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electrical:12v:intro [2022/05/11 19:34] frater_secessus [sources of house power] |
electrical:12v:intro [2022/09/13 10:45] frater_secessus [Table] |
- be honest about what you want/need to run and how long you plan to run them | - be honest about what you want/need to run and how long you plan to run them |
- [[https://faroutride.com/van-electrical-sizing/|do the math]], or [[https://faroutride.com/van-electrical-calculator/|use a calculator]] to do it for you | - [[https://faroutride.com/van-electrical-sizing/|do the math]], or [[https://faroutride.com/van-electrical-calculator/|use a calculator]] to do it for you |
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Here are some very general ideas to get you thinking: | Here are some very general ideas to get you thinking: |
* [[electrical:12v:laptop|laptop]] charging | * [[electrical:12v:laptop|laptop]] charging |
* <=100w loads from [[https://amzn.to/3u4Qm1g|small inverters]]. Note that most small, inexpensive inverters are [[electrical:inverter#modified_sine_wave|modified sine wave]] and not appropriate for all [[electrical:12v:loads|loads]]. | * <=100w loads from [[https://amzn.to/3u4Qm1g|small inverters]]. Note that most small, inexpensive inverters are [[electrical:inverter#modified_sine_wave|modified sine wave]] and not appropriate for all [[electrical:12v:loads|loads]]. |
| * very small loads (like a cellphone) might be run off the ciggy/USB port [[https://www.reddit.com/r/urbancarliving/comments/v42jvw/is_it_safe_to_charge_your_phone_in_car_while_its/ib5k2u5/|without the engine running]]. |
* **Easy to run** off a [[lifestyle:faq_solar_generator|portable power pack]]((which you will have to recharge somehow)) | * **Easy to run** off a [[lifestyle:faq_solar_generator|portable power pack]]((which you will have to recharge somehow)) |
* fan | * fan |
===== storing power ===== | ===== storing power ===== |
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Power //production// tends to be heaviest during the day while power //use// tends to be heaviest overnight. This means power needs to be stored when power is abundant so it can be used later. The most common storage for power is in a [[electrical:12v:deep_cycle_battery|deep cycle battery bank]]. | Power //production// tends to be heaviest during the day while power //use// tends to be heaviest overnight. This means power needs to be stored when power is abundant so it can be used later. The most common storage for power is in a [[electrical:12v:deep_cycle_battery|deep cycle battery bank]], aka "house bank", "house battery", or "auxilliary battery".(("leisure battery" for our UK friends)) |
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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\\ no maintenance required | 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 | |
| | [[lifestyle:faq_solar_generator|"solar generators"]] | convenient | relatively expensive\\ non-repairable\\ designed for generic needs, not your specific needs\\ typically slow to charge\\ typically limited solar input limits and performance | |
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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. |