March 28, 20233 yr 28 minutes ago, Zombie said: 1. You should aim to get your array as close to 550V as possible (for efficiency maybe)? 2. If so do you calculate using the panel's STC or NOCT value? 3. If so do you calculate using the panel's Vmp or Voc value? 1. Difficult to say without inspecting the design of the MPPT. 2/3. If you can export, you go on Vmp for the 550V target, as long as Voc is below 650 for all possible temperature conditions. If you cannot export, you use Voc and the 550V target. The MPPT will derate once you go over 550V during operation, so it is not recommended.
March 28, 20233 yr Voltage is from 160 - 800 V and 550 V for better efficiency but in my case i can only make 12 panels so 400 V around STC using for calculation.. is this correct ?
April 14, 20233 yr Hi, I have a similar plant which is working fine as long as the grid is on. At grid off or load shedding Deye turns off and the battery is not feeding the house. Pls. could you post your whole settings?
May 17, 20233 yr On 2022/11/24 at 8:48 PM, Steve87 said: Hi @kamosto answer your question: Yes this was as directed by Niko, the Felicity Solar engineer. My absolute take on these batteries as I was not part of this battery purchase. I was merely as to install these as the client purchased all this equipment himself & I was contracted to carry out the installation only. I have shipped & built a few battery LFP packs myself. I have built 100ah (5kWh), 120ah(6kWh) & actually the 230ah(12kWh) my take on these batteries is that at R46k for this built pack is an absolute bargain. You cannot order these 230ah cells for that money. They are 0.5C & this is where my mind & imagination runs away with me. the reason is that why rate them at 0.5C? I have built packs using CATL as well as EVE cells. These cells are 1C rated. So why would they derate them ? There can be another reason & that could be the BMS limitation. Meaning they have 230ah cells but paired with a 120A BMS & this could be the reason, so I hope is the case. The Seplos local manufacturer here in SA have the same issue with their new 12kWh battery that is sold at R56k. They are using the old Seplos BMS & that derates to an output of at 0.5C. I Wish I could lay my hands on an example of these batteries & carry out some tests on the Felicity batteries. I have the necessary diagnostic & amp measuring equipment to tell the reel truth of capacity etc. I noticed that the enclosure is also screwed on & very easy to remove. But having deboxed these 2 units from supplier shipping as well as pair them with the Deye. The quality & easy of use was outstanding. The rest of the details lies hidden behind the skin. But the price of these tells me we are missing something. Either these are not 230ah cells & are actually 280ah cells that are derated due to being 2nd life. Or this is one of the best bang for ones buck. A Very intriguing journey awaits for owners of these. I hope its a winner !!! hi do you have any more info on the felicity batteries, your thoughts and insight on if its really good bang for your buck ?
May 18, 20233 yr Author No info further except they still in good operation. My opinion it's a good very reasonably priced LFP pack. If it breaks down I can repair & install & replace new components as required including cells, BMSs etc. But at this point in time best bang for the buck.
August 27, 20241 yr On 2022/11/17 at 8:23 PM, Steve87 said: She is alive 🤣 what is neutral to earth bounding relay , what its function? , can this inverter installed without earthing ?
August 27, 20241 yr 1 hour ago, esmail-kassir said: what is neutral to earth bounding relay , what its function? , can this inverter installed without earthing ? The 12kw 3 phase inverter has internal bonding relay , just make sure signal island mode is ticked in the settings.
August 27, 20241 yr 1 hour ago, Nexuss said: The 12kw 3 phase inverter has internal bonding relay , just make sure signal island mode is ticked in the settings. what is the technical and electrical use of it ?
August 27, 20241 yr 16 minutes ago, esmail-kassir said: what is the technical and electrical use of it ? here is a nice copy paste for you as i am too lazy to type... Earth neutral bonding is an important aspect of electrical safety and system performance, particularly in solar power systems like those with Sunsynk inverters. Here’s a breakdown of why it’s required: 1. Electrical Safety Ground Fault Protection: Proper earth neutral bonding ensures that if there's a fault in the system, such as a short circuit, the fault current has a safe path to the ground. This helps in quickly clearing faults and protecting both people and equipment. Prevents Shock Hazards: By bonding the neutral to earth, you help ensure that exposed metal parts of the electrical system don’t carry a dangerous voltage relative to the ground, reducing the risk of electric shock. 2. System Performance Stable Voltage Levels: Earth neutral bonding helps maintain stable voltage levels in the system by providing a reference point for the neutral. This can improve the performance and efficiency of the inverter and other electrical equipment. Reduced Electrical Noise: Proper bonding can minimize electrical noise and interference, which can be beneficial for sensitive electronic components within the inverter. 3. Compliance with Electrical Codes Regulatory Requirements: Many electrical codes and standards require proper earth neutral bonding to ensure safety and performance. Compliance with these regulations is necessary for both legal and insurance reasons. Manufacturer’s Specifications: Sunsynk and other inverter manufacturers often have specific requirements for earth neutral bonding to ensure the system operates correctly and safely. 4. System Reliability Consistent Operation: Proper bonding contributes to the reliable operation of the inverter and other electrical components by providing a stable reference for the system’s electrical circuits. Troubleshooting: With correct bonding, it’s easier to troubleshoot and diagnose issues within the system, as the ground and neutral have a defined relationship. In summary, earth neutral bonding is crucial for ensuring the safety, performance, and compliance of a solar power system. It provides a secure path for fault currents, helps stabilize the system, and ensures adherence to regulatory standards. If you’re setting up or maintaining a Sunsynk inverter system, it’s essential to follow these guidelines carefully to ensure everything operates safely and effectively.
August 27, 20241 yr 6 hours ago, Nexuss said: here is a nice copy paste for you as i am too lazy to type... I am shocked, please forgive the pun. 😆 At least you admitted that you are lazy 🤣 10/10 for honesty 6 hours ago, Nexuss said: Proper earth neutral bonding ensures that if there's a fault in the system, such as a short circuit, the fault current has a safe path to the ground. <In my best Mike Holt voice:> "Now write this down: Current leaves the source and returns to the source. Current does not seek a path to ground." Electrons will use whatever is in their path, be it ground, be it your body, to get back to the source. 6 hours ago, Nexuss said: This helps in quickly clearing faults and protecting both people and equipment. "No. Grounding does not clear a fault. The only way to clear a fault is to switch it off." The rest of it looks like a pile of "woke" AI gobbledegook guesswork too. Lest we forget, here is the video. I encourage all to watch it, and watch it again if you don't understand at first. It took me a few tries, eventually I watched it, whilst following his instructions to write it down. That worked, and I watched it again afterwards.
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