Solar panel suggestion

[flash99]

Hi,

1. I have a limit of 150 voc on my device and want panels that can supply at least 1600w. Are there any decent panels I could get?
2. What angle should the panels be at from a flat room?
3. What is the best company to source the complete brackets for the panels?

Thanks

 

[leon.davibe]

Diy or installer?

Stay well clear of max voc

Rule Of thumb with decent safety margin only use 80% of voc if you want to do three panels in series you need 60/120(half cut) cell panels with 42v ish volt 550w



They are heavy and difficult to handle up to the roof though



If doing 72/144 50v ish

you can only do 2 in series

Cold temps spike the voc ie
Ie cloudy days cold panel sun pops out the voltage goes higher than the sticker voc hence the 80% for buffer if you do the math with your record low temps in your area you can go closer



You have to see what panels you get that fits the voltage/output that gets you to your target

 

[flash99]

Thanks for the advice. The panel choice is where I am getting stuck, I haven't seen anything close

 

[B-1]

Hi,

1. I have a limit of 150 voc on my device and want panels that can supply at least 1600w. Are there any decent panels I could get?
2. What angle should the panels be at from a flat room?
3. What is the best company to source the complete brackets for the panels?

Thanks

I'm assuming its an MPPT charge controller. PWM needs more info.


1. You can do 4x400w panels. You will need to wire 2 strings of 2 each and then parallel them together. The Canadian solar HiKu ones will give you 77.4v nominal and 85.4v open circuit voltage in that configuration.(you don't say what the best efficiency voltage is for the charge controller) this will be at 20.68amps so make sure the mppt can take that current.
2. That depends on where you are in the country. There are free tools that can tell you that though.
3. Dunno

 

[leon.davibe]

This will give you default best angle for your area

Global Solar Atlas

The Global Solar Atlas provides a summary of solar power potential and solar resources globally. It is provided by the World Bank Group as a free service to governments, developers and the general public, and allows users to quickly obtain data and carry out a simple electricity output...

globalsolaratlas.info

 

[leon.davibe]

The 20amps is on panels side , based on that panel selection

voltage selection
If for instance you go for 120v the amps would be 13.33a on panel side


The charge controllers tend to be specified in battery charging amps so your calculations needs to be with your respective voltage

As an mppt converts that power to your voltage and the amps thus changes


Hence if you have a 12.8v system you would need 125a charge controller to use all 1600w /12.8v =125A
You can also use multiple controllers ie surw you will sttuggle ti find 125a cintroller ie you can use 2x 60a controllers and have half the panels on each

1600/25.8v ,=62a (60)

51.2v system you would need a 31.25A(30)

That is if you want to be able to effectively use all 1600w for battery charging keep in mind you can only use this amount of charging amps if you have lithiumn

With lead acid the charge rate will be too quick and damage the batteries

If you have a massive bank with parralel batteries the amps can go up again

ie if 100ah 20a charging

200ah (2x100ah parallel) 40a

 

[leon.davibe]

If it is pwm controller you need to look for panels in these ranges

12v syatem look for 18v panels google 30 cell panels

For 24v look for 30-32 v 60cell panels

For 48 volt choose a panel to have series string with probably 60v

And keep most panels parralel to stick with that voltages otherwise the losses are to much

 

[leon.davibe]

And keep in mind you can't charge at these rates on lead acid unless you have parralel banks/batteries

ie 100ah charge at 20a


2x100ah parralel 40Ah
12v =2 batteries
24v = 4 batteries

 

[leon.davibe]

if wanting to use a calculator to get the temp adjusted voc vmp
this calculator is useful the charger portion where it grades the array based on their 3 charge controllers can be ignored

this is all about the voc

will need to get all the info from the spec sheet of chosen panel

And record low temp of your area as that is what affects the voc, ie you plan on extremes so you don't lose something on perfect storm weather events

PV String Calculator | AERL

Calculate the compatibility of your PV panels with AERL solar charge controllers. This tool helps you design optimal solar arrays for CoolMax SRX and SRX-R charge controllers.

www.aerl.com.au

 

[flash99]

Thank you all for your replies. I just need to digest this all before moving forward

 

[SHL]

Need some advice on solar panels. Type, quantity, brand, price etc

My current setup is:
GROWCOL MKS IV Off-Grid Inverter with 2 x Pylontech UP5000 Batteries

SPECIFICATION	MKS IV 5600-48 (Single Phase)
RATED POWER	5600VA/5600W
PARRALLEL CAPACITY	up to 9
VOLTAGE	230 VAC
SELECTABLE VOLTAGE RANGE	170-280VAC (for PC’s); 90-280VAC (for Home Appliances)
FREQUENCY RANGE	50Hz/60Hz (Auto sensing)
MAX. OUTPUT CURRENT	230 VAC
AC VOLTAGE REGULATION (BATT. MODE)	11200VA
EFFIECIENCY PEAK	93%
RATED GRID VOLTAGE	10ms (for PC’s) 20ms (for Home Appliances)
WAVEFORM	Pure Sine Wave
BATTERY VOLTAGE	48 VDC
FLOATING CHARGE VOLTAGE	54 VDC
OVERCHARGE PROTECTION	66 VDC
SOLAR CHARGER TYPE	MPPT
MAXIMUM PV ARRAY OPEN CIRCUIT VOLTAGE	450 VDC
MAXIMUM PV ARRAY POWER	6000W
MPP RANGE @ OPERATING VOLTAGE	120 ~ 430 VDC
MAXIMUM SOLAR CHARGE CURRENT	120A
MAXIMUM AC CHARGE CURRENT	120A
MAXIMUM CHARGE CURRENT	120A

- Which brand/type of panels should I go for and what should I be paying at current market price?
- Considering the inverter max pv array power is 6000W, how many panels should I be looking at to take maximum advantage of solar energy during the day?