BetaTechnicians:

Real Nice Design, would save your template .

Which meters are those two?
How/do you isolate the PV without glitch under load/during sunlight? as you stated near the changeover.

olaolu11:


Meaning the changeover must come before the CCs(panels to changeover and then separated to the two CCs)?
Hmnn. I thought i can just separate them and thus break the juice from panel via the CCs and spread on the batteries thus charge simultaneously. All im trying to achieve is charge both batteries. Old battery is weak and lasts 1.5 hrs after sundown. So im thinking i van use it with load during sunhours while new battery is unused and charging. Then at sundown after old battery shuts down, i can switch to charged new battery. Thats my target. But if i cant charge both simultaneously, then the proposal cant work.

Do you have a suggestion on how i can achieve the target?

olaolu11:



Thanks for the pics. I will post drawing of my proposal presently. Thanks

lexi28:


the text on the sticker mentioned a PV breaker somewhere. he switches off the breaker, before changing battery selector I believe..

ojeysky:


Oh really? Na wa o..... Let me disable scheduled equalization chap chap! Thanks o.
That said, I like to know why equalization is not good for AGMs can you educate me chairman?

earthrealm:


this should be a good place to start, though few peeps claim it is good, they r in the minority.

https://www.google.com/search?q=should+i+equalize+agm+battery&rlz=1C1CHBF_enNG770NG770&oq=should+i+equalize+agm+battery&aqs=chrome..69i57j0.11924j0j7&sourceid=chrome&ie=UTF-8

eleojo23:
Please can someone recommend good external chargers for deep cycle batteries?

ojeysky:


Yes and that was exactly what I did yesterday and what I found is that it's okay to do equalization so long as it's done periodically. It was why I asked your opinion on AGM (VRLA) batteries just to hear your practical experience

Holumiedey:

Try victron chargers. What's your battey bank capacity.

ojeysky:


Yes and that was exactly what I did yesterday and what I found is that it's okay to do equalization so long as it's done periodically. It was why I asked your opinion on AGM (VRLA) batteries just to hear your practical experience

NiyiOmoIyunade:
Thank you very much!

olopan:
Nice setup ...... looks yummy!

BetaTechnicians:

Yes I understand, but switching of PV under load? I have seen breaker go up in flames in such scenario which is why I'm asking if there's a fail-safe method for such.

BetaTechnicians:

Yes I understand, but switching of PV under load? I have seen breaker go up in flames in such scenario which is why I'm asking if there's a fail-safe method for such.

harizonal123:

Guy u too organise die. This is one of the neatest connections I have seen. The whole arrangement just look sweet & this is exactly what I intend doing.It is more like a power grid control station. Thumbs up

lexi28:


hi, love your wiring and setup. those adhesive stickers, how did you get them? any hints?
thanks

BetaTechnicians:

Real Nice Design, would save your template .

Which meters are those two?
How/do you isolate the PV without glitch under load/during sunlight? as you stated near the changeover.

BetaTechnicians:

Yes I understand, but switching of PV under load? I have seen breaker go up in flames in such scenario which is why I'm asking if there's a fail-safe method for such.

dragnet:

are AGM same as VRLA ?

mcTrinity:


Hi BT,

now I understand your point. you're right but however, the breaker wouldn't go up in flames if you use the right type (DC) and the right size, just like Lexi has rightly stated.

nonetheless, in that particular installation, its only the positive leg of the PV array that goes through the 2-pole breaker (yes, its a 2-pole breaker). hence making the breaker over-sized. and I intentionally did it like that because I want the breaker to function mainly as an Isolation breaker.
NB: the breaker is rated 100A DC

cheers

earthrealm:


well my 63amp dc breaker burnt too, when i flipped it on and off a few times, while under load of about 800w to 1100w on a 48v system 3s2p 250w mono panels

Dishtech:

1. Yes it can be connected in both parallel and series
2. The inverter is built by me without changer, I only charge it with sun using the pwm cc, by setting the upper voltage at 14.6v (or 29.2v for 24v system).
3. My charge controller is for 12v or 24v auto voltage recognition, every is written on the charge controller, I will sketch and send you later.
4. For your battery I will advise you use the same type and age ( new together or old together) because LiFePo4 battery voltage sensitive and can explode if charge voltage is exceeded. If your system is 12v, then parallel the 3 new ones and sell the older one but if 24v system Buy another one to add to the three to connect 2s2p. Or better still charge the 4 battery fully charged at 14.6v (check your battery labels for max. Charge voltage) then leave them for 24hrs then read the various battery voltage using digital meter. If the there remains the same then you can use them together.

Dishtech:
For I have small package like that, 2 used 40ah LiFePo4 battery (10k each), 250watt solar panel (33k) 40A pwn charge controller ordered from China (6.5k) and a homemade inverter made by my self (7k), cable (3k) TOTAL #69,500. This power my 32" Led TV, home theater, decoder, my standing fan, charge my phones, and 4 Led bulbs. Am usually home from 7pm which my appliances comes on then, till 11:30pm or 12am bed time TV is off leaving light and fan till 3 or 4am when weather is cold fan is off leaving light till day break. If am home I equally use the system when battery is charged from noon and the system is running smoothly for 6 months going. Below are my setup!

microgiant:


Thanks for your prompt response.

Please note that the batteries are designed for laptop. It comes with an adapter for charging with a different connection, another positive and negative cable out with adapter connection laptop power socket and adapter with printer socket.

I don't know if it is the same type as yours.

mcTrinity:


Hi Lexi,

thanks for the compliment.

the sticker is not a rocket science... I simply prepare the writings with my laptop. then I print them and cut them neatly with scissors. #see pic

then I use transparent tape on the front and trim off the excess tape, then I apply the UHU Adhesive glue on the other side before placing it on the desired spot. the tape is to protect the tags

for the bigger ones, I laminate them, trim them before using the adhesive to glue them.

Cheers

Horlaarsco:
Hello guys please my final year project is setting up a solar system for a modern office.. Please anyone who can put me through on doing this i plan to get the components on monday

1. 1kva inverter
2. 250 or 300 waats solar panel
3. PWM Charge Controller
4. 100Amps battery

is there anything else to get and how do i set it up and are they all compatible with each other i dont mind a contact of someone i can buy from ..

Horlaarsco:
Hello guys please my final year project is setting up a solar system for a modern office.. Please anyone who can put me through on doing this i plan to get the components on monday

1. 1kva inverter
2. 250 or 300 waats solar panel
3. PWM Charge Controller
4. 100Amps battery

is there anything else to get and how do i set it up and are they all compatible with each other i dont mind a contact of someone i can buy from ..

Easylearner:
Good day everyone
Wanna ask some few questions...

How can I utilize this component correctly on a solar system

1. Mcb>> circuit breaker (do i need a circuit breaker when installing and if yes! How do i calculate for the correct rating and the right position to place it)

2. Spd>> Surge protector device ( How can i surge my device, the right way to do it and what determines the rating)

3. Fuse>> when a mcb is already integrated in a system can fuse still be used or the mcb act as a fuse...

4. Is it compulsory to use a battery balancer

5. When connecting a battery in parallel, what's the appropriate number that is idea to connect (i heard 3 column)

I'm asking before i burn my house or spoil the devices.

microgiant:


Thanks for your prompt response.

Please note that the batteries are designed for laptop. It comes with an adapter for charging with a different connection, another positive and negative cable out with adapter connection laptop power socket and adapter with printer socket.

I don't know if it is the same type as yours.

Dishtech:

Yes it has separate pairs cables one for charging and the other for supply. It has internal BMS, Connect your Charging Port to to your CC and set the required voltage for charging.