Forum Discussion
wa8yxm
Jan 24, 2015Explorer III
Two ways rv's are wired, this is customized for a trailer w/o a generator
Shore--Main breaker box === lines from branch breakers to assorted loads.
(IE: television, entainerment, Microwave, Water heater, Fridge, Converter, Otlets and air conditioners)
and with an inverter
Shore--Main--Branch breakers to heavy loads (A/C, W/H, Fridge and optionally converter,, and ONE more breaker (big one) to the inverter/charger's AC in terminals)
(shore-Main-Branch to inverter)--INVERTER---Sub panel (NOTE)--Smaller loads like TV/entairment center, Microwave, Outlets
NOTE that the sub panel may be built into the inverter/converter
If you have a generator and auto transfer switch it is the same as above but
Generator to ATS
Shore to ATS
Ats to Main box as above.
Inverters come in 2x2xmany for this discussion
1a: inline, this type (Described above) auto transfers from Shore to inverter, both charges batteries (When shore present) and uses them (when not) it is what I have and love, very good UPS.
2A: Stand alone: you need to provide manual switchign, only uses batteries, you will need independent charger/converter
1B: True sine wave
2B: MSW
Let me give you the list of things that will not work with a true sine wave inverter:
All devices needing more power than it can deliver.
Now,, on the list of things that eitehr will, or may not work properly on an MSW, that of course, starts the list.
And it is a very long list including some coffee pots, electric blanets, clocks and anything with a timer, NIGHT LIGHTS believe it or not.. in shore a long list.
on the other hand they may work fine.. but why risk it.
Shore--Main breaker box === lines from branch breakers to assorted loads.
(IE: television, entainerment, Microwave, Water heater, Fridge, Converter, Otlets and air conditioners)
and with an inverter
Shore--Main--Branch breakers to heavy loads (A/C, W/H, Fridge and optionally converter,, and ONE more breaker (big one) to the inverter/charger's AC in terminals)
(shore-Main-Branch to inverter)--INVERTER---Sub panel (NOTE)--Smaller loads like TV/entairment center, Microwave, Outlets
NOTE that the sub panel may be built into the inverter/converter
If you have a generator and auto transfer switch it is the same as above but
Generator to ATS
Shore to ATS
Ats to Main box as above.
Inverters come in 2x2xmany for this discussion
1a: inline, this type (Described above) auto transfers from Shore to inverter, both charges batteries (When shore present) and uses them (when not) it is what I have and love, very good UPS.
2A: Stand alone: you need to provide manual switchign, only uses batteries, you will need independent charger/converter
1B: True sine wave
2B: MSW
Let me give you the list of things that will not work with a true sine wave inverter:
All devices needing more power than it can deliver.
Now,, on the list of things that eitehr will, or may not work properly on an MSW, that of course, starts the list.
And it is a very long list including some coffee pots, electric blanets, clocks and anything with a timer, NIGHT LIGHTS believe it or not.. in shore a long list.
on the other hand they may work fine.. but why risk it.
About Technical Issues
Having RV issues? Connect with others who have been in your shoes.24,335 PostsLatest Activity: Nov 12, 2025