mank1234:



You said so, dear friend when you supported wrong reading ab-initio. We only pointed out that output figure is not possible cos of efficiency limitations. Your log also suggests that, power is increased. Welcome to our side, though.

As regards, your challenge: the web server in my charge controller crashed in 2014, my laptop doesnt have serial port.

Your CC can deliver more power than it 'says' it has received from the panels.

This is because what you see on the input of the controller is not the maximum the panel is producing at that moment especially in the morning at cold temperatures and because your batteries are at a lower voltage in the morning.

mank1234:


My dear, your battery voltage reading is inaccurate and that's what is making you believe efficiency can be > 100%. Get whoever installed the gaddam stuff to connect battery sense voltage.

Having uploaded your log, it's clear that your distorted figure isn't due to glare or shading but rather due inaccurate reading.

36V system cannot charge by 10V under 5minutes.

Give me kudos when you get it sorted out.

First...there wasn't any 10v battery difference...what you are referring to is the period the controller was doing a sweep of the power curve to determine the maximum power point...you can set the frequency of this sweep with some controllers. You should that the corresponding input and output power at that instance were zero.

I did the installation of the controllers myself using the recormended sense wire gauge.

One fundamental point you guys are missing is that the input power you see on the controller is not the maximum the panels can deliver...solar panels are dummies and batteries are even dummier, the more reason why a controller is needed to match the batteries to the panels.

I'll give this example....I came home one day and saw about 300watts max generation on my CC, I went in and then switched on one of the fridges...the power jumped to about 500watts...where did the extra power come from? Of course from the same panels.

When the load, that is, the batteries are not optimised or matched with the panels, the power will be will be generated by the panels but will not be transmitted to the batteries.

mank1234:



A closer look at the log reveals something baffling, within 15min(item 15 to 19), the fluctuations in battery voltage suggest that the figures are inaccurate: up and down by as much as 10V. If it were accurate, there's no way output power will be more than input power. MPPT selects the the best power point (a point at which current * voltage of the array is maximum).

Hope you are using a battery volt sense wire and your ferrite core in place. Other than that morningstar specifically states that battery voltage reading will be inaccurate. Verify from your log that battery voltage sense wire is in place

You should also have noticed the corresponding increase in the power generated within that same period.

The down trend on the voltage indicates when my power guzzlers...two fridges and a freezer, came into the party...

I have at no time said the controller increases the amount of power generated....but it ensures you are getting the best from your panels...

I have had voltage sense cables from day one the controllers were installed.

Since you all are experts with TriStar...how about you uploading your CSV files?

DMerciful:
Imagine someone arguing fundamental physics...thanks for enlightening him....

Now...I see what JUO was saying...

How can a glare happen every 5 minutes from 8am to 12 everyday on two different controllers?

A bit of more clarity...the panels have points on their curves where voltage and current is producing maximum power...this is what your mppt controller is tracking...some CCs will show you what you would have been receiving if the mppt algorithm was not there.

Unfortunately, you guys think that's the maximum the panel is producing...

Why don't you take the challenge...upload the CSV files from your own controller if it produces any...

JUO:
your system is doing good according to the log. But your battery voltage, very critical. Enjoy sir

I'm on a 36v battery system...50% dod is 36.6V.

JUO:
bros longest time

I'm good brother...

mank1234:


Those current spikes are caused by solar glare or sometimes by partial shadowing of the panel. At those times the voltage input is momentarily greater than Vmax of the Cc (ie >150V). The controller doesn't record the short pulse of voltage which is beyond its range but it however keep record of the current which is well within it's range. That doesn't mean that that's what you're harvesting.

It's been a topic of discussion in various forums where morningstar mppt cc is discussed. You're suppose to expung those spikes to get a true picture of your system's performance.

I am uploading a copy of my log for you to see...
I will also be attaching a screenshot later...
As i have said...log your controller and covert the logs to a csv file...

mank1234:

Check attached efficiency chat from the manufacturers themselves does it buttress your assertion. If yours function as you claimed it could be that measuring circuit is faulty. Efficiency of a cc can never be >100%. We are not arguing with you; we're enlightening you. Where we don't know we seek for advice, but on this one I think we are an authority on this subject.

Looks like you have a Morning Star controller...when you have the time, log your daily harvest...make sure you select input / output voltage, input/output current and input / output power and temperature.

Before you do...check the graphs of the mppt algorithm, you will notice a slightly higher point on the maximum power current path as compared with the Isc of the panel...that point is always changing more reason the controller keeps tracking it...how should I explain the DC to DC converter in the controller that converters "excess" voltage to current to you?

I have two 45amps morning star CCs...I have logged both CCs at different times...converting the logs to excel documents for analysis....it is not a one off thing... it happened every single time I did the logging...if you have not done this logging before...you are not yet a master on this topic not to talk of an authority...

DMerciful:
Output cannot be greater than input Oga.....mppt or zppt or whatever! Na perpetual motion machine? The controller may be solid but the reading ain't right!

mank1234:
Morningstar Cc? Lol. May be yours is a Chinese copy, if you've seen such figure in yours before: instantaneous output power more than the input power.
Yes performance of solar panel dips during hot weather but that has nothing to do with cc. It's an inherent properties of solar panels.
Ignoratio elenchi.

I don't have words to argue with you both...
There is a reason why mppt is called maximum power tracking....

I'm a bit lazy tonight...I would have shared logs from my "Chinese" Morning Star CC...check the difference in the power....it's a few watts...

Guys....don't just argue....read about mppt controllers!

JUO:
even after seeing the picture? getting facts across to 'sincerely ignorant' people is like baptizing a cat

@ Juo....you should have helped your friends by telling them the CC is mppt....

This is one of the reasons why some will advise the use of mppt controllers in solar setups...

I have seen these type of figures severally on my morning star CC although this happens before midday...because efficiency of solar panels dips with temperature...

We will not devalue the naira....we clapped

We will devalue the naira...we clapped...

Talk is cheap...Reno and his boss had the chance to lead Nigeria out of the doldrums...but the results of their actions and inactions is now our albatross...

Unfortunately...we have handed the reins of leadership to a team that is been driven by a man with only a learners' permit...

iammartinzo:

Thanks bro. It will end in praise. Just be optimistic and positive. I don't believe it's attached to travel date though the travel date attached to my wife's own is June. We shall hear good news soonest IJN

Thanks...but as I have said severally, I am not particularly anxious about their response.
I have been to CA twice before and I have a trip to Turkey and the US with my wife in August with tickets purchased in Nov 2015.
So God giving us life, I still have a vacation in August irrespective of their response .

iammartinzo:
@bodejohn how far bro? It finally happened today o. They replied and Pp for my wife. Thank God. Any news from your end?

Congratulations brother...
I have not heard any information from them yet although I mailed the CIC Ghana last Friday.
Maybe they considered my application not urgent, my travel date in still in August 2016.

We need to ask the PDP what 'Change' they are talking about...abi no be the mistake we made with APC's change be that?

slim85:
Hello everyone in the house.I must confess that I love this site.Its so encouraging and educative.Myself and my hubby applied for a Canadian visiting visa with our 2 daughters.I have a job and also run a store.My husband has travelled to countries like UK,South Korea,Romania,Cyprus,Tunisia,Spain to mention a few and he has a valid residence in one of the European countries.But we have never travelled together as a family because of the nature of his job.what are our chances? we submitted a bank statement of 3.5m.we went for our biometrics April 12th and we have since not heard anything.The only email we got was that our visa is being processed and we were given a tracking number.Pls I want to ask,How long does this take because we did an internet application.Thanks everyone as I await your responses.

Processing time is about 70days or even more...

iammartinzo:
Day 67. @bodejohn how far bro?

No news yet...both applications still has final decision not started.

Without the fear of been called a wailer the OP is spot on.

The negotiation with both factions of the NLC is a pointer to the sinister motive of the government on this issue, government should not ask the labour unions to obey court orders when the president himself has brazenly disobeyed court orders.

The loosers in this game are the masses...Nigerians will one day wish they didn't participate in the decimation of labour in Nigeria.

For the records...I am particularly indifferent on the strike action.

iammartinzo:

Congrats.... I tap from ur Grace for next week... it shall be positive. @bodejohn we looking forward to next week... no delay!!!

I am not really anxious...

Whether it is released or not, i will be on vacation first and second week in August, God giving us life.
I can only be worried if my passport was with them.

shaffy19:
am so happy that its already done, apply on 13 march and my visa is ready by 10 may. Waooo GOD wat did i have to offer u, with a virgin passport. Who are those in charge wen GOD is controlling. Happy mood

Congratulations...but suppose you were denied, God no go sidon for throne again?

Let's stop taking this visa thing as do or die joor...if I plan to visit a place for vacation and I'm denied, no be to visit another place?

Abi you dey go to sidon for the place?

iammartinzo:
@bodejohn any news bro?

No news yet...I am suspecting that my bank might be dulling the process. Since my SoA is one of the documents that might be verified.

100Cents:


All of the models ?

Of course not...but this particular one is...

100Cents:
Pastor has to sow this car into my life..

If you are still in Nigeria, don't bother receiving it...it's a RHD car...

Obiwests:
Hey Guys,

I applied for Canada visitor visa via online and yesterday, CIC sent me a letter requesting for my original passport. The problem is, I don't want to travel to Lagos or Abuja. I was told I can send my passport to the Visa Office in Lagos or Abuja through UPS and I will have to pay =N=4960. My question is, am I responsible for the return envelope? or does the N4960 covers the cost of sending back my passport?

You might need to call the VFS office to confirm. I am happy to hear that there is a UPS service for the submission of the passports.

When did you apply?

I was wondering...African football was discussed in Mexico?

There was a continent....

Dear OP, how is re-evaluate same as devalue?

I wouldn't have blamed you is this was on a broadcast, would have assumed you didn't get his accent...but this is on print!!!

BERNIMOORE:
I NEVER CLAIM TO BE A HUMAN RIGHT ACTIVIST, but wait ooo; Are you saying that Wole soyinka, Tunde Bakare Femi Falana Are no more ''human right Activists'' BIG SHAME ON THEM ALLL

No one asked them to come out the last time, they did on their own conviction.

Come to think of it, most of these people can afford the luxuries of life...the common man in Nigeria should stop looking unto others for help...

You don't need a diploma or university degree to be an activist...once you set up the stage at ojota, others will join you...

They did their own bit back then...

It is your turn now...instead of calling them cowards and running to nairaland, oya...go out and begin to lead the protest...

I thought some folks accused the then opposition party APC of organising the the labour to partake in the 2012 occupy nigeria protests.

I am still waiting for the new opposition party, the PDP to organise the labour and Nigerians to the streets for protests.

Nigeria has suffered double jeopardy in the last couple of months....lower crude oil prices resulting in lesser income and weakening naira....even lower purchasing power.

Governance is not static and a position or decision taken yesterday might not suffice for the realities of today. Hence the people against fuel subsidy removal four years ago can be in the fore front championing it's implementation now.

I cannot even see the removal as the solution to the perennial scarcity of petroleum products...we need to see our regulatory authorities doing their job ensuring the quality of the available products and accurate dispensing pumps.

I have a very clean note 4 with all accessories...rarely used.

WhatsApp only...zero eight zero six two one eight four seven six four...

Vivychi:

Thanks. She got her package today and was denied

Waoh....so sorry to hear that, for some others, the waiting continues....

Chai...looks like dey don comot baba leg true true o...