Nelumbo Energy, a.s.

Great satisfaction.

In the end, they solved all the problems, but it took a really long time.

"In the end, they solved all the problems, but it took a really long time..see description below" Problems arose in the first phase of implementation when the signing of the contract was about 3 months before the actual implementation and the beginning of the PV installation was postponed because they allegedly "have no material to install" (they had 3 months to order and prepare it). To shorten it .. the installation should take about 2-3 days with tuning .. they took turns at my house about 6 times .. it took them about 4 months, dug up all the electricity 3 times, added various circuit breakers. They could not operate and set up Converter (Solax). Eventually, a technician came to set it up directly from Solax. I still don't have a connection to the official distribution network after 6 months and I'm not talking about the subsidies they were supposed to handle ... The connection of batteries and their energy use also doesn't work as it should .. I end up studying the whole technology and putting the connection to SOLAX LAN / WIFI settings into operation, etc. "wall" min. 2 days. And the performance of the entire PV plant? Installed 4.4 kWh, the maximum I saw all the time was 3kWh and only 1x peak for a few minutes (rather it was some overvoltage: D, because I do not trust the installation at all). at an optimal temperature of 15-20 degrees and an ideal slope of the sun, the PV plant runs at a maximum of 2.9kWh without any fluctuations, so the real output is about 35% less, which is really a very big reduction!

Only the worst experience, assembly fwe disaster, all only externalists, when the left hand does not know what the right is doing, assembly perhaps 4 times without batteries, batteries after half a year. Involvement and molding disaster, crooked, unaesthetic. After cutting out the supply to the main switchboard, the electrician stretched the cable, I plastered it again and then they told me that there was no cable on the UPS, so I cut out again. The battery was delivered half a year apart, the battery reported errors, so it was changed, but even then it did not work as it should. Supposedly software errors. You cannot set the upper charge limit on the battery, so it shortens the life. After about 10 months of use, I already have 97% SOH. System monitoring does not work, it does not load electricity production at all, so I have no overview of production at all. I complained about the defect in February 2021 and unfortunately it has not been resolved in August 2021. The owner either does not communicate or just promises that in a week and another week in another week .... etc. The worst company I've ever dealt with in my life. Unfortunately, withdrawal from the contract is not the same as, for example, the purchase of shoes. I do not recommend the company, on the contrary.

Through external partners, Nelumbo has installed a 5.85 kWp PV plant with a 14 kWh battery. Originally it was supposed to be a 5.3 kWp and 12 kWh battery of their own production, in the end there was no material due to (or thanks to) covid, and therefore they supplied us with branded panels 450 kWp / panel and a branded Pylontech battery. The installation was quite painless, when the biggest problem was the prepared cable gland from the building, connected inside the shaft by a jumper, which in the meantime loosened and the gland was divided into two parts. But even then, the technicians managed to deal with it. We had to arrange the necessary excavation between the garage and the building ourselves, as well as the "fake gutter" with which they got to the roof. But the result is nice to look at and the installation is clean. Unfortunately, we did not avoid labor pains either. At first, the production did not work at all. The reason was the reversed phases, due to which the Goodwe inverter did not work. It took 14 days to discover the cause and a "specialist" had to come, although I later found out that the cause was also displayed in the control application. Another problem was power outages of the backup branch, when the inverter accidentally went into start mode and the backup branch did not work for about 5 to 15 minutes. Ideally when someone was showering in the bathroom at night or early in the morning, so suddenly totally dark. The inverter kept restarting, helping to completely disconnect and throw back manually. In the end, the firmware update solved the problem, but it took a month. Although the inverter manufacturer recommends installing a so-called bypass switch so that the backup branch can be powered, for example, when servicing the inverter, they do not normally put it into the project. At the same time, he could easily solve the problem just described. We have been waiting for its delivery for the fifth month, and they should have come to install it twice already, a person will book the whole day and not only will no one come, but no one will respond in time with an explanation. It is not possible to rely on the company in this direction, so it is necessary to verify two days in advance whether the agreed dates actually apply. However, what went well is the settlement of the subsidy and connection to the distribution. In about 4 months from the first payment, the subsidy was paid to us, the connection to PRE also went well. Overall, I am rather satisfied, although sometimes I tore my hair, how such an action is possible in the age of all kinds of electronic diaries. EDIT: So far, I am lowering the rating to 1 star, as the company has installed the inverter with bad circuit breakers in violation of the installation documentation and has responded to the complaint by promising a remedy - for several months now. I have been waiting for 9 months on the bypass of the backup circuit, which turned out to be needed about 10 times. So far, I can only recommend this company to avoid the arc. By paying the last invoice, any service ends and they leave the clients totally stuck.

Good day, at the end of 2021, I decided to solve the supply of expensive electricity by building my own photovoltaics on a family house. I didn't have to choose a supplier for a long time, I contacted the company NELUMBO Energy a.s., which installed a solar system for additional heating and DHW heating a few years ago. I am still very satisfied with their quality work and without faulty operation of the solar system. The company NELUMBO Energy a.s., prepared a tailor-made offer for me, despite the difficult situation with the development of the Covid 19 disease, gradually installed photovoltaic panels on the roof of the house according to my ideas and very quickly put the whole system into operation. The assembly company worked on both the panels and the installation of the batteries and the connection to the electrical network of the family house, it was qualified, in my opinion, and it did a quality job. The first days of photovoltaic operation show that everything is properly installed and the achieved values ​​of electricity production correspond to the specified parameters. During the fulfillment of the contract, the communication with the employees of NELUMBO Energy a.s. was very helpful, constructive and led to the fulfillment of my requirements. I believe that the photovoltaics installed by NELUMBO Energy a.s. will for many years reliably produce electricity for a family house as well as a solar water system. I thank all members of the company and their suppliers for their timely and quality work and I look forward to future cooperation. Ing. Josef Růt