Pren Posted August 26, 2020 Posted August 26, 2020 Hi. Anyone with experience in using the Smart Load function on the Deye / SunSynk inverters? I have 5KWp PV but using on average under 2KW at any time during the day, so want to connect one geyser to the inverter using the Smart Load feature. System is grid tied and works very well, but want to optimise the use of the 5KWp panels and 8Kw inverter! Recommendations on any energy efficient geyer elements that I can use? Quote
JustinSchoeman Posted August 26, 2020 Posted August 26, 2020 How is it wired up? If you are running grid tied, it should be pushing all excess power to the grid side already? Quote
Pren Posted August 26, 2020 Author Posted August 26, 2020 It is grid tied but not delivering to the grid as not enabled - Jhb CityPower does not buy excess power currently. The SmartLoad function is programmed into the inverter and allows non-essential loads to be powered with excess power before selling to the grid (if it was allowed) Quote
JustinSchoeman Posted August 26, 2020 Posted August 26, 2020 If the CT coil is installed, select 'No export to grid' option, and it will only export enough to power the house load (no excess energy past the CT coil). Quote
Achmat Posted August 26, 2020 Posted August 26, 2020 As Justin says, the inverter is bidirectional and will push power to loads connected on the grid side of the inverter but you must have the CT sensor connected for this to work properly. Not sure if the screens but the should be an option for limit to load or limit to home. You want to activate the limit to home with zero export enabled. Quote
Pren Posted August 27, 2020 Author Posted August 27, 2020 Thanks Justin and Achmat: Not sure what the CT sensor is but it is obviously configured to power just the household load. There is definielty no export to grid as I can see that the power generation of the PV matches the house load. This is the excess capacity that I want to channel to a spare geyser Quote
JustinSchoeman Posted August 27, 2020 Posted August 27, 2020 I am still busy with my installation. But I intend to put the whole house on the inverter (geyser included). The big drawback is that the geyser draws a substantial portion of the available inverter load. I am half way through building a smart switch for the geyser, talking to the inverter. Basic logic will be: 1) when battery level below ~30% turn off geyser 2) when total inverter load above 7kWh, then turn off geyser until the total load has been below 3kWh for 15 minutes. 3) stretch goal - add a geyser thermostat and add time of day rules to heat geyser to max while solar is available, and only keep it at a bare minimum otherwise. This way the geyser effectively does not affect the total available inverter load. At the moment, I am still working with Deye to implement the 'Island mode signal'. Once that is sorted, I may ask them to consider implementing this as a Smart Load feature. Quote
Halcyon Posted August 27, 2020 Posted August 27, 2020 Hi Justin, for interest does the current functionality of the smart load feature not have enough programmability "almost" to achieve what you want to do? To my knowledge the smart load can be programmed to switch on and off based on the battery SOC and the power produced on panels. e.g, you can program if the battery above 30% and solar power in excess of 4kw then smart load will switch on and could power your geyser. Quote
JustinSchoeman Posted August 27, 2020 Posted August 27, 2020 1 hour ago, Halcyon said: Hi Justin, for interest does the current functionality of the smart load feature not have enough programmability "almost" to achieve what you want to do? To my knowledge the smart load can be programmed to switch on and off based on the battery SOC and the power produced on panels. e.g, you can program if the battery above 30% and solar power in excess of 4kw then smart load will switch on and could power your geyser. Yup. Almost, but not quite... I also want to turn the geyser off if the total load is too high. 8kW only goes so far... Quote
Pren Posted August 27, 2020 Author Posted August 27, 2020 8 hours ago, JustinSchoeman said: I am still busy with my installation. But I intend to put the whole house on the inverter (geyser included). The big drawback is that the geyser draws a substantial portion of the available inverter load. I am half way through building a smart switch for the geyser, talking to the inverter. Basic logic will be: 1) when battery level below ~30% turn off geyser 2) when total inverter load above 7kWh, then turn off geyser until the total load has been below 3kWh for 15 minutes. 3) stretch goal - add a geyser thermostat and add time of day rules to heat geyser to max while solar is available, and only keep it at a bare minimum otherwise. This way the geyser effectively does not affect the total available inverter load. At the moment, I am still working with Deye to implement the 'Island mode signal'. Once that is sorted, I may ask them to consider implementing this as a Smart Load feature. @justinschoeman Not sure why you would need to do this as I understood the Smart Load function caters for most of this anyway. It does not appear that it draws from the battery or grid, but only from PV and only when there is excess capacity. Unfortunately there is no Deye material to explain this but perhaps SunSynk explain the operations better - they are basically the same inverter There is a short YouTube video: Quote
JustinSchoeman Posted August 27, 2020 Posted August 27, 2020 I am going for an off-grid setup, so I need to be able to power my load from battery too. Quote
Zimnismoboy34 Posted October 20, 2020 Posted October 20, 2020 After reading through this.. makes a whole lot of sense. Now the Magical question ... i have a CT sensor with a cable and the house has no provision for any extra cable (CT sensor twisted pair ) to be run to the DB board . i know this is a long shot and possible . The CT sensor uses a 0v to 1000mv (1v) signal to measure amps . Now if it is possible at all .. can i make this wireless . I wish Deye had done so . MAybe using to Arduino Nano boards and wifi units ? Some one point me in the right direction I need to get this working but dread running a fresh cable . Trunking etc which can be done but time consuming . Quote
AlbertG Posted October 24, 2020 Posted October 24, 2020 The is currently a fault with the smart load function it keeps on tripping. They are fixing the firmware. Deye 8kw The people that don't know which panels to use I can suggest Canadian Solar 365w 4 strings of 7 or 370w in the same config. Deye 8kw. The flat roof stands 36 degrees facing North in Pretoria Sout Africa. 28 x 365w Canadian Solar panels Gif 10.220kw can also use 370w panels will give you 10.36kw that is under the 10.4 of the inverter and in the 18amp range. the best so far had 16.7 amp although the panels are 9.18 amp each. Bye the way if your meter have the sine at he bottom it can not turn back with grid tie. Quote
AlbertG Posted November 13, 2020 Posted November 13, 2020 I hade a issue with the smart load function on my Deye 8kw. there were a firmware update Wednesday 11/11/2020 and now there is not any issues. In connection with the Geyser I will use a 2kw element on the geyser so if the is not enough power from PV so it do not drain yoyou must ur battery. On the inverter you must enable the smart load function, where you also set the state of the battery when it must switch of if the is no grid. The watt setting on smart load must bet set for a value bigger than your geyser element. Quote
ojeysky Posted December 20, 2020 Posted December 20, 2020 (edited) I am expecting a 8kw Deye as well, as a current MPP user am hoping the experience will be better, especially with LFP charging. I like to get it's data to emoncms, is there a way to achieve this? Also the does it support mqtt? Edited December 20, 2020 by ojeysky Quote
Achmat Posted December 20, 2020 Posted December 20, 2020 24 minutes ago, ojeysky said: I am expecting a 8kw Deye as well, as a current MPP user am hoping the experience will be better, especially with LFP charging. I like to get it's data to emoncms, is there a way to achieve this? Also the does it support mqtt? Another user in the post below created something for the sunsynk. The sunsynk and deye inverters are very similar. Quote
JohannF01 Posted September 20, 2022 Posted September 20, 2022 Hi All. Need some advice please regarding Smart Load geyser connections and load shedding. If you connect your geyser to the Smart load output, will it be "disabled" during load shedding? I have a 3KW Geyser connected to my Deye 8kw with only 1 x 4.8kw battery but keep on tripping during load shedding if the geyser timer come on. I believe this is a normal preventative function to protect the battery, so my question is - if i connect my geyser to the smartload and it is load shedding, will the inverter automatically "disable" the port until the grid is back on line? Might be a silly question but please bear with me Quote
Sc00bs Posted September 20, 2022 Posted September 20, 2022 On 2020/10/24 at 1:02 PM, AlbertG said: The is currently a fault with the smart load function it keeps on tripping. They are fixing the firmware. Deye 8kw The people that don't know which panels to use I can suggest Canadian Solar 365w 4 strings of 7 or 370w in the same config. Deye 8kw. The flat roof stands 36 degrees facing North in Pretoria Sout Africa. 28 x 365w Canadian Solar panels Gif 10.220kw can also use 370w panels will give you 10.36kw that is under the 10.4 of the inverter and in the 18amp range. the best so far had 16.7 amp although the panels are 9.18 amp each. @AlbertGThere is no 10400W limit on the number of panels that you can install, the limit is on the amount of DC power that the inverter will handle. Limit on the AC power the inverter can produce is 8800W, so if your panels are making 10400W you are going to be putting at least 1600W of power into the batteries. If there is no where for the power to go the MPPT will throttle the amperage down to required levels. If your panels want to produce more than 10400W, the MPPT's increase their internal resistance to reduce the amps being produced by the panels and keep the total DC power to under 10400W. I have 12400W of panels on my 8kw Sunsynk. The benefit of over speccing the solar panels and having more than 10400W of panels is not on the sunny days but more on the marginal solar production days where I can still make sufficient power to charge batteries etc. There is very little benefit on high solar radiation days except for maybe early in the morning or late in the afternoon when production is lower. Maximum amps is 18A, if you have panels that can push 20A the mppt will just throttle it down to 18A. Voltage is however another kettle of fish altogether, the MPPT's cannot throttle the voltage and going over the max rated voltage of your MPPT will result in fire/flames/melted mppt's. Quote
Sc00bs Posted September 20, 2022 Posted September 20, 2022 36 minutes ago, JohannF01 said: Hi All. Need some advice please regarding Smart Load geyser connections and load shedding. If you connect your geyser to the Smart load output, will it be "disabled" during load shedding? I have a 3KW Geyser connected to my Deye 8kw with only 1 x 4.8kw battery but keep on tripping during load shedding if the geyser timer come on. I believe this is a normal preventative function to protect the battery, so my question is - if i connect my geyser to the smartload and it is load shedding, will the inverter automatically "disable" the port until the grid is back on line? Might be a silly question but please bear with me Hi @JohannF01 You are 100% correct, the geyser element will automatically not work when there is load shedding if it is connected on the Smart Load/Non-Essential side of the inverter. The connection is essentially the same as a having a grid-tied inverter running that part of the inverter. If the DEYE inverter is the same as the Sunsynk, you can specify at what battery SOC and above what solar production level it should start feeding running the Smart Load from solar power and at what SOC it will disconnect the load and switch it back to grid. You should have an error in your inverter which will tell you what is causing the tripping but I would guess that it is more than likely your battery. Depending on what the C rating is of the battery you have, it would probably be able to supply either 4.8w (1C) or 2.4kw (0.5C), going over those numbers will result in a DC error on the inverter and it tripping out. Quote
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