June 6, 20233 yr I have two inverters sun-6k-sg03lp1 connected in parallel that work without a grid (only with pv and battery). The photo shows the actual self consumption of two inverters for the month of May. Self consumption is quite significant. Does anyone have any ideas on how to reduce the inverters self consumption?
June 6, 20233 yr 50 minutes ago, Ed Zozulya said: I have two inverters sun-6k-sg03lp1 connected in parallel that work without a grid (only with pv and battery). The photo shows the actual self consumption of two inverters for the month of May. Self consumption is quite significant. Does anyone have any ideas on how to reduce the inverters self consumption? My take on this is power generated from PV that you used directly to your load and did not go to the battery 1st. It is not the power the inverter used. The self used is 6.3kwh per day. Edited June 6, 20233 yr by Scorp007
June 6, 20233 yr Author 1 годину тому Scorp007 сказав: Я вважаю, що це енергія, вироблена від PV, яку ви використовували безпосередньо для свого навантаження, а не передавали спочатку в батарею. Це не потужність, яку використовує інвертор. Власне споживання становить 6,3 кВт/год на день. Yes, I agree. This is own consumption (idling) + costs for converting energy from direct current to alternating current.
June 6, 20233 yr Author 1 hour ago, Ed Zozulya said: Yes, I agree. This is own consumption (idling) + costs for converting energy from direct current to alternating current. in this case "Self consumption" it is: SelfConsumption = PV + BatteryDischarge - BatteryCharge - Load i.e. all lost energy
June 6, 20233 yr 1 hour ago, Ed Zozulya said: Yes, I agree. This is own consumption (idling) + costs for converting energy from direct current to alternating current. Self deleted. Edited June 6, 20233 yr by Scorp007
June 7, 20232 yr Author It seems to me that it is necessary to add a certain algorithm for disabling the slaves inverter. For example, in the absence of solar generation and low load - turn off slave inverter. And turn on the slave inverter when the load increases or the sun appears. I tried to turn off the slave inverter manually, but the master also turned off. Therefore, firmware correction is necessary. How realistic is it that deye developers firmware will implement such an algorithm? Have you tried suggesting changes to the firmware?
June 7, 20232 yr 2 hours ago, Ed Zozulya said: It seems to me that it is necessary to add a certain algorithm for disabling the slaves inverter. For example, in the absence of solar generation and low load - turn off slave inverter. And turn on the slave inverter when the load increases or the sun appears. I tried to turn off the slave inverter manually, but the master also turned off. Therefore, firmware correction is necessary. How realistic is it that deye developers firmware will implement such an algorithm? Have you tried suggesting changes to the firmware? The ramp-up could be an issue, as the load is shared between the inverters. What then happens if your load spikes from say 1kw to 8kw - the slave inverter needs about 2mins to startup - does the house then trip?
June 7, 20232 yr Author 2 hours ago, mzezman said: The ramp-up could be an issue, as the load is shared between the inverters. What then happens if your load spikes from say 1kw to 8kw - the slave inverter needs about 2mins to startup - does the house then trip? There are nuances. Unfortunately, they are known only to the firmware developer.
June 7, 20232 yr Keep in mind that each battery consumes around 15w-30w constantly, depending on the model. And a 1P inverter will use from around 20w-40w on idle, up to 60+w depending on the load. A three phase 12kw-15kw inverter can hit 100w on full load easly. Edited June 7, 20232 yr by Bursu
June 13, 20232 yr On 2023/06/06 at 12:28 PM, Ed Zozulya said: I have two inverters sun-6k-sg03lp1 connected in parallel that work without a grid (only with pv and battery). The photo shows the actual self consumption of two inverters for the month of May. Self consumption is quite significant. Does anyone have any ideas on how to reduce the inverters self consumption? I have a Deye 5kW inverter and when I measure input and output wattage with my Efergy engage I also see around 190W self consumption. I also checked the battery usage when idle and it is around 10W, so the 190W I am seeing is close to the 196W you are seeing. Very annoying, that is 4.56kW a day just wasted. Edited June 13, 20232 yr by HendrikBigChief
June 14, 20232 yr There is a video on sunsynks YouTube about this. Actual consumption is not that high. It's a measuring error
June 16, 20232 yr Author On 2023/06/14 at 1:55 PM, Chris_S said: Про це є відео на YouTube sunsynks. Реальне споживання не таке велике. Це помилка вимірювання Battery Charge and Battery Discharge measured via Victron SmartShunt generation PV and Load measured via Deye. via formule SelfConsumption = PV + BatteryDischarge - BatteryCharge - Load here SellfConsumption means All Energy loss Where measuring error? Load, PV ?
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