solarman Posted August 4, 2020 Posted August 4, 2020 Client has 20 x 360w (7200w) panels on the roof (roof, facing north). 5 strings of 4 2 x MPII in parallel SmartSolar MPPT 250|100. ESS system not feeding in to grid. Set to about 70% state of charge for self consumption. Why isn't the PV covering all the day loads? A looks normal in this image, but the B section. The client is using high consumer (iron) during this time. Shouldn't the array handle this consumption? B in image 2. red square in image 1 Quote
Beat Posted August 24, 2020 Posted August 24, 2020 First of all I'm afraid your 1st graph confuses kW with kWh. Remember kWh is energy (consumption), kW is power. I think your graph shows power in kW. What you should do is meter the daily consumption of your household. I made a statistic by reading and recording my meter monthly over years before installing solar. It boils down to an average daily consumption of about 10kWh. I found in internet a graph that shows for about 34°S that 9 330W panels yield in winter (June) just 10kWh per day. Important is the battery capacity. I installed 9.6kWh and found that now at a sunny day in August they will overcharge. So I'm planning to add 4.8kWh. This way it will cover a cloudy day and eventual consumption surge. Quote
solarman Posted May 24, 2022 Author Posted May 24, 2022 The Victron MPPT has a wattage limit, which is the main constraint in this system. 5800W Clint 1 Quote
Machine458 Posted June 6, 2022 Posted June 6, 2022 Is it a 24v or 48v system because the 24v would only take in 2900w and 48v is 5800w pv Quote
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