[Solved] Solar Installation Profitability: C21 Tariff, 250k-300k kWh Consumption, Two Shift Production

Hello.
I have a query for people using solar farms. Is it cost effective to install a photovoltaic installation in a company with a C21 tariff, monthly electricity consumption of 250,000 - 300,000 kWh? Two shift production.
Regards.

In the micro-installation system, those that have up to 40 kW of power are caught - such use the so-called rebates that are quite a good solution. Each 1 kWp of such an installation will produce 1000 kWh of electricity a year. Thus, the largest available micro-installation will produce 40,000 kWh annually - as much as the company uses during the week. As you can see, the profitability is negligible.

Larger installations already operate as professional power generators, and here the matter is very complicated - you need a person with a doctorate to calculate the profitability of the entire project. One thing is certain - large installations (those over 40 kW) without subsidies in the form of green certificates etc. are not very profitable.

It depends on the way (to) financing the investment, what fixed costs, e.g. for the lease of land for installation, etc. 500kW of average power consumption is very much and you need to put these PV a bit to change the situation .
C21 is a tariff for low voltage consumption. A little terrible power on Does this mean that the transformer station is the property of the operator and it supplies power to many customer points already as nn ?.

hupo , own transformer station exclusively for the company.

Added after 4 [minutes]:

The point is whether it is profitable in our climate zone, one of the initial offers amounts to PLN 1,500 thousand for the overall project implementation. The current monthly cost for electricity is about 57,000. zlotys.

Ryszard49 wrote:

It's about whether it's profitable in our climate zone,

The climate zone does not matter here, only the amount of funding or the purchase price of energy from renewable energy installations - it determines the profitability of investments in PV.

Xantix , I would prefer that users of such installations asked about this topic. There is no place here for craving, it is really big money.

Ryszard49 wrote:

I would prefer users of such installations to ask about it.

And I rather doubt that the owners of solar power plants were here on the forum.

Ryszard49 wrote:

There is no place here for craving, it is really big money.

And because they are it really big money then you can spend a relatively small amount and hire a professional company that deals with the design and calculation of the profitability of this type of investment?

Xantix in post # 4 I have clearly described the offer we received, the opinion with an opinion but I would prefer someone who uses such an installation to speak. I have read that in this particular case the bidder estimates the panels for 15 years of use.

Ryszard49 wrote:

I clearly described the offer we received

You didn't write anything. The amount of money paid for the installation says nothing about it.

Ryszard49 wrote:

but I would prefer someone who uses such an installation.

What? Give some parameters of this installation, even electric power - without that you can look at grounds.

Xantix , I gave electricity consumption per month, about 300,000 kWh and there are plans to buy several injection molding machines.

As for profitability, my intuition tells me that without funding and entering the system like a father does not make sense but as already mentioned in the forum it is difficult to calculate.
"PLN 1,500 thousand for the overall project implementation" for how much installation capacity? let's assume 400kWp?
In practice, the power consumed by the plant will not be even, there will be jumps and these 400kWp may be too much (the current power for balancing will not be used), which will worsen the final bill.

Returning to the question of what power will be generated from the installation of a specific power is a fairly accurate answer can be found on the site "PVGIS for Europe". As you can see from 400kWp only less than 50,000kWh per month in the two best months and 384,000 per year. I do not know such high connection capacity but 250MWh for PLN 75 thousand with transmission is probably very cheap? with such prices without subsidies, the payback period is 1500 / (at best (384000/250000) * 75) in the best case = 13 years?

PVGIS estimates of solar electricity generation
Location: 53 ° 21'26 "North, 19 ° 44'3" East, Elevation: 142 m asl,

Solar radiation database used: PVGIS-CMSAF

Nominal power of the PV system: 400.0 kW (crystalline silicon)

Fixed system: inclination = 35 °, orientation = 0 °
Month Ed Em Hd Hm
Jan 285.00 8820 0.83 25.6
Feb 542.00 15200 1.61 45.0
Mar 1200.00 37100 3.70 115
Apr 1620.00 48600 5.22 157
May 1670.00 51900 5.59 173
Jun 1660.00 49800 5.61 168
Jul 1530.00 47 400 5.24 163
Aug 1470.00 45600 4.98 154
Sep 1230.00 36900 4.01 120
Oct 818.00 25 400 2.57 79.5
Nov 351.00 10500 1.06 31.9
Dec 224.00 6930 0.66 20.4
Total yearly 384000

Ed: Average daily electricity production from the given system (kWh)
Em: Average monthly electricity production from the given system (kWh)
Hd: Average daily sum of global irradiation per square meter received by the modules of the given system (kWh / m2)
Hm: Average sum of global irradiation per square meter received by the modules of the given system (kWh / m2)

Xantia, what are you writing about? What discounts? This investment should only consider installations that produce as much energy as the company consumes on an ongoing basis. They need to determine their wear profile. If the load is constantly at a level of e.g. 500kW, then only 500kWp + - 10% installation pays off. Unless it's an east-west installation. The profitability can be calculated by setting the cost of 1 MWh that this company now has. The above installation will produce 500MWh in the year. Each larger installation will generate kWh, which they will not consume on a current basis, and for each kWh they will receive some amount, which is not the average from the previous quarter. Each grant will improve the financial conditions.

We want to help as much as we can, please do not be nervous and provide data on the power of the proposed PV installation. Information that

Ryszard49 wrote:

the bidder estimates the panels for 15 years of use.

is typical and insufficient. Within 15 years, inverters without a long-term warranty will be a burden on the owner. The way the installation is carried out in the field may be relevant. You won't run away from the cost of insurance.

With such consumption, the negotiated price for energy is probably PLN 190 / MWh + daytime transmission cost around PLN 170 / MWh and the PV installation replaces these total costs.

hupo , today I started the day collecting information on installation insurance, I chose PZU, and here a small zonk, the representative has no idea how to approach this particular topic. But he said the annual fee could be very high. Then the question arises whether, if the consumption of electricity decreases, the supplier will not change the price for 1kWh?

Once again, just like Xantix before, please give the parameters (first of all power) of the PV installation you were offered. Without this information, the discussion loses its meaning. If it were the power I wrote about earlier, then the reduction in consumption would be no more than 30% and only for a few months of the year, but it is only my "shag".

I do not know if it is possible to advertise in this way, but for us in Tarnów, the profitability of PV and optimization was counted by the company (efi state.pl). We had a consumption of about 80MWh / mc, but around the clock (70% during the day) and ultimately we made the installation smaller than intended, but apparently the most profitable and bills smaller as expected.

For such high consumption it is good to have a multi-zone tariff in sN and then the PV returns much slower (cheaper EE from the network), but in Poland it was too far to the sN cable and such a connection could not be made.

With the current tariff (C21) and solar installation costs, the project is unprofitable.