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electrical:12v:intro [2019/05/07 20:19]
frater_secessus [sources of house power]
electrical:12v:intro [2020/05/14 07:25]
frater_secessus [what you can run in the van]
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   * **House power** (coach power, leisure power) is the (usually 12v) electrical system in the **living area**. ​ It runs fans, lights, etc. It's what we are discussing here.   * **House power** (coach power, leisure power) is the (usually 12v) electrical system in the **living area**. ​ It runs fans, lights, etc. It's what we are discussing here.
-  * [[electrical:​12v:​chassis power|chassis power]] is the electrical system in the vehicle itself. ​  ​Starter,​ alternator, headlights, etc.  ​+  * [[electrical:​12v:​chassis power|chassis power]] is the electrical system in the vehicle itself. ​  ​Starter,​ alternator, headlights, etc.  ​The two are usually separate systems, except when actively [[electrical:​12v:​alternator|charging from the alternator]].((or doing something exotic like [[electrical:​solar:​shallow_cycling|shallow cycling]]))  
 + 
 + 
 + 
 + 
 + 
 +===== what you can run in the van ===== 
 + 
 +Things that are run off house power are called [[electrical:​12v:​loads|loads]]. ​ Unlike a wall socket where you can run pretty much anything you want, using power you make yourself is a series of choices and compromises. ​  Some things are easy to run off off-grid; ​ some things are harder and require more infrastructure,​ planning, and money. Some things are impractical in vans. 
 + 
 +Here are some very general ideas to get you thinking: 
 + 
 +  * **trivial to run** off the [[electrical:​12v:​ports|cigarette lighter port]] //while driving// 
 +     * phone and tablet charging - can also be charged from a [[https://​amzn.to/​2WTMOAm|USB battery pack]]. 
 +     * [[electrical:​12v:​laptop|laptop]] charging 
 +  * **easy/​cheap to run** off a [[lifestyle:​faq_solar_generator|portable power pack]]((which you will have to recharge somehow)) 
 +      * fan 
 +      * CPAP 
 +  * **average loads** - small ($) house power system: ​ Example: ​ 200w of solar and 100Ah of battery.  
 +      * [[food:​refrigeration|12v compressor fridges]] -- they use little power and run intermittently 
 +      * laptop charging/​use if you do it at night 
 +      * [[hvac:​roof_vent|roof vent]] 
 +      * swamp coolers (due to high power fan motors) 
 +      * gaming laptops run off solar during the day 
 +      * 120v refrigerators off [[electrical:​inverter|inverter]] 
 +      * charging e-bikes, etc [[electrical:​solar:​nonessential|during the day]] 
 +  * **harder and more expensive to run** - substantial ($$$) house power system - 400w+ of solar, 200Ah+ of battery 
 +      * gaming laptops at night 
 +      * charging e-bikes, etc at night 
 +  * **difficult and very expensive to run** - $thousands in solar, battery, and alternator charging. 
 +      * heating or cooking with electricity,​ which is why we use propane 
 +      * [[hvac:​solar_ac|air conditioning]],​ which is why [[camping:​snowbirding|we go where it is cooler]] 
 +      * electric [[food:​coffee|coffee makers]], which is why we use propane((see the pattern?))
  
 ===== sources of house power ===== ===== sources of house power =====
 +
 +
 +Most campervans use [[electrical:​solar:​gentle_intro|solar]] combined with another charging source, usually the van's [[electrical:​12v:​alternator|alternator]]. ​  ​[[electrical:​12v:​alt_and_solar|This combination]] can be both cheap and highly effective((Isolators are inexpensive,​ and the combination allows one to run much smaller solar configurations than if one were charging by solar alone))
  
 ^                                           ^ Pro                                                                                                                                           | **Con** ​                                                                                                                                                                                               | ^                                           ^ Pro                                                                                                                                           | **Con** ​                                                                                                                                                                                               |
-| [[electrical:​shore_power|shore power]] ​   | cheapest per watt \\ simple \\ abundant power                                                                                                 | often not available \\ if available you are tied to the outlet by your cord/​adapter \\ campgrounds with outlets are more expensive ​                                                                    | +| [[electrical:​shore_power|shore power]] ​(outlet) ​  | cheapest per watt \\ simple \\ abundant power                                                                                                 | often not available \\ if available you are tied to the outlet by your cord/​adapter \\ campgrounds with outlets are more expensive ​                                                                    | 
-| [[electrical:​solar|solar]] ​               | automatically makes power when the sun shines \\ makes high voltages needed to fully charge lead-acid batteries\\ silent\\ lasts for decades ​ | most expensive per watt \\ can be complex\\ panels are large\\ output drops dramatically when shaded ​                                                                                                  | +| [[electrical:​solar|solar]] ​               | automatically makes power when the sun shines \\ makes high voltages needed to fully charge lead-acid batteries\\ silent\\ lasts for decades ​ | most expensive per watt \\ can be complex\\ panels are large\\ ​[[electrical:​solar:​output|output]] ​drops dramatically ​[[electrical:​solar:​shading|when shaded]]                                                                                                   | 
-| [[electrical:​12v:​alternator|alternator]] ​ | automatically makes power when driving\\ about 1/10th the cost of solar for the same current output ​                                          | relatively low charging voltage((unless b2b)) \\ can result in [[electrical:​12v:​psoc|chronic undercharging]] \\ should not idle to charge \\ most people don't drive enough to fully charge lead-acid ​ |+| [[electrical:​12v:​alternator|alternator]] ​ | automatically makes power when driving\\ about 1/10th the cost of solar for the same current output ​                                          | relatively low charging voltage((unless ​[[electrical:​12v:​b2b|b2b]])) \\ can result in [[electrical:​12v:​psoc|chronic undercharging]] \\ should not idle to charge \\ most people don't drive enough to fully charge lead-acid ​ |
 | [[electrical:​generator|generator]] ​       | can make 1000w+ of 120v \\ can run for days \\ inverter models are quieter ​                                                                   | can be expensive ($1000+) \\ maintenance \\ needs to be stored when not in use\\ noisy \\ not allowed in some areas/​times ​                                                                             | | [[electrical:​generator|generator]] ​       | can make 1000w+ of 120v \\ can run for days \\ inverter models are quieter ​                                                                   | can be expensive ($1000+) \\ maintenance \\ needs to be stored when not in use\\ noisy \\ not allowed in some areas/​times ​                                                                             |
  
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 ^                                                                                  ^ Pro                                                                                                                                                        | **Con** ​                                                                                                                      | ^                                                                                  ^ Pro                                                                                                                                                        | **Con** ​                                                                                                                      |
 | [[electrical:​12v:​deep_cycle_battery#​flooded_lead_acid|Flooded lead-acid]] (FLA)  | cheapest per Ah \\ most tolerant of abuse                                                                                                                  | lowest current throughput \\ maintenance ("​watering"​) required \\ can only use 50% of rated capacity((or longevity suffers)) ​ | | [[electrical:​12v:​deep_cycle_battery#​flooded_lead_acid|Flooded lead-acid]] (FLA)  | cheapest per Ah \\ most tolerant of abuse                                                                                                                  | lowest current throughput \\ maintenance ("​watering"​) required \\ can only use 50% of rated capacity((or longevity suffers)) ​ |
-| [[electrical:​12v:​deep_cycle_battery#​agm|Sealed lead-acid]] (SLA, AGM)            | able to charge/​discharge more current than FLA                                                                                                             ​| more expensive per Ah((~2x the price of FLA)) \\ cannot check or replace electrolyte ​                                         | +| [[electrical:​12v:​deep_cycle_battery#​agm|Sealed lead-acid]] (SLA, AGM)            | able to charge/​discharge more current than FLA\\ no maintenance required ​                                                                                  | more expensive per Ah((~2x the price of FLA)) \\ cannot check or replace electrolyte ​                                         | 
-| [[electrical:​12v:​deep_cycle_battery#​lifepo4|LiFePO4 (LFP) lithium]] ​             | very close to normal 12v ranges \\ available as "​drop-in"​ replacements for lead-acid\\ current throughput \\ can be more deeply discharged than lead-acid ​ | most expensive upfront per Ah\\ cannot be charged in freezing temperatures ​                                                                                              ​+| [[electrical:​12v:​deep_cycle_battery#​lifepo4|LiFePO4 (LFP) lithium]] ​             | very close to normal 12v ranges \\ available as "​drop-in"​ replacements for lead-acid\\ current throughput \\ can be more deeply discharged than lead-acid ​ | most expensive upfront per Ah\\ cannot be charged in freezing temperatures ​                                                   
-| [[electrical:​12v:​deep_cycle_battery#​non-lifepo4_lithium-ion|Non-LFP lithium]] ​   | cheaper than LFP per Ah \\ current throughput ​                                                                                                                    ​| thermal runaway \\ voltage not well-suited for 12v systems ​                                                                   |+| [[electrical:​12v:​deep_cycle_battery#​non-lifepo4_lithium-ion|Non-LFP lithium]] ​   | cheaper than LFP per Ah \\ current throughput ​                                                                                                             | thermal runaway \\ voltage not well-suited for 12v systems ​                                                                   |
  
 The battery bank is sized to meet your [[electrical:​solar:​gentle_intro#​daily_power_needs|daily power needs]] and as well as any extra margin you might like. The battery bank is sized to meet your [[electrical:​solar:​gentle_intro#​daily_power_needs|daily power needs]] and as well as any extra margin you might like.
electrical/12v/intro.txt · Last modified: 2020/05/14 07:26 by frater_secessus