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sameer · Nov 22, 2020

Hi all. How are you doing.
I from Syria
bought this device and I want to help with the installation method in terms of the number of solar panels and the number of batteries.
Note. The organizer or the device attached to some pictures. I don't want to run it at full capacity.
I just want to load from 2000 to 2500 watts and not 3500 watts which is the power of the device. Is it helpful to estimate the number of panels and the number of batteries that need to be installed in order to pull out of the device only 2000 or 2500 watts.

Thank you all

upnorthandpersonal · Nov 22, 2020

As long as you have a 24V lead-acid battery (preferably in the region of several kWh, depending on how long you want to run) and solar panels that are wired so that they output between 120V and 450V (and again, depending on your needs, at least a few kW) you should be good.

sameer · Nov 22, 2020

Thank you for your quick response, my friend. The question is how many solar panels and how many batteries I need And as I told you. I want to pull 2, 500 watts from the inverter
thank u

Deleted member 9967 · Nov 22, 2020

About 200 Ah of 12 volt batteries will give you 2400 watts. That would be per hour. So multiply by the number of hours you want it for.

As for solar panels though I have to guess from what I have read.
I have heard you divide by five hours of the day for productive sunlight.
So 2500 divided by 5 is 500 watts. So 500 watts of solar panels.
Then multiply that by the batteries you have.
As for their voltage, I am guessing only but 12 volts as you want 12 volts?

upnorthandpersonal · Nov 22, 2020

SherylinRM said:
As for their voltage, I am guessing only but 12 volts as you want 12 volts?

The inverter charger assumes 24V.

sameer said:
how many solar panels and how many batteries I need And as I told you. I want to pull 2, 500 watts from the inverter

That depends on how long you want to draw that power and how fast you need to have your batteries full again.

sameer · Nov 22, 2020

upnorthandpersonal said:
The inverter charger assumes 24V.

That depends on how long you want to draw that power and how fast you need to have your batteries full again.

sameer · Nov 22, 2020

Thank you for your response.
Yes, The Inverter is 24. Assuming I'm going to connect 8 solar panels, the voltage of each solar panel is 330 watts, the solar panels will have a voltage of 2,640 watts, and in return I'm going to connect two batteries 150 Amp on the series to get a 24-volt.
The battery voltage in watts is 150 ×24 = 3,600 watts. The question is whether the voltage that will result from the panels can charge the battery. Are the panels enough to charge the battery. Thank you

upnorthandpersonal · Nov 22, 2020

sameer said:
the voltage of each solar panel is 330 watts

They have a power of 330 Watt, not voltage. You need to know the voltage as well since you have to be within the limits of your controller (both the lower and higher limit: 120V to 250V. This depends entirely on what panels and how you put them (series/parallel).

sameer said:
I'm going to connect two batteries 150 Amp on the series to get a 24-volt.

Nitpick maybe, but units matter: these are amp-hours (Ah), not Amp. An Amp(ere) is the unit of electrical current, while an Amp-hour is a (in my opinion bad) unit for energy stored in a battery at said batteries specific voltage. Multiply with the voltage and you have energy independent of said voltage, the Watt-hour, Wh.

sameer · Nov 22, 2020

upnorthandpersonal said:
They have a power of 330 Watt, not voltage. You need to know the voltage as well since you have to be within the limits of your controller (both the lower and higher limit: 120V to 250V. This depends entirely on what panels and how you put them (series/parallel).

Nitpick maybe, but units matter: these are amp-hours (Ah), not Amp. An Amp(ere) is the unit of electrical current, while an Amp-hour is a (in my opinion bad) unit for energy stored in a battery at said batteries specific voltage. Multiply with the voltage and you have energy independent of said voltage, the Watt-hour, Wh.

Thank you.. I'm talking about the power of the board, not the voltage, and I know that the total voltage of the vdc panels should be between 120-450 vdc. Thank you, my friend. Greetings to you

Hedges · Nov 22, 2020

sameer said:
Thank you.. I'm talking about the power of the board, not the voltage, and I know that the total voltage of the vdc panels should be between 120-450 vdc. Thank you, my friend. Greetings to you

It is Vmp that should be between 120 and 450 V

But most important, Voc (open circuit) of the panels must never exceed 500V. The panels will have a spec for Voc, but it must be adjusted for record coldest temperature that has ever occurred at your location. This may boost voltage 16%, more or less in your case.

So based on that analysis, maybe all PV panels are connected in series. Or, if that is too high a voltage, maybe they care connected in in series and parallel for a lower voltage and higher current.

Do you want to operate the 2500W load during daylight? or at night?
This makes a big difference in how much battery storage is required.

For instance, you could run an air conditioner all day long without much battery.
But running lights at night, all the power comes from battery.

What do you want to operate? Some loads, like induction motors in air conditioners, require 5 times as much power to start as when running.
The inverter label shows surge power 7000VA, so it might be able to start a 1400W motor.

sameer · Nov 23, 2020

Well done, my friend. Voc should calculate this value on the probability of the last temperature exposed to the board below zero. I mean, the temperature is below zero. Assuming that the temperature will drop to 10 degrees below zero, in this case the ratio will be 1.14. voc×1.14 for the loads I want to generate or need to use. she.. The lights, the TV, the fridge, and that's only in the daytime, and I think I can save these loads of panels during the day time, not the battery. But at night I need some light lights and refrigerator and take it from the battery

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