April 7, 20233 yr I'm trying to work out my daily usage from SA stats. If I look at 6th April for example my load was 13.8kWh. Is that my total 24hr usage? I'm not sure as PV was 15.7 and battery was charged and discharged equally the same so what happened to that extra PV? Eskom mains breaker is switched off and whole house is being powered off grid for now.
April 7, 20233 yr The daily totals are from midnight to midnight. In your snapshot you will see your 7 Apr data is the battery usage since midnight till the time you took the snapshot, i.e. 3,5kWh. Your Load was 2,9kWh. The difference is what was consumed by your Inverter and other losses. Your Inverter usage is not included in your load. Typically 50 to 70Wh depending on the Inverter. If you only use battery, then that usage is included in the battery discharge, but when you have solar and the battery is charging then the Inverter will essentially be powered by solar as the usage from the battery is part of the solar charge at the time and this usage is not part of the load measurement but it is included in the Solar PV value. Edited April 7, 20233 yr by zsde
April 7, 20233 yr Author 10 minutes ago, zsde said: The daily totals are from midnight to midnight. In your snapshot you will see your 7 Apr data is the battery usage since midnight till the time you took the snapshot, i.e. 3,5kWh. Your Load was 2,9kWh. The difference is what was consumed by your Inverter and other losses. Your Inverter usage is not included in your load. Typically 50 to 70Wh depending on the Inverter. If you only use battery, then that usage is included in the battery discharge, but when you have solar and the battery is charging then the Inverter will essentially be powered by solar as the usage from the battery is part of the solar charge at the time and this usage is not part of the load measurement but it is included in the Solar PV value. Thank you. So the load number is my total daily electricity usage in the home less the losses from powering the inverter?
April 7, 20233 yr 5 minutes ago, Chris_S said: electricity usage in the home less the losses from powering the inverter? Yes, the Inverter usage and other minor losses will be part of the solar PV within a 24 hour period.
April 7, 20233 yr I recently got myself an energy meter which I installed at my change over switch and I shall use that to compare the load as recorded by SA with the load of this meter. Will do a month to month comparison to see how well they match up.
December 12, 20232 yr On 2023/04/07 at 8:10 AM, zsde said: I recently got myself an energy meter which I installed at my change over switch and I shall use that to compare the load as recorded by SA with the load of this meter. Will do a month to month comparison to see how well they match up. What was the result of this comparison?
December 12, 20232 yr 7 minutes ago, I84RiS said: What was the result of this comparison? Within about 5% of each other. It becomes one's choice which one to believe 🙃 I strictly use Solar Assistant data for my stats though.
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