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Kindly Help With My Solar Energy Set Up. by AfroBeatDiary: 11:14pm On Apr 17, 2021
I have 2pcs of 200w solar panel and a 12v 200w battery. The panels are connected in series and it has burnt 2 charger controller so far. The charger controller are the same product, 30ah.

I've checked online and did some little calculations and realised I need a bigger ahms charger controller as the energy itself is 33ah so an article online suggest a bigger charger controller but I need a specialist to help with information and ideas before I go ahead.

My reason for going for 200w panels is because I want to completely switch off from the national grid and I take my time to upgrade my battery bank.

Kindly help push on front page.
Re: Kindly Help With My Solar Energy Set Up. by AfroBeatDiary: 11:18pm On Apr 17, 2021
This is a picture of the second charger controller burnt this afternoon. Got it today, burnt today.

Re: Kindly Help With My Solar Energy Set Up. by matify83: 1:42am On Apr 18, 2021
The specification of the PWM charge controller for voltage reads 50V maximum.

Tying 2 pieces of 200W solar panels in series would give a current that may not exceed 10 Ampere on a good day which is still below the 30A rating of your CC.

But because voltage is additive in series connection, you are most likely to going to "cook" any charge controller with input voltage less than or equals 60V, which you have done twice.

An average solar panel ( your type) produces approximately 30v on a very sunny day ( connect a voltmeter across the terminals of a single solar panel around 11am to 12 noon on a bright Sunny day to confirm), so connecting 2 of such in series has surpassed your charge controller's max. Voltage input.

You would have faired better connecting your panels in parallel to maintain the voltage at max. 30V and increased your peak charge current to near 20A which will charge your battery faster.

If you must maintain the series circuit, then just get a 60A mppt charge controller as you can expand on it in future.
Re: Kindly Help With My Solar Energy Set Up. by incogni2o: 7:39am On Apr 18, 2021
I guess you misunderstood the series/ parrallel connection thing.


Series adds Voltage.
Parrallel adds current.

Also dont make the mistake with your battery Bro,

So you wouldnt spoil your inverter.

That will be a more costly mistake.


DIY is good and I'm a huge fan of it too, but you have to be far more careful. We learn everyday though.

Thats why when you pay a professional, it's the experience you are paying for, not the knowlege.

Last two weeks I broke thru the floor chasis of my car while trying to jack it up to remove the silencer for exhaust leak repair. It was painful but it's part of experience. I finally fixed it with some help though.
Re: Kindly Help With My Solar Energy Set Up. by Yemmyteespeed007(m): 6:00pm On Apr 18, 2021
You probably want to connect them in parallel.

Since your battery is 12v.

You're the one spoiling the charge Controller.
Re: Kindly Help With My Solar Energy Set Up. by MrTony32: 12:06pm On Apr 19, 2021
AfroBeatDiary:
This is a picture of the second charger controller burnt this afternoon. Got it today, burnt today.

You can solve the problem by

Firstly Your solar panel will be connected in parallel

Secondly don't connect solar first to controller but battery first.

Though your panel supposed to be 150w or 180w because your battery and inverter are 12v single and so your solar panel must be 12v that y u can't series it when you do that it will burn the controller because you are exceeding the voltage and power the controller can handle.. always consult an expert before try risky things.

You can check my other post on my page

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Re: Kindly Help With My Solar Energy Set Up. by AfroBeatDiary: 4:55pm On Apr 20, 2021
MrTony32:


You can solve the problem by

Firstly Your solar panel will be connected in parallel

Secondly don't connect solar first to controller but battery first.

Though your panel supposed to be 150w or 180w because your battery and inverter are 12v single and so your solar panel must be 12v that y u can't series it when you do that it will burn the controller because you are exceeding the voltage and power the controller can handle.. always consult an expert before try risky things.

You can check my other post on my page



Thanks so much, I'll resume back to it once I get home. I really appreciate.
Re: Kindly Help With My Solar Energy Set Up. by Tonytequeenergy: 11:02am On Apr 21, 2021
AfroBeatDiary:


Thanks so much, I'll resume back to it once I get home. I really appreciate.
Let me know your feed back
Re: Kindly Help With My Solar Energy Set Up. by AfroBeatDiary: 11:59pm On Apr 22, 2021
Tonytequeenergy:

Let me know your feed back

Thanks buddy, I wired the panels in parallel and currently using an analog charger controller, I realised the battery doesn't exceed 13.3 unlike the other charger controller that got burnt, it reaches 14.4
Re: Kindly Help With My Solar Energy Set Up. by matify83: 3:44pm On Apr 26, 2021
AfroBeatDiary:


Thanks buddy, I wired the panels in parallel and currently using an analog charger controller, I realised the battery doesn't exceed 13.3 unlike the other charger controller that got burnt, it reaches 14.4


At 13.3V charge voltage, you may never bring up your battery to a full charge. You will be murdering your battery ( Sulphating) in slow motion.

Check your battery charging specifics.

Most AGM batteries go as high as 60A cycling current and about 14.8 to 15V cycling voltage to get your battery to FLOAT .

That is why most batteries die within 6 months of installation ( sulphation from improper charging).

I have been off grid since November 2018, and I discovered this is a basic setting most installers fail to achieve for their clients.

Re: Kindly Help With My Solar Energy Set Up. by matify83: 4:16pm On Apr 26, 2021
That is my 24V (2S2P) set up at 100% fully charged but still cycling because it is always in use 24/7

Notice that, though a 24V setup but the cycling voltage is 28.89V.

Re: Kindly Help With My Solar Energy Set Up. by AfroBeatDiary: 1:58pm On Apr 27, 2021
matify83:



At 13.3V charge voltage, you may never bring up your battery to a full charge. You will be murdering your battery ( Sulphating) in slow motion.

Check your battery charging specifics.

Most AGM batteries go as high as 60A cycling current and about 14.8 to 15V cycling voltage to get your battery to FLOAT .

That is why most batteries die within 6 months of installation ( sulphation from improper charging).

I have been off grid since November 2018, and I discovered this is a basic setting most installers fail to achieve for their clients.
What is the solution my brother?
Re: Kindly Help With My Solar Energy Set Up. by AfroBeatDiary: 2:00pm On Apr 27, 2021
matify83:
That is my 24V (2S2P) set up at 100% fully charged but still cycling because it is always in use 24/7

Notice that, though a 24V setup but the cycling voltage is 28.89V.

I have a 100ah batter I charged with the set up and it reaches 14.4 with the same charger controller, pls what's the solution!
Re: Kindly Help With My Solar Energy Set Up. by matify83: 8:33pm On Apr 28, 2021
AfroBeatDiary:

What is the solution my brother?

So sorry , just seeing your question.

Like I explained earlier, take a look at the write up on the body of your battery.

Give me the following parameters:

Cycle use
Stand by use
Initial current

With these, we can proffer solutions
Re: Kindly Help With My Solar Energy Set Up. by AfroBeatDiary: 11:54pm On Apr 28, 2021
matify83:


So sorry , just seeing your question.

Like I explained earlier, take a look at the write up on the body of your battery.

Give me the following parameters:

Cycle use
Stand by use
Initial current

With these, we can proffer solutions




Here is it sir

Cycle use 14.1 - 14.4 (27°)
Standby use: 13.6 - 13.8v (27°)

Re: Kindly Help With My Solar Energy Set Up. by matify83: 2:45pm On Apr 29, 2021
AfroBeatDiary:


Here is it sir

Cycle use 14.1 - 14.4 (27°)
Standby use: 13.6 - 13.8v (27°)

Beautiful !!

You can see that your battery would require max. 14.4V to charge it properly.

However, the catch here is that this only obtains at a battery temperature of 27 degrees centigrade.

Most mppt charge controllers have temperature sensors that regulate the cycling voltage to match any rise in temperature as you would expect in our hot environment.

Ohm's law: V = IR

A battery's internal resistance increases with rise in temperature, so invariably you will require a higher cycling voltage to charge your battery in our clime.

Your initial current s 30% of 200A = 60A.

So, your charge controller should be able to deliver up to 50A at a conservative 14.8V for your battery to get fully charged daily.

I suggest you get a 60A mppt solar charger and another 200W solar panel which you will also connect in parallel to the other 2.

3 solar panels will have a max. Short circuit current of about 32A.(total)

The voltage of the 3 panels in parallel connection remains the same ( max. Power voltage of ~30V)

So, Power = V x I = 30 x 32 = 960W


The beauty of an mppt charger is that it converts all voltages in excess of your 12 V to more current for a faster temperature compensated charging.

With this, your battery will always be fully charged even while you use it maximally during the day.

You can always upgrade your battery bank on this same charge controller up to150V panel voltage.

Hope I have not confused you

1 Like

Re: Kindly Help With My Solar Energy Set Up. by AfroBeatDiary: 10:30pm On Apr 29, 2021
matify83:


Beautiful !!

You can see that your battery would require max. 14.4V to charge it properly.

However, the catch here is that this only obtains at a battery temperature of 27 degrees centigrade.

Most mppt charge controllers have temperature sensors that regulate the cycling voltage to match any rise in temperature as you would expect in our hot environment.

Ohm's law: V = IR

A battery's internal resistance increases with rise in temperature, so invariably you will require a higher cycling voltage to charge your battery in our clime.

Your initial current s 30% of 200A = 60A.

So, your charge controller should be able to deliver up to 50A at a conservative 14.8V for your battery to get fully charged daily.

I suggest you get a 60A mppt solar charger and another 200W solar panel which you will also connect in parallel to the other 2.

3 solar panels will have a max. Short circuit current of about 32A.(total)

The voltage of the 3 panels in parallel connection remains the same ( max. Power voltage of ~30V)

So, Power = V x I = 30 x 32 = 960W


The beauty of an mppt charger is that it converts all voltages in excess of your 12 V to more current for a faster temperature compensated charging.

With this, your battery will always be fully charged even while you use it maximally during the day.

You can always upgrade your battery bank on this same charge controller up to150V panel voltage.

Hope I have not confused you

Thank you for this analysis, I'll do exactly as suggested. I'm very grateful.
Re: Kindly Help With My Solar Energy Set Up. by matify83: 12:23am On Apr 30, 2021
AfroBeatDiary:


Thank you for this analysis, I'll do exactly as suggested. I'm very grateful.

God be praised

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