Connecting 5W Polycrystalline & 10W Monocrystalline PV Panels with Charging Regulator

Recently, I got a small 5W photovoltaic panel. I delved into the topic of Renewable energy and I wanted to buy another panel, but to make it cheaper, I found a MONOCRYSTALLINE panel together with the charging regulator, and I have a POLYCRYSTALLINE panel. If I connect them together, will something happen? Polycrystalline - 5W Monocrystalline 10W.

Hello. You did not provide the drink from the rating plate.

I do not know much about it yet, so I will write down everything that is written:
Model type CL005-12
Rated power 5W
Rated current 0.30A
Rated voltage 16.5V
Short circuit current 0.34A
Open circuit voltage 21.0V
It was polycrystalline

Model MH10
Monocrystalline type
10W power
Charging current [Im] 0.58 A
Short-circuit current [Isc] 0.72 A Nominal voltage [Um] 17.5 V
Idle voltage [Uoc] 21.6 V

You can connect from poverty

Is it about similar output voltages?

Yes, it is about similar output voltages. With such a low power, nothing will happen. Just connect them in parallel with each other.

You can connect similar DC voltages by connecting diodes in series at each panel, in theory it will be different in practice.

Let me connect to the topic.
I have a similar dilemma, but currently I have two polycrystalline panels connected in parallel and I would also like to connect two or three more monocrystalline panels in parallel to the polycrystalline ones (the entire system of panels will be used to power the water heater, which will be part of the underfloor heating, the heater is for 24 but I understand that if I provide a little more voltage, its power will just increase)

Parameters of polycrystalline panels:
Pmax = 120W
Voc = 31.9V
Isc = 5.31A
Vpmax = 25.7V
Ipmax = 4.67A

Parameters of monocrystalline panels:
Pmax = 180W
Voc = 44.4V
Isc = 5.35A
Vpmax = 35.4V
Ipmax = 5.08A

All panels would be connected in parallel to the heater (heating would only be on cold days, other panels would be used differently)
Will such a combination of panels not spoil each other ??
Please help.
Thank you in advance

Here you have too large a difference in the voltages of the panels - 10V.
It's too much to hold them together for a short time.

How could you connect them ... ?? I read somewhere about diodes, but I do not know if it will work in this case ...
I would like to ask for advice on how these panels can be combined into one source.

You will lose some power, but you can connect a diode in series to each panel.

well, I can, but then I will not be able to power the heaters directly, and most of all I care about it.

The load will be greater on the 180W panel.
Connect to the heater without a regulator.

Added after 2 [minutes]:

And what kind of heater do you have, how many W.

I have a heater for 24V (200W), so far I have bought it for testing for PLN 10.
So connect the panels as in the diagram, only instead of the regulator there will be a heater ... ??
and these diodes are TO-220AC ??
such a connection will not damage any of the panels ??
oh, these panels combine poly with mono ??

You will not damage the panels,

Added after 5 [minutes]:

No matter what fast diodes you don't have yet, you can use rectifiers.

Added after 37 [seconds]:

10A minimum.

So summing up this:
1.Panel 120W and 180W connect in parallel via LEDs on "+"
2. A heater can be connected directly instead of the regulator

Only such a question, will the voltage at the output be averaged with such a connection of the panels?
what am I meant by

prose wrote:

You'll lose some power

?

The panel with higher voltage will be more unloaded to the voltage of 25.7V of the 120W panel. The panel will not hurt, you will lose a little on the maximum power.

Added after 1 [minutes]:

I used to have panels connected this way.

Better solution: 70 V heater and panels in series.

only that I have two 120W panels and I want to buy 3 more 180W panels.

My friend photovoltaic modules are sources of current more than voltage.

Therefore, the worst mismatch is the large difference in currents, while the difference in voltages is not. It should be remembered that the maximum current flow in the string will be allowed by the weakest element.

Hi,
I will also stick to this topic because I have 1kW Q.cells with a voltage of 65V and I would like to buy 1kW Poly 30V and connect two in series, which will give 60V? did someone connect something like that, tried if it made sense. The panels will be connected to the e-tracer 60A MPPT charge regulator. I wonder if it will work well or there will be losses because if something is going to be wrong or power drops, I will not combine.

Better to buy a second regulator and connect it parallel to the battery.

the second regulator falls off because of course it will overpay ...

Hello,
I will also stick to the topic .
I have a 150W panel with the following parameters:
Number of solar cells: 36 (SS50-M)
Module efficiency: 13%
Optimum power voltage Vmpp: 18.0V
Maximum power current Impp: 2.81A
Open circuit voltage Voc: 21.5V
Isc short circuit current: 5.08A

connected to the WP35 30A 12 / 24V LCD charging regulator and 84ah battery.
Directly to the battery I have a FW03-12 wind controller (300W 12V) and a S-300 wind turbine (300W 12V), the whole system is powered by two dahua cameras and an LTE router with a total power of 32.04 (2.67A) - and so on truth does not expel and provides little energy.
I would like to add an additional 160W module to the installation, which I already have, I realized that I should connect the panels in parallel and secure them with diodes ...

Etoo71 wrote:

Hello,
I will also stick to the topic .
I have a 150W panel with the following parameters:
Number of solar cells: 36 (SS50-M)
Module efficiency: 13%
Optimum power voltage Vmpp: 18.0V
Maximum power current Impp: 2.81A
Open circuit voltage Voc: 21.5V
Isc short circuit current: 5.08A


(...) I would like to add an additional 160W module to the installation, which I already have, I realized that I should connect the panels in parallel and secure them with diodes ...

e.g. 50V 10A from the positive wires of the panels to the regulator, only compare the voltages of the panels

The first photo with the parameters of the new 160W panel, the second is the specification of the already installed 150W panel.


How do you see it?

The voltage is ok. And if the diodes are not with heat sinks, then you need a higher current, so 15-30A.

These parameters from the second photo do not match each other, the current will be about 8.5A and not 2.81 as in the specification

theo33 wrote:

These parameters from the second photo do not match each other, the current will be about 8.5A and not 2.81 as in the specification

Earlier, I did not pay attention to it, maybe it is just a specification error on the website, I will send a photo of the plate on the panel right away. In any case, I have two identical 160W panels in emergency. As for the diodes, I think that with the help of the electric one, it will match something, but in fact I have hopes that it is just a problem with the charge regulator.

Hello
If it is also possible, please help me if it makes sense to connect both panels in parallel and does it even make sense to connect these two panels together.
Is it better for this 280W panel which is connected to 3 64Ah batteries and, unfortunately, it does not work, it would be possible to connect, for example, a 300W turbine

1, panel
P max - 280W
Isc - 9.41
Voc 38.97
Vmp - 31.67

2nd panel
P max 100W
Isc - 5.92
Voc - 22.5
Vmp - 18.3

I am asking for help and thank you in advance that nobody is shouting at me

In my case, it turned out that the panel was damaged and did not charge, I replaced it with 160W. And in my humble opinion, it is better to add a panel if it is possible
Certainly, it is a cheaper solution and probably more reliable, turbines achieve their nominal power only in strong winds, unless you want to invest in a vertical turbine that starts and gives electricity at lower winds, but their amounts are probably 2x higher than that of an ordinary "windmill".