June 1, 20242 yr Observed that my lights dims for a fraction of a second when one of my fridges starts up--Even with the VICTRON 8KW (Loan unit) I saw that--Now I am running 2x5kw Growatt inverters ---Is it that the capacitors in these are to small ?? If it is the issue can I install an external capacitor between the inverter output and db board ??? Cheers Mark
June 1, 20242 yr Just a sanity check, on what type and capacity of battery(ies) you have installed, and what type of surge power it can handle.
June 3, 20242 yr Author On 2024/06/01 at 6:18 PM, GreenFields said: Just a sanity check, on what type and capacity of battery(ies) you have installed, and what type of surge power it can handle. Hi--it is 2x5kwh batteries supplied by LithiumSA --Batteries are in parallel with 10mm wires to inverters
June 3, 20242 yr On 2024/06/01 at 4:50 PM, zs1ssm said: Observed that my lights dims for a fraction of a second when one of my fridges starts It can also be that the wire between the inverter and loads is too thin causing a volt drop when fridge starts up.
June 3, 20242 yr If one assumes that the right cable sizes are used with the batteries plus inverters in question then one should not see a large drop in V. If looking at 10 kWh batteries being fed with only 10 sq mm cable which for me is quite a bit too small. Further try and fit another type of LED bulb. Some do have lower quality controllers inside that might flicker for the slightest change in Volts.
June 4, 20242 yr Author Thanks all---Just to add --Each battery is bridged to the inverters-- One 5kw inverter has 10mm from one battery and the second one is the same--The bridge is between the 2 batteries --so 10kw is shared by 2x10mm cables--I could be wrong--But system is running 100%--Only problem is that the Growatt dongles can not be combined to give the combined reading --Some one at Growatt that can assist ???? Edited June 4, 20242 yr by zs1ssm Explain with drawing
June 5, 20242 yr Author On 2024/06/03 at 9:00 PM, Gerrie said: It can also be that the wire between the inverter and loads is too thin causing a volt drop when fridge starts up. Had a check on the cable size from the inverters to the db box and the size is the same as the "eskom" incoming lines--So I think that the inverters initial power boost (is that what you call it) is to low
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