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electrical:inverter [2023/04/09 18:24] frater_secessus [Sizing your inverter] |
electrical:inverter [2023/09/25 19:58] frater_secessus [inverter chargers] |
Not all PSW are prohibitively expensive. Bestek makes [[https://amzn.to/3N4YE3S|a 300w PSW for about $50]]. See [[https://www.amazon.com/gp/customer-reviews/R3UKQ7A0GQ196N/ref=cm_cr_dp_d_rvw_ttl?ie=UTF8&ASIN=B07KQ4Q2L5|the top-rated review]] for oscilloscope testing and limitations. | Not all PSW are prohibitively expensive. Bestek makes [[https://amzn.to/3N4YE3S|a 300w PSW for about $50]]. See [[https://www.amazon.com/gp/customer-reviews/R3UKQ7A0GQ196N/ref=cm_cr_dp_d_rvw_ttl?ie=UTF8&ASIN=B07KQ4Q2L5|the top-rated review]] for oscilloscope testing and limitations. |
===== inverter chargers ===== | ===== inverter chargers ===== |
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{{ https://m.media-amazon.com/images/I/61wb7PGYPNL._AC_UL320_.jpg?150}} \\ | {{ https://m.media-amazon.com/images/I/61wb7PGYPNL._AC_UL320_.jpg?150}} \\ |
An //inverter charger// performs several functions: | |
| //Inverter/chargers// are most often found on rigs that are on shore power much of the time and run heavy AC loads |
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| It provides several functions: |
- invert 12v battery power to 120vac | - invert 12v battery power to 120vac |
- pass-through shore power when available | - pass-through shore power when available, with auto-switching |
- some can bond shore and battery power to support heavy 120vac loads | - some can bond shore and battery power to support heavy 120vac loads |
- charge battery banks like a [[electrical:converter|converter]] | - charge battery banks like a [[electrical:converter|converter]] |
| - some also handle solar charging |
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They tend to be [[https://amzn.to/2KMcImw|expensive]], some over $1000. | They tend to be [[https://amzn.to/2KMcImw|expensive]], some over $1000. |
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| Note: the Victron Multiplus line has outputs for maintaining the starter battery: |
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| >> The main DC terminal can supply the full output current. The second output, intended for charging starter battery, is limited to 4A and has a slightly lower output voltage.((https://www.victronenergy.com/upload/documents/Manual-MultiPlus-3k-120V-(firmware-xxxx4xx)-EN.pdf)) |
===== Sizing your inverter ===== | ===== Sizing your inverter ===== |
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You will need to know the largest draws you will need to meet **at the same time**. If your TV is 40w, and your your laptop is 100w you would need (40w + 100w) * 1.10((inverter losses)), or an inverter that can power at least **154w**. | You will need to know the largest draws you will need to meet **at the same time**. If your TV is 40w, and your your laptop is 100w you would need (40w + 100w) * 1.10((inverter losses)), or an inverter that can power at least **154w**. |
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Note that motorized equipment like drills likely have **greater current requirements for startup and for running**. Be sure to measure both startup and running (see below). There are tricks you can use to minimize the start load, like starting a sewing machine at a low-load position((http://www.cheaprvliving.com/forums/Thread-Is-it-possible-to-Boondock-with-an-electric-sewing-machine?pid=165956#pid165956)), or //easing// into the trigger of a variable-speed power tool. | Motorized equipment like drills likely have **greater current requirements for startup and for running**. Be sure to measure both startup and running (see below). There are tricks you can use to minimize the start load, like starting a sewing machine at a low-load position((http://www.cheaprvliving.com/forums/Thread-Is-it-possible-to-Boondock-with-an-electric-sewing-machine?pid=165956#pid165956)), or //easing// into the trigger of a variable-speed power tool. |
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| Note that to **actually power the inverter** without voltage sag or dipping so much into battery capacity you may want need something like a 1:1 ratio of panel:inverter on flooded lead and 1:2 on AGM or lithium.((https://www.solarpaneltalk.com/forum/off-grid-solar/solar-living/15554-how-to-increase-solar-panel-output-amps?p=181738#post181738)) This would mean 400w of solar to run a 400w inverter (dipping into the battery as needed) or 400w of solar for 800w of inverter on AGM/Lithium, which have greater throughput. |
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