SamSA

basically, you have a Black Friday lemon For South Africa lead acid batteries make no sense. There is absolutely no logical valid reason why any type of Lead Acid based battery has any value for systems required to cycle at the rate required in SA due to load shedding. They will work and maybe you can at least use them until they die probably in a few months to year at most (unless you use only 30% of the total capacity on every cycle) Do the math for upfront and longevity costs and it's obvious that lithium is the cheapest and most reliable option.

Hi Joey Yes, there is a PV isolator. Have tried that and it has no effect. When changing to SBU it will either not change at all or infrequently will only use the battery and despite the available PV input value showing at bottom left the solar input line in does not display - implying it is not using solar. Not exactly sure of the Firmware version: Info displayed for the both inverters shows build number 008.00/009.00 The info for both dataloggers show Firmware version: 1.7.7.7

Anyone know of Growatt experienced repair/fault finding services in the Gauteng / Pretoria area ? System was installed by Solar SA in 2019 / 2020. They are not an option for service.

Setting 12: 46 Setting 13: 54

We have 2 X Growatt SPF 5000TL HVM-WPV parallel connected inverters with 2 X 5.2Kwh Lithium batteries and 22 X 280w solar panels (array of 12 connected to inverter 1 and 10 on inverter 2) Normal use: setting 1 - 'SBU' : power from solar during the day, switches over to battery / solar as the sun drops, then battery only and switches to grid once battery is depleted. If there is expected grid outage at night we switch setting 1 to 'UTL' one or two hours before sunset to conserve the battery power. This gives Grid power with battery charge until grid is off and continues with battery power. Previously we could change setting 1 to SBU in the morning and it would automatically start utilizing solar and disconnect from grid if solar/battery was enough for load. This no longer works. Now the only way to get SBU working correctly is to shut down and restart the whole system. Auto switch to UTL works but not from UTL to SBU see attached Growatt_SBU_switch_fail360.mp4

Hi Jannie Total production is a matter of a lot of factors to give kWh per day/month/year. The question is not about total production. The point was to remove the variable factors and determine real world results for the maximum spot power output expected vs the PV panel rated value - the PV panel rating value is not kWh. Graph below is for an installed system with 21 X 330W panels on a very sunny day. Max power was just over 4kW.

Thanks Fazil / Riaan Looks like we have both higher and lower than rating value real world results. Being conservative it appears that i should not expect the peak "spot" output to be less than 90% of the PV panel rating. Anything higher is bonus. 6930 X * 90% = ~ 6200W

Not specifically referring to any make or the total kwh per day or any other setup losses. Just want to know what would the expected maximum Wattage output be if nothing is limiting solar. Is the 330W rating given as the expected maximum output? 21 panels = 330 X 21 = 6930W Only cabling / inverter / setup would actually be responsible for further loss? ps: Re: "On a 20 panels setup I am avg around 44kw/day" I didn't want to complicate the calculation further with a kwh value.... # hours sun per day is variable If you have 5 hours per day of maximum solar eficiciency: W = 44/5 = 8800W max output -> which is obviously far higher than 330 X 20 = 6600 ... so obviously you get more than 5 hours sun per day (44/8 = 5500W) and output is lower before and after peak. ... whatever the hours of sun it looks like your maximum Wattage output is very similar to the calculated max of 330 X 20 = 6600 ?

What would the expected actual real world PV output be for 21 330W panels. According to the given rating the maximum theoretical output is 6930W. What should we though expect the real output to be In Pretoria at peak with no clouds?

Does no replies since May 7 imply Nobody is using Growatt in SA? Got a quote for a 10 KW system using two 5 KVA Growatt hybrid inverter -5KW . Comments?

Quote received for a grid tied solar setup with a single Mecer 4Kw Infini Hybrid inverter.

Anyone using a Mecer 4Kw Infini Hybrid inverter. Experience ? Concerns?