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electrical:solar:gentle_intro [2020/06/24 20:09] frater_secessus [how solar power works] |
electrical:solar:gentle_intro [2021/01/21 13:05] frater_secessus [limitations of solar] |
> "...trying to take the comfort level you had in a house into your mobile life [is] tough to do for a boondocker." -- akrvbob((http://www.cheaprvliving.com/forums/Thread-Too-much-or-too-little-Solar?pid=116253#pid116253)) | > "...trying to take the comfort level you had in a house into your mobile life [is] tough to do for a boondocker." -- akrvbob((http://www.cheaprvliving.com/forums/Thread-Too-much-or-too-little-Solar?pid=116253#pid116253)) |
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The amount of power a solar configuration outputs is [[electrical:solar:output|greatly affected by things like latitude, season, shade, temperature, and even battery voltage]]. | The amount of power a solar configuration outputs is [[electrical:solar:output|greatly affected by things like latitude, season, shade, temperature, and even battery voltage]]. A crude rule of thumb might be meaningful solar harvest is possible only when the sun is throwing well-defined shadows on the ground. |
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Since it looks like magic, beginners tend to worry about [[electrical:solar:status#is_my_solar_working|whether or not their system is working]]. It usually is. | Since it looks like magic, beginners tend to worry about [[electrical:solar:status#is_my_solar_working|whether or not their system is working]]. It usually is. |
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The most beginner tolerant and value-for-money battery bank is two **6v deep cycle flooded((you can/must add water periodically))"golf cart" batteries** [[electrical:12v:parallel_serial|wired in series]] to make 12v. This will provide 200+ Ah (amp-hours) of rated capacity.((100+ Ah of usable capacity)) This bank gives Bill one normal day's use and and about a half/day of of reserve (ie, a day with no charging). A set of golf carts like this will be sufficient for most needs and does well with 200-500W of solar panel. Deep cycle batteries are typically [[electrical:depth_of_discharge|discharged no lower than 50%]] as this is a good usability/lifespan compromise. 50% DoD is about 12.2v for lead-acid chemistries. A [[electrical:12v:lvd|Low Voltage Disconnect]] can help prevent deeper, damaging discharge. | The most beginner tolerant and value-for-money battery bank is two **6v deep cycle flooded((you can/must add water periodically))"golf cart" batteries** [[electrical:12v:parallel_serial|wired in series]] to make 12v. This will provide 200+ Ah (amp-hours) of rated capacity.((100+ Ah of usable capacity)) This bank gives one normal day's use and and about a half/day of of reserve (ie, a day with no charging). A set of golf carts like this will be sufficient for most needs and does well with 200-500W of solar panel. Deep cycle batteries are typically [[electrical:depth_of_discharge|discharged no lower than 50%]] as this is a good usability/lifespan compromise. 50% DoD is about 12.2v for lead-acid chemistries. A [[electrical:12v:lvd|Low Voltage Disconnect]] can help prevent deeper, damaging discharge. |
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Yes, they should be vented. No, not everyone does. | Yes, they should be vented. No, not everyone does. |