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--- electrical:inverter [2019/03/13 15:36]
frater_secessus [differences from shore power 120vac]
+++ electrical:inverter [2020/08/02 14:26]
frater_secessus [MSW and electronics]
@@ Line 2: / Line 2: @@
 [[lifestyle:words_of_wisdom|Words of Wisdom]]:  "One can only put so much inverter on so much battery... A lot of people will put a 2KW inverter, or larger,  on a single 12v battery, but this can be compared to a 5 second drag car, which uses 5 gallons of gas to run the 1/4 mile, but then only having a 2 gallon gas tank."  -- sternwake((https://vandwellerforum.com/showthread.php?tid=256&pid=3823#pid3823))
+====== Inverters ======
@@ Line 29: / Line 31: @@
 there is anecdotal evidence that MSW can damage some electronics.  The most commonly repeated stories are Dewalt cordless tool battery chargers and laptop chargers.
+> Rule of thumb: Everything that has electronics and use a power supply or an integrated power supply to lower voltage will be fine [on MSW]. (Radio, charger, Screens etc.) Everything that uses a power motor (often without electronics) will not (hairdryer kitchen appliances etc.)  - WombatCombat2020((https://www.reddit.com/r/vandwellers/comments/i2fs18/power_inverter_wave_question/g04fz04/))
 ====== Pure Sine Wave ======
 PSW inverters are as good as (or better than) than AC mains power.  All AC items will run on a properly sized PSW inverter.
@@ Line 41: / Line 44: @@
+====== inverter chargers ======
+{{ https://m.media-amazon.com/images/I/61wb7PGYPNL._AC_UL320_.jpg?150}} \\
+An //inverter charger// performs several functions:
+  - invert 12v battery power to 120vac
+  - pass-through shore power when available
+  - some can bond shore and battery power to support heavy 120vac loads
+  - charge battery banks like a [[electrical:converter|converter]]
+They tend to be [[https://amzn.to/2KMcImw|expensive]], some over $1000.
 ====== Sizing your inverter ======
 Once you have made your MSW vs. PSW decision the next step is **sizing the inverter** (picking the right capacity).
+Note that to **actually power the inverter** you will 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.
 ===== estimating your needs =====
@@ Line 115: / Line 126: @@
 > The situation gets more complicated when there's a 3-prong 120 VAC plug.  The third prong is a safety ground which is assumed to be tied to a ground rod.
-> You can see that the neutral and ground wires [in shore power] are tied together at the panel.  That works, because the hot is 120 VAC.  You can also see how that is very different than two "half-hot" 60 VAC lines, and how that kind of tie-in would short out one leg of an inverter. \
+> You can see that the neutral and ground wires [in shore power] are tied together at the panel.  That works, because the hot is 120 VAC.  You can also see how that is very different than two "half-hot" 60 VAC lines, and how that kind of tie-in would short out one leg of an inverter.
 > In fact, the situation with an inverter is very similar to [a] 240 VAC circuit... which has 2 120 VAC lines driven 180 degrees out of phase, i.e., "push-pull."((http://thesurvivalpodcast.com/forum/index.php?topic=63891.msg758502#msg758502))

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