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stuffs2002:
Good morning gurus,


Please which of this connection is better.

Connection 1
six solar panels connected in series/parallel to an MMPT charge controller in the manner as shown in the diagram

Connection 2
Six solar panels all connected in parallel to a PWM charge controller as shown in the second diagram

Connection 1 is best.

Pwm is best for arrays below 900w.
If not you would need very thick cables to run from panel to Cc....

Valto:
18W 56" DC/AC ceiling fan with remote control and 5meter connection cable @ 30k. other brands available @28k

Hello Valto, are the DC/AC fans still available??

NiyiOmoIyunade:
Lightning can strike in the absence of rain and even during the day too.

One would need a direct line to the gods to predict when lightning could strike and also be present to effect a safe system disconnect in advance.

A working solar system should have at least the minimum protection - at least 2pcs of 6 foot earth rods sunk in the ground 18 feet apart and bonded together and the solar panel frame/rack and charge controller earth point solidly connected to the rods.

At worst the panels/rack frame should connect straight to the rods while there is another cable service from the rods into the house terminated at a busbar or similar arrangement to earth the CCs to.

The solar professor, I hail oh. Thank goodness say person no carry dictionary to grab this!

NiyiOmoIyunade:
Do you have a BMS attached to your battery pack? What is the HVD on your BMS?

When the charger gets the battery pack to 14.6v what is the highest voltage on any 1 cell in the pack?

Are your cells 3.2v nominal?

The answers to these questions will help put your statements in proper perspective.

1: yes, there is a BMS bundled with the battery internally...
2: the HVD is 14.6v as I have always monitor that with a volt meter even though the charger has an indicator that turn to green from red when the battery reaches 14.6
3: I have not measured the cells before as they are all welded together in the pack (bunch of cylindrical lifepo4 batteries)

Hello Engineers in the house,

Please i need data on how to set up a solar panel system for my small appliances:-
- One TV set
- One Gotv decoder
- 20 watts (4 Nos.) Lights
- 100 watts (3 Nos.) Lights
- One socket for charging phone.
A drawing will be appreciated plus best prices for required items.

AnikeTTC:
Hello Engineers in the house,

Please i need data on how to set up a solar panel system for my small appliances:-
- One TV set
- One Gotv decoder
- 20 watts (4 Nos.) Lights
- 100 watts (3 Nos.) Lights
- One socket for charging phone.
A drawing will be appreciated plus best prices for required items.

Everything you need has been posted multiple times if you read through the thread a couple of pages back

HajjiRuffy:


Still trying to figure how to get this charge controller. Pls share a link of where to get it

https://www.amazon.in/ASHAPOWER-Solar-Charge-Controller-Ver-6/dp/B08P5VJGFK/ref=mp_s_a_1_2?crid=28XW8DX08LUCN&keywords=Ashapower+80amp&qid=1677925660&sprefix=ashapower+80amp%2Caps%2C492&sr=8-2

I have 2 scrapped tubular for sale, interested dm 08098808419

NiyiOmoIyunade:
Be wary of high float voltages for LFP....

bros, I quoted you earlier. I don't know if you can chime in please...thanks in adv

stuffs2002:
Good morning gurus,


Please which of this connection is better.

Connection 1
six solar panels connected in series/parallel to an MMPT charge controller in the manner as shown in the diagram

Connection 2
Six solar panels all connected in parallel to a PWM charge controller as shown in the second diagram

both can be done so far you obey the rules for optimal harvest from them...I think the MPPT would be more realistic though.

solareclips:
I have 2 scrapped tubular for sale, interested dm 08098808419

where is kiekie, see food o

Jefferyzz:
I don't understand d first question. Is it that u wantu place a stab between nepa n ur hybrid inverter AC input or u wantu place a stab between ur inverter AC output n ur household load

D second question question is dependant on the max pv input of ur hybrid inverter. But if ur inverter has max voc of 150v. U can do 3s2p.

Good day bro, please my inverter has a max voc of 100v and it's a 3kva hybrid inverter, how can I get an effectiveness on it using (3) 450 watts panel on a 12V 200a(2) tubular batteries

Thank you

Smartwoods:


Good day bro, please my inverter has a max voc of 100v and it's a 3kva hybrid inverter, how can I get an effectiveness on it using (3) 450 watts panel on a 12V 200a(2) tubular batteries

Thank you

Hello bro...

To help you get prompt and effective advise from experienced folks here, consider mentioning the brand of the Hybrid inverter (and the CC technology [MPPT or PWM]), batteries and panels (I recognize that it may be diffucult to get a picture of the nameplate showing the specs since they are already mounted). Better still, send current pics of the harvest as shown on the inverter screen

Also state the connection configuration of the panels and confirm whether the batteries are connected in a 12v (parallel) or 24v (series) connection

AnikeTTC:
Hello Engineers in the house,

Please i need data on how to set up a solar panel system for my small appliances:-
- One TV set
- One Gotv decoder
- 20 watts (4 Nos.) Lights
- 100 watts (3 Nos.) Lights
- One socket for charging phone.
A drawing will be appreciated plus best prices for required items.

600 watts give or take.

Put them in parallel. U can use branch connector for that instead of cutting ur mc4 connector. If ur hybrid cc is pwm. It will b better if u can get mppt cause there will b some wasted energy on pwm

Smartwoods:


Good day bro, please my inverter has a max voc of 100v and it's a 3kva hybrid inverter, how can I get an effectiveness on it using (3) 450 watts panel on a 12V 200a(2) tubular batteries

Thank you

odimbannamdi:


Hello bro...

To help you get prompt and effective advise from experienced folks here, consider mentioning the brand of the Hybrid inverter (and the CC technology [MPPT or PWM]), batteries and panels (I recognize that it may be diffucult to get a picture of the nameplate showing the specs since they are already mounted). Better still, send current pics of the harvest as shown on the inverter screen

Also state the connection configuration of the panels and confirm whether the batteries are connected in a 12v (parallel) or 24v (series) connection

Thank you

The Inverter is a 3kva 24V Srne Hybrid Inverter with VOC of 100V

The panels are 450 Watts by 3 panels and they are already mounted

The batteries are (2) 12V 200a batteries and I'm not am expert so I wouldn't know if they were connected in series or parallel but I believe it should be in series since the inverter is a 24V inverter system

The MPPT is a 30-85Vdc with a Max input current of 40A

MontyNG:
Wow! Thanks a lot Niyi.

No it's not an all victron setup. I'm using a deye/sunsynk 5kw inverter and batteries that only have Bluetooth comms. This limits me in terms of an ideal inverter config since there's no accurate soc value for the inverter to use, and using just voltages is not ideal

So I'll have the wifi module connected in the rs232 port on the inverter.. That will allow me to use the inverter's own wifi app but these are usually limited.

On the rs485 port, I want to connect a pi running solar assistant.

I'll now have a free CAN port and another rs485 port (meant for battery comms)
So wouldn't be able to implement this solution with another pi as a gx device unless I sacrifice solar assistant.

Hi. I am installing a Deye with a 200AH/48v battery with only bluetooth comm. Can you help with the battery settings on the Deye? Thanks.

NiyiOmoIyunade:
Things are now far easier boss.

If you put the Victron Venus OS large image on a Raspberry Pi (be sure to use a 3B and not a Pi4) - you can natively connect your Victron smart shunt via VeDirect to USB, also your BMS can natively use the Venus OS driver for serial batteries so that SoC and cell level info are plug and play available on the Pi - works if your BMS is Daly or JBD or Jk and a host of others.

So already you have shunt and BMS data available on the VeBus network and available to use for info and control.

The Venus OS large image has NodeRed and you can create flows to pass BMS SoC data from the USB port of the Pi to the RS485 or CAN port of your Deye - if you are using CAN for control (charging etc) then you must have some control parameters setup.

For free Victron already provided you all the tools you need to attack most automation projects both on Victron and non Victron equipment

Hi. I appreciate the knowledge and insight you give on this thread. Can you be of assistance in getting the components and setting them up at a cost? I have a Deye 8kw with a 200ah/48v battery with bluetooth bms. Would love to have the inverter communicate directly with the battery. Thanks.

CC OjeySky. He is a strong and highly anointed Deye apostle and fanboy!

Technical note - for comms between these inverters and battery people typically emulate the Pylontech protocol on CAN - this is not always desirable esp as Pylons are 15S and setting up comms on this basis may lockout certain other critical battery parameters. It may be more prudent to pass only battery SoC to the inverter to drive LVD and stats but set your own charge voltage parameters custom as you would have done for any other battery.

EdmundDantes:


Hi. I appreciate the knowledge and insight you give on this thread. Can you be of assistance in getting the components and setting them up at a cost? I have a Deye 8kw with a 200ah/48v battery with bluetooth bms. Would love to have the inverter communicate directly with the battery. Thanks.

I have been hoping you would highlight these differences between lightning protection for ground mount vs roof mount so everyone could learn and share ideas.

FEGEITOK:
It would seem that lightening protection systems are differently engineered if the panels stay on the roof versus if the panels are on a stand directly connected to the ground.

Just wanted to highlight this point.

My Oga TrippleDots! I hail una o

1. I guess the Fronius is on the AC input side of the Victron Multi/Quattro? Please confirm

What PV related assistants are you running on the Multi/Quattro to manage energy flow.

Are you using the default frequency shift thresholds or more aggressive/conservative ones.

2. If the actual loads are within 10kw per phase where you have 15kva inverters you should look to your wiring on the load side - the most frequent cause of the generic 'overload' light flashing is actually faulty wiring.

You are looking for all neutral wires for the inverter loads properly moved to an isolated inverter load bus/DB and all neutral wires for non inverter loads moved to the mains DB. Any crisscross of neutrals between mains and inverter side causes these kinds of issues.

If you are pressed for time or want the easy way out, move the inverter supply to AC out 2 and set a suitable assistant to run ACOut2 off battery and prevent overloads.

See sample assistant setup below - the red circled (de)activates AC Out from battery based on battery voltage - you could also use SoC or other parameter

The blue circled abi na rectangled protects the inverter from an overload situation e.g in the case below for my house disconnect AC out 2 if loads higher than 9,500 watts for 60 seconds and reconnect or activate AC out 2 if loads under 9,500watts for 200 seconds.

Two things are important here -
1. The assistant logic is inverse so that START means STOP since the control is OPEN RELAY TO START.....

2. The backoff time for the AC contactor is tres importante - Victron backend dev strongly discourages the relay cycling rapidly ON/OFF several times a minute - it would stick shut and need visit to service center hence I give a mandatory 3 minutes (200 seconds) rest and cool off period if ever the inverter overloads and a 60 seconds of sustained high load before the inverter trips the AC out to allow large transients to pass with no trouble.

Trippledots:
NiyiOmoIyunade boss greetings. I have two Victron observations I will like you to advice on:

1. I notice Fronius shows that it's back feeding into grid on VRM when the PV harvest parameters favour such, even though back feed into grid is turned off in settings. Have you observed such before? Is this normal?

2. I have some 15kva Quattros and even 10kva ( but more of the 15) that fly into overload sometimes when grid is supplied or interrupted. Any ideas what the cause could be? All are 3-phase systems and not running on ESS.

Thanks.

For that second question, I have made the assumption that all issues like phase rotation e.t.c were already sorted since you said things mostly work.

To quickly find a 'common/crossed neutrals' issue I usually employ a test lamp. With mains available, switch off the inverter AC input breaker so that all supply to inverter loads is coming from battery.

With inverter AC input breaker switched off, apply test lamp between inverter AC out live and mains neutral. If the test lamp lights up then you have an inverter load whose neutral is still on the mains DB. Drop wires off the mains neutral bus until you isolate the offending neutral and relocate it to inverter side - there may be more than one neutral wire causing this problem.

Now repeat the test in reverse - disconnect AC input to inverter and apply test lamp between mains live and inverter neutral bus - if the test lamp lights up, there are mains loads whose neutrals are on the inverter side. For this case decide where the loads really should be and handle appropriately.

This test needs an incandescent bulb, a clear schedule for the day and plenty of patience to do in a complex miswiring situation. If you can get the electrician who (mis)wired the building to attend that would be very good too - they usually know all the shortcuts they took and (mis)wiring they did to cause all these problems, just be nice and kind to them during the process and things should typically work out well.

NiyiOmoIyunade:
My Oga TrippleDots! I hail una o

1. I guess the Fronius is on the AC input side of the Victron Multi/Quattro? Please confirm

What PV related assistants are you running on the Multi/Quattro to manage energy flow.

Are you using the default frequency shift thresholds or more aggressive/conservative ones.

2. If the actual loads are within 10kw per phase where you have 15kva inverters you should look to your wiring on the load side - the most frequent cause of the generic 'overload' light flashing is actually faulty wiring.

You are looking for all neutral wires for the inverter loads properly moved to an isolated inverter load bus/DB and all neutral wires for non inverter loads moved to the mains DB. Any crisscross of neutrals between mains and inverter side causes these kinds of issues.

If you are pressed for time or want the easy way out, move the inverter supply to AC out 2 and set a suitable assistant to run ACOut2 off battery and prevent overloads.....

NiyiOmoIyunade:
I have been hoping you would highlight these differences between lightning protection for ground mount vs roof mount so everyone could learn and share ideas.

I have to digest the videos and the literature.

It is a fairly technical subject.

Once I do, I will share.

I just have to find the time, and I will before the rains.

Can someone enlighten me please.

- What are the advantages of factory assembled lithium batteries over the locally assembled lithium batteries of same capacity and vice versa?

- Which is more durable and efficient?

- For a 5kva system, what capacity of lithium battery will be required? Also for a 3.5kva system.

Thank you.

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Trippledots:


where is kiekie, see food o

Haha Tripple. Been pretty engaged offline lately. Regards

oloet:


The charger doesn't have an adjustable voltage function, I have been using it like that for 4-5 years now though the lifepo4 are cylindrical in nature

Can you please share a picture of the cells and what's their Ah rating?

Juror:

Can you please share a picture of the cells and what's their Ah rating?

Let me use our local parlance, it is inec blue battery, two of it connected in parallel, it is rated at 480wh, I don't have the picture right now

Malquisoft:

The Old model is better.

how is the old model better boss, need your advise.