Zwy
Emperor Of Solar
Going on day 3 of no sun and no real PV yield. My battery is 54Kwh. First day with heat pump on we used 32% of the bank, yesterday used 28% ( I did see some charging for about 10 minutes) and this morning I just left the house and down to 31% but sky is brighter today. Official Loads Tester did one load in the washer this morning. Heat pump has been running the whole time heating the house. Pretty windy, sustained winds around 20 mph and above. I did turn the heat down slightly yesterday, no one was in the house all day except me for lunch.
I can't stress the importance of a larger bank. I think it is money well spent in most cases. Sun should shine tomorrow and I'll get as much as my array can put out. I doubt I'll get back to 100% SOC in two days but never know. We have 8480W of PV. My opinion is oversize on the battery bank, I like the 6 to 1 ratio of bank to panels. We are not in the house much during the day but do schedule laundry and dishwasher during the day. If we hit 100% SOC and it is sunny the next day I usually see battery charged back to 100% by noon. I actually could use more battery simply because I don't have much for dump loads and I'm not capturing that PV yield in the afternoon. I did size system according what I thought would be necessary for winter.
I'm currently weighing installing a system in my shop, that will be more power draw during the day and might make more sense to have a smaller battery to PV ratio. But I will still need a decent sized bank for several cloudy days in a row unless I decide to use some grid input.
What ratio of PV to battery bank size are you currently running?
I can't stress the importance of a larger bank. I think it is money well spent in most cases. Sun should shine tomorrow and I'll get as much as my array can put out. I doubt I'll get back to 100% SOC in two days but never know. We have 8480W of PV. My opinion is oversize on the battery bank, I like the 6 to 1 ratio of bank to panels. We are not in the house much during the day but do schedule laundry and dishwasher during the day. If we hit 100% SOC and it is sunny the next day I usually see battery charged back to 100% by noon. I actually could use more battery simply because I don't have much for dump loads and I'm not capturing that PV yield in the afternoon. I did size system according what I thought would be necessary for winter.
I'm currently weighing installing a system in my shop, that will be more power draw during the day and might make more sense to have a smaller battery to PV ratio. But I will still need a decent sized bank for several cloudy days in a row unless I decide to use some grid input.
What ratio of PV to battery bank size are you currently running?