NewStats: 3,265,106 , 8,185,677 topics. Date: Friday, 13 June 2025 at 01:15 PM j4365

Ground mounting is awesome....a lot of advantages. Now, the sun moves from North to South on 6months basis so any experiment/observation must be done for 12months when the sun must have moved from south to north and back and plotted on a graph so as to know the performance versus the sun longitudinal movements. The s gives the maximum possible harvest when they are at 90° to d sun at any instantaneous time. If you leave ur they way they are and observe, I promise you within 6months u'll see about 14.7amps again. You can also research d effect of temperature on harvest.

Oshomo12:

I wanted to initially, but my roof was steep( I feared the wind issue, so I stopped). What I should be getting from the should be around 17.9 amps @ around 7-9 deg. But after I factored in the losses due to the angle, I should have about 13-14 amps. But never got that, as in never saw it once!
After the test, I decided to give good spacing, the angle reduced by just 6 ie from 26 to 20 deg. I get around 13.5~13.9 amps now, never saw seen 14.7 amps again. So I ve decided never to use roof mounting for my s again, cos my target is to get around 3000 watts of s. So ground mount is what I will do now.

6° is a lot if you're coming from a wrong angle installation towards the right angle installation. If ur point of application of a force on a body is 6° and you increase by 6 to 12°, check d resultant force if d resultant is not reduce considerably. That's how light ray behave!

Oshomo12:

I wanted to initially, but my roof was steep( I feared the wind issue, so I stopped). What I should be getting from the should be around 17.9 amps @ around 7-9 deg. But after I factored in the losses due to the angle, I should have about 13-14 amps. But never got that, as in never saw it once!
After the test, I decided to give good spacing, the angle reduced by just 6 ie from 26 to 20 deg. I get around 13.5~13.9 amps now, never saw 14.7 amps again. So I ve decided never to use roof mounting for my s again, cos my target is to get around 3000 watts of s. So ground mount is what I will do now.

DMerciful:
Going emotional . Like I said temperature affects but around 5% and not 40%.My s are mounted on d fence with all d airflow possible but then I have compared my harvest with guys of same capacity installed on d roof and d difference is marginal.

Not that, this is what I saw, u said not possible. So I agree with u. But, if it's just as little as 5% of loss due to spacing, why trouble urself spacing? One can leave with that!"

DMerciful:
Ground mounting is awesome....a lot of advantages. Now, the sun moves from North to South on 6months basis so any experiment/observation must be done for 12months when the sun must have moved from south to north and back and plotted on a graph so as to know the performance versus the sun longitudinal movements. The s gives the maximum possible harvest when they are at 90° to d sun at any instantaneous time. If you leave ur they way they are and observe, I promise you within 6months u'll see about 14.7amps again. You can also research d effect of temperature on harvest.

Sorry for not making myself clearer, Feb was exactly one year I installed those s, and 9.4amps was the max seen within the period of a year. I did the test this year Feb. I have a record of the max of each month thru out this period. I take my records between 12:10-2:20pm

OK....will check this to confirm how much improvement with temperature reduction.'weldone

Oshomo12:

Sorry for not making myself clearer, Feb was exactly one year I installed those s, and 9.4amps was the max seen within the period of a year. I did the test this year Feb. I have a record of the max of each month thru out this period. I take my records between 12:10-2:20pm

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mcTrinity:
Good day house
please, I need Solar world or suntech... nothing less than 300w
price please...
thanks
cheers

@mcTrinity

I have got the SUNTECH 310W Poly if you are interested, let me know.

You have a mail boss.

Refa:
I missed your post. I am really excited that someone located in the GH is also interested in Solar and is on this platform. I will be very happy to link up. refa.dodowa at google mail.

Who could help point me in the direction/video on insulating lighter load to th inverter from a distribution board DB,

I would be very grateful,
Thank you!‎

bodeface:

@mcTrinity
I have got the SUNTECH 310W Poly if you are interested, let me know.

price?

Seun, the highlight doesnt work anymore. I have noticed this for few months now or is it just me?. By highlight i mean to enlarge text (Font size). Whats going on please?


Let's see if this work.

Example:

[size=15pt]Seun[/size]


See that?. It doesnt work

.

bigrovar:

Yes the Fangpusun does not use clock to for its log. It has a complex algorithm of determining day and night. I feel it is designed around when sun is up aka when it is charging and when sun is down aka when it is off.. A charge circle is read as day one. It pretty much works and has allowed me keep a log of joy harvest since beginning of this year pretty much. Although it will not give you real time minute by minute log function like those found with Midnight classic. However that function can be added for as little as the $35 it would cost you to buy a raspberry pi 3


My too I just got a new freezer o. This time a thermocool. Got one yesterday. Still observing the thing. First test once I unpacked was not encouraging. Was using about 240w. The LG it replaced was a bit bigger at 175l this one is 166l. The later uses 150w and this thermocool uses 100w more than the LG. I still dey observe sha. And yes mine too was frosting from the bottom up.

So it turns out these freezer settles down real quick. I brought my watt meter from work and after an initial starting stage surge of 240w (not to be confused with start up surge) it settled down within 30 minutes to 115w which is quite OK for me.

bigrovar:


So it turns out these freezer settles down real quick. I brought my watt meter from work and after an initial starting stage surge of 240w (not to be confused with start up surge) it settled down within 30 minutes to 115w which is quite OK for me.

That's good, from 240w to 115w within 30mins. It quite efficient, thanks for reporting back, cos fear don de catch me. I have the same freezer too.

mcTrinity:


price?

@ mcTrinity

Sorry getting back to you late, the price is 80K, let me know quantity, might be able to get better offer.

bodeface:


@ mcTrinity

Sorry getting back to you late, the price is 80K, let me know quantity, might be able to get better offer.

thanks... you've got ?

Hello house.

Please advice.

Between Mppt and PmW charge controller, which should I use and why?

Thanks

bigrovar:


So it turns out these freezer settles down real quick. I brought my watt meter from work and after an initial starting stage surge of 240w (not to be confused with start up surge) it settled down within 30 minutes to 115w which is quite OK for me.

how many liters is it?.
swapped the samsung for an LG 245LITER freezer, it frosts from top to bottom, unlike the 260L samsung, initial readings after 10mins was about 130w, but subsequent readings after power outage is abt 115w after 10mins....it dropped as low as 96w after being on for >24hrs.
It has a 1amp energy nameplate

@davodyguy, you may have the google it or scroll thru the middle of this thread. this issue hv been analysed several times

davodyguy:
Hello house.

Please advice.

Between Mppt and PmW charge controller, which should I use and why?

Thanks

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bigrovar:


So it turns out these freezer settles down real quick. I brought my watt meter from work and after an initial starting stage surge of 240w (not to be confused with start up surge) it settled down within 30 minutes to 115w which is quite OK for me.

This 374L made in Romania freezer produces Frost / block like crazy and is also energy efficient.. You guys can give it a try OK !

Bought where pls?

kiekie1:


This 374L made in Romania freezer produces Frost / block like crazy and is also energy efficient.. You guys can give it a try OK !

kiekie1:


This 374L made in Romania freezer produces Frost / block like crazy and is also energy efficient.. You guys can give it a try OK !

Beko is a well trusted​ name when it comes to freezers and to me it is still the best in the market so far.

Use MPPT......Mppt harvest Ur 25%-30% more than pwm. Its the latest on charge controller technology... Its like Comparing CNN with NTA

davodyguy:
Hello house.

Please advice.

Between Mppt and PmW charge controller, which should I use and why?

Thanks

DMerciful:
Use MPPT......Mppt harvest Ur 25%-30% more than pwm. Its the latest on charge controller technology... Its like Comparing CNN with NTA

Thanks.

I was told to use PMW, since I don't inter to use more than 4 s

Unless u re OK to loose 30%

davodyguy:

Thanks.

I was told to use PMW, since I don't inter to use more than 4 s

davodyguy:
Hello house.

Please advice.

Between Mppt and PmW charge controller, which should I use and why?

Thanks

If you system is above 150W ... Think MPTT...


Alright let's start with conversion from to battery Efficiency.. PWM is 80% while MPTT is close to 100%
If a supply 100W PWM gives 80w... Cos you will have same current.. but your Extra voltage is wasted..
MPTT converts extra voltage to Current...

2. Cable sizing, example 3 150watts is 450watts.

if you use PWM higher cable guage is required you will use parallel connection meaning increase in current.. 18V @ 25.2A 8awg is required


with MPTT you can connect 3 150watts in series that will make 54V @ 8.4A you can use the 12awg or 10awg

mcTrinity:


price?

Suntech 310W Poly @ 80K, large purchase subject to discount.

davodyguy:

Thanks.

I was told to use PMW, since I don't inter to use more than 4 s

Alright.. don't complain about performance after installation sha....

What is the PV system watt and battery system Voltage? The installer might have his points..

What other points​ did he mention aside 4 s?

Dam5reey:


Alright.. don't complain about performance after installation sha....

What is the PV system watt and battery system Voltage? The installer might have his points..

What other points​ did he mention aside 4 s?

[quote

Dam5reey:


Alright.. don't complain about performance after installation sha....

What is the PV system watt and battery system Voltage? The installer might have his points..

What other points​ did he mention aside 4 s?

See my response below

Inverter is 1000 watts 12 v

2* 200amps battery
Connection in parallel

Intend to use
4*200 watts mono Frame s

You guys can advise better

Thanks all

DMerciful:
Unless u re OK to loose 30%

davodyguy:

See my response below

Inverter is 1000 watts 12 v

2* 200amps battery
Connection in parallel

Intend to use
4*200 watts mono Frame s

You guys can advise better

Thanks all

In this case.. PWM will be a waste of resources....

For better efficiency.. if you are not looking at cost go 24V battery Voltage system with 40A MPPT controller....

Your 800W will provide approx. 60A @ float charge of 13.8V. you will spend more in this case... Since 60A MPPT controller is required...

Go with first option.. otherwise​ you can go with your installer,

DMerciful:
OK....will check this to confirm how much improvement with temperature reduction.'weldone

You can calculate the expected performance of your s and then compare to the field readings. PVGIS gives very accurate values to the P10 probability[sup][/sup] ( +-10 % ) within actual prediction

http://re.jrc.ec.europa.eu/pvgis/apps4/pvest.php?lang=en&map=africa