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optimum battery size
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<blockquote data-quote="Portsolar" data-source="post: 553369" data-attributes="member: 37777"><p>Thank you both for your interest. I don't have any off-peak tariff. I have experimented with the charge and discharge schedule, but its not useful at present. Attached is a typical plot from a recent cloudy day, showing the discharge and recharge from 15 to 20% in purple. There was very little load that day, the app doesn't show a load of less than 100W, goodness knows why not. It just managed to get to 21% with a bit of sun! </p><p>This evening I have set the limits, called ForceCharge SOC and Overdischg SOC to 15 and 16%. The system won't let me set them equal to each other, even though the Solis manual says that can be done. That might stop recharge from the grid unless the battery self-discharged (unlikely for a day or so). The manual also gives a contradictory description of Overdischg SOC (para. 6.6.6.2). The option to prevent recharge from grid is overridden when ForceCharge SOC is reached. Sorry to ramble on![ATTACH]16475[/ATTACH]</p></blockquote><p></p>
[QUOTE="Portsolar, post: 553369, member: 37777"] Thank you both for your interest. I don't have any off-peak tariff. I have experimented with the charge and discharge schedule, but its not useful at present. Attached is a typical plot from a recent cloudy day, showing the discharge and recharge from 15 to 20% in purple. There was very little load that day, the app doesn't show a load of less than 100W, goodness knows why not. It just managed to get to 21% with a bit of sun! This evening I have set the limits, called ForceCharge SOC and Overdischg SOC to 15 and 16%. The system won't let me set them equal to each other, even though the Solis manual says that can be done. That might stop recharge from the grid unless the battery self-discharged (unlikely for a day or so). The manual also gives a contradictory description of Overdischg SOC (para. 6.6.6.2). The option to prevent recharge from grid is overridden when ForceCharge SOC is reached. Sorry to ramble on![ATTACH]16475[/ATTACH] [/QUOTE]
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