Balcony PV "powerplants"

Skybird · 09-28-21, 03:42 PM

From my ebike battery I know that the storage capacity is measured in either Wh, or Ah.

1Wh = 1Ah x 1V

My Bosch powerpacks for the bike for example have 500 Wh each, at their output of 36V that means they have 13.9 Ah. If the batteries would have an output of 12V, it would be 41.7 Ah. Its not enough to know how much "load" a battery can hold, you need to also know at what power (V) the consumer is running.

With solar panels, their specs influence how much energy they create at a given sunshine level, and over what time. Obviously this decides how fast the battery creates a charge.

I do not want to go for a solution that feeds into the existing wallmounted circuit. A battery that can support one or two light bulbs or a ventilator directly, occasionally a recharging of powerbanks or mobile devices, and maybe run a refrigerator via cable extension, would be good enough. I am not planning to go eco power here, I want a backup solution as part of my prepping for emergency situations. The threat of blackouts is somethign that in all secrecy is starting to worry even German authorities, it is rumoured. A blackout of just an afternoon, that is one thing. A blackout lasting for several days - that is something very different due to the long lasting aftermath from that: could easily become weeks. Therefore, i have started to check and resupply my supplies of everything, and have increased my stocks of drinking water. I also have gotten sacks of charcoal and wood for my rocket oven, for cooking

Running an electric heater I have ruled out, since I think that is a hopeless task with such batteries. When do you heat? In winter. And what do you not have in winter? Plenty of sunshine.

09-28-21, 03:42 PM	#7
Skybird Soaring Join Date: Sep 2001 Location: the mental asylum named Germany Posts: 42,621 Downloads: 10 Uploads: 0	From my ebike battery I know that the storage capacity is measured in either Wh, or Ah. 1Wh = 1Ah x 1V My Bosch powerpacks for the bike for example have 500 Wh each, at their output of 36V that means they have 13.9 Ah. If the batteries would have an output of 12V, it would be 41.7 Ah. Its not enough to know how much "load" a battery can hold, you need to also know at what power (V) the consumer is running. With solar panels, their specs influence how much energy they create at a given sunshine level, and over what time. Obviously this decides how fast the battery creates a charge. I do not want to go for a solution that feeds into the existing wallmounted circuit. A battery that can support one or two light bulbs or a ventilator directly, occasionally a recharging of powerbanks or mobile devices, and maybe run a refrigerator via cable extension, would be good enough. I am not planning to go eco power here, I want a backup solution as part of my prepping for emergency situations. The threat of blackouts is somethign that in all secrecy is starting to worry even German authorities, it is rumoured. A blackout of just an afternoon, that is one thing. A blackout lasting for several days - that is something very different due to the long lasting aftermath from that: could easily become weeks. Therefore, i have started to check and resupply my supplies of everything, and have increased my stocks of drinking water. I also have gotten sacks of charcoal and wood for my rocket oven, for cooking Running an electric heater I have ruled out, since I think that is a hopeless task with such batteries. When do you heat? In winter. And what do you not have in winter? Plenty of sunshine. __________________ If you feel nuts, consult an expert. Last edited by Skybird; 09-28-21 at 03:50 PM.