Posted December 16, 20213 yr Total newby here with next to zero knowledge of any form of electrical systems. What I have: 7.2 Kw inverter 5.1 Kw lithium iron battery 1620 W of solar panels Typically the solar panels will supply (on a sunny day, of course) between 30 and 40-something % percent the active power used by the house. Example right now: House usage at present is 218 W, input from panels is 99 W. The battery is fully charged (and priority is set to 1=solar 2=grid and 3=battery). My question is: should the solar panels not provide a figure closer to 100% of the active power usage (assuming enough sunlight available)? Thanks in advance.
December 16, 20213 yr What is your daily average of power produced by the panels? Most people get about 4 X Installed PV in Winter and 6 (max) x PV installed in summer (provided there's no rain, of course). If you're getting that total spread over the day then its about right.
December 16, 20213 yr 5 hours ago, Tinmug said: Total newby here with next to zero knowledge of any form of electrical systems. What I have: 7.2 Kw inverter 5.1 Kw lithium iron battery 1620 W of solar panels Typically the solar panels will supply (on a sunny day, of course) between 30 and 40-something % percent the active power used by the house. Example right now: House usage at present is 218 W, input from panels is 99 W. The battery is fully charged (and priority is set to 1=solar 2=grid and 3=battery). My question is: should the solar panels not provide a figure closer to 100% of the active power usage (assuming enough sunlight available)? Thanks in advance. So it sounds like maybe that is because your inverter is drawing a small amount of power from the grid (to prevent feed in to the grid). What inverter do you have.
December 16, 20213 yr Author 7 hours ago, FixAMess said: What is your daily average of power produced by the panels? Most people get about 4 X Installed PV in Winter and 6 (max) x PV installed in summer (provided there's no rain, of course). If you're getting that total spread over the day then its about right. Not sure. The figures I quoted is real-time. The panels are (as I understand it) capable of 1300+ Watts (3x 540 W). I'd like to establish if the panels can, theoretically, provide enough power to not draw from Eskom (during the day). Edited December 16, 20213 yr by Tinmug
December 16, 20213 yr Author 5 hours ago, Basil Katakuzinos said: So it sounds like maybe that is because your inverter is drawing a small amount of power from the grid (to prevent feed in to the grid). What inverter do you have. I have a Kodak 7,2 Kw off-grid inverter.
December 16, 20213 yr 10 hours ago, Tinmug said: Total newby here with next to zero knowledge of any form of electrical systems. What I have: 7.2 Kw inverter 5.1 Kw lithium iron battery 1620 W of solar panels Typically the solar panels will supply (on a sunny day, of course) between 30 and 40-something % percent the active power used by the house. Example right now: House usage at present is 218 W, input from panels is 99 W. The battery is fully charged (and priority is set to 1=solar 2=grid and 3=battery). My question is: should the solar panels not provide a figure closer to 100% of the active power usage (assuming enough sunlight available)? Thanks in advance. Hi @Tinmug, that sounds about right. The Axperts inverters with AC power blending will always mix in a bare minumum amount of grid power with solar and that is in the order of 100watt. According to @Coulombit is done in order to do with stability and to disallow power to be inadvertantly being exported to grid during the mixing-blending function. If you remove grid , you will see the solar takes over that 100w , in addition to the internal system requirement. So your inv is functioning correctly. Edited December 16, 20213 yr by dropkick
December 16, 20213 yr Author 43 minutes ago, dropkick said: Hi @Tinmug, that sounds about right. The Axperts inverters with AC power blending will always mix in a bare minumum amount of grid power with solar and that is in the order of 100watt. According to @Coulombit is done in order to do with stability and to disallow power to be inadvertantly being exported to grid during the mixing-blending function. If you remove grid , you will see the solar takes over that 100w , in addition to the internal system requirement. So your inv is functioning correctly. Fantastic, thank you very much for confirming. 👍
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