best yield. If you connect panels in series to give 150v and connect via a pwm controller to a 12v battery, your whole pv string will produce power at 12v which will be very inefficient. What this means is that if you connected 4 panels to get 150v, then each panel is operating at 3v each. To understand why this is a bad idea you need to check the power curve of a pv panel.

On the flip side, if the panels are connected in parallel (as long as Voc is higher than battery voltage), each panel will work at 12v and have a higher yield on its power curve.

Pls check the PV voltage on the charge controller with a multimeter and see if it is the same as the battery voltage.

SolnergyPower:

BTW, how did you arrive at 35A @80%eff?

I guess since the 150w by 4 = 600w, at 80% efficiency, i.e 80% of 600w, we have 480w.

Given that the system is 12v, at bulk charging stage you should have around 14.2v for gel battery. Therefore using the Ohms law, current (I) = 480w÷14.2v = 33.80A which I guess got approximated to 35A

Edit: my bad, someone already answered it.

wilfrik200:


Please send me your contact on the email I provided

I have done that

Here us the link for the recorded morningstar corp webinar, those interested in understanding thoroughly this mppt, pwm and other solar issues should try and listen to it.
Lemme know if the link isnt working so i try another method.

https://attendee.gotowebinar.com/recording/viewRecording/7773548709664034561/4347555140372977676/aionline@yahoo.com?registrantKey=8818820329706734349&type=ATTENDEEEMAILRECORDINGLINK

ceaser:


Finally someone looked the way of my question. I had decided to go with experimentation the way I got around a couple of hitches that remained unanswered here. At least I will be glad to relay back here the success or otherwise of the experiment.

@BetaTech, I still think going with a high ampere rating than the one in the circuit will fall within safety limits. I still intend to go with the experiment when I have the opportuned time, but I still welcome more guidance as yours from others.

It is good to experiment and have first hand experience but you should do it with the metrics in mind, remember that majority of those timers were designed for AC circuits and those designed for DC and the relay in them can handle little DC currents, also remember that it takes a lot to extinguish a DC arc which is why we have dedicated DC breakers.

ceaser:


Well, generally Modified Sine inverters always output rough, jagged RMS in their AC output while PSW inverters have fine outputs. Some Modified Wave inverters have cleaner output than others and therefore can still be used within safety limits for some equipments than those with rougher outputs.

And with all modified wave inverters, while it may work with your capacitance loads or IC loads like TVs, sound systems and laptops, what you get is undesirable humming feedbacks in the circuit that manifests as lound hums from the TVs or sound system. I have experimented a Modified PWM with a table fridge once before and while it worked for a day, the compressor got unbearably hot, something I believed was due to the modified wave input from the inverter.

I have placed an automatic gate opener (with AC RMS motor) on a modified wave inverters and it worked but there is this same high humming sound that the motor makes when it works.

You can safely use a modified inverter with most rugged TVs and even with most decoders (since their power pack is external) but most other sensitive equipments may have shortened lifespan.

I appreciate the share

Penuelseun:
It is a single 260w 36v panel, with a total of 60 cells, I divided it into two making it 130w 18v outputting around 18amps from the previous 9amps

Can you please be more open with this hack, the process and more pictures or kindly point me to where there's a better tutorial for it. Thanks. I'll prefer this for some smaller setups than having two smaller panels.

BetaTechnicians:

Can you please be more open with this hack, the process and more pictures or kindly point me to where there's a better tutorial for it. Thanks. I'll prefer this for some smaller setups than having two smaller panels.

start with this https://www.instructables.com/id/How-to-change-36V-to-12V-Solar-Cell/

Topmost11:
Hjello house. Is it possible to connect 18v 10watt panel to a 12v 7ah battery via a 12v/24v pwm cc? Thanks

yes.

I believe what u are thinking is that if d system is 12v u should have panel exactly 12v. no sir. ur panel is for 12v setup while a 24v setup panels volt range higher up to 38v. now ur CC is ok. u can use it for 12v or 24v setup as far as u maintain setpoint of 50volt.

Warm greetings to all the gurus that's giving life to this thread...
Pls I need your input to get the best possible setup with the available items:
1. 40amps mppt charge controller. Find detailed spec in pix attached
2. 6pcs 200watts solar Panels. Find detailed spec in pix attached.
Spec: Vpm =36.21v, Ipm=5.11amp
3. 12v battery bank already installed

QST: what would be the best panel connection/arrangement for optimal performance.
Thanks in advance for your responses.

tchijioke:
Warm greetings to all the gurus that's giving life to this thread...
Pls I need your input to get the best possible setup with the available items:
1. 40amps mppt charge controller. Find detailed spec in pix attached
2. 6pcs 200amps solar Panels. Find detailed spec in pix attached.
Spec: Vpm =36.21v, Ipm=5.11amp
3. 12v battery bank already installed

QST: what would be the best panel connection/arrangement for optimal performance.
Thanks in advance for your responses.

I don't think your cc can handle the current that the panel can produce for a 12v system(about 60amp simultaneous current on a good day) How many batteries do you have by the way? You will be better off with a 24v system, but if you want to go ahead, you can go with a 2s3p configuration

ONE WEEK PROMO !!!

Schneider 1500va 24v pure sinewave solar Inverter .... Unit price:N68,000

Kindly Contact,
Smartcellglobal 08135031951

dragnet:


http://www.smartgauge.co.uk/batt_con.html

Bros please can you tell me which of the options in the URL would match the attached picture

Hello folks,
I ama noob when it comes to solar power technicalities but i have series of questions i would love to ask with regards solar


What is the best config to consider for going totally offgrid


I have 2 tvs about 20lights fans, 3fans, xbox, a fridge, AC conditioner some phone ports to charge how many solar panels would i need.

Based on the appliances i have how many hours on an avg can i power my house for.


Which is the best quality of solar panels to consider in the market.

Papertrail11:
Hello folks,
I ama noob when it comes to solar power technicalities but i have series of questions i would love to ask with regards solar


What is the best config to consider for going totally offgrid


I have 2 tvs about 20lights fans, 3fans, xbox, a fridge, AC conditioner some phone ports to charge how many solar panels would i need.

Based on the appliances i have how many hours on an avg can i power my house for.


Which is the best quality of solar panels to consider in the market.

You need to provide more details, will all the bulbs remain on at the same time? What's your concurrent total wattage? How many hours on power supply do you desire in a day? as it's easier to plan with those information.

That said, my quick take is that you remove those 2 items in bold from your list then your budget will be less 1m but with those 2 items, you are looking at over 2m budget to get reasonable number of hours in a day.

USA Trojan SPRE 12 225 (Solar Premium Line Flooded Battery 12V 225Ah)

Availability: In stock
PRICE: ₦140,000.00


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Model: SPRE 12 225
Voltage: 12
Battery: Deep Cycle Flooded/Advanced Lead-Acid Battery
Capacity: 12V 200Ah / 20Hr Rate

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Dimensions (LxBxH): 380mm x 176mm x 351mm

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Color: Maroon

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Contact: Smartcellglobal services 08135031951
WHATSAPP::: https:///2348170385620

ojeysky:


Bros please can you tell me which of the options in the URL would match the attached picture

it is complicated because the ones in the link are all in parallel but the one in the shared picture has both series and parallel connection.