inputs.text: not really feasible use rv ship due finicky nature charger section unit - unit offers one package 1800 watts modified wave inverter 40 amp charger internal transfer switchwhere strartok unit nice compact represents easy connect use unitafter testing found easily puts 1800 watts actually surpasses reasonable length time battery bank power without overheating issues voltage held reasonably stable 114117 range switched form 800 1500 watts even 1800 without much light dimming dramaits charger section quickly recharges battery shore power available however herein lies rub sensitive shore power really defeats purposeif shore power not least 115 volts not operate even transfer switch not work not even pass electricity unless least 115 voltsall advertising unit lists 110120 vac total range 90135 volts ac reality not operate voltage narrow range 112125 volts ac confirmed extensive testing house voltage denyo gensets denyo made use multiple countries allows adjustment frequency voltage regulation 4565 hertz one hertz increments voltage 95 120 anything 112 charger transfer switch would not operate higher 125 would enter protection mode not operatethe applies cycles range operation intents purposes 60 htz three hertz not feasible campingboon docking traveling form marina marina sea trip even us electricity not stable cases let alone heaven forbid might travel north canada south mexicothis case virtually worthless ship rv travel variable shore power powering genset maintain 115 volts 60 hertz fine charge 34 hours parks allow generateor operatin ok using ups house would ok thats case would probably opt pure sine wave inverter insteadthe jury one folks actual road testing tell think dodod might travel north canada south mexicothis case virtually worthless ship rv travel variable shore power powering genset maintain 115 volts 60 hertz fine charge 34 hours parks allow generateor operatin ok using ups house would ok thats case would probably opt pure sine wave inverter insteadthe jury one folks actual road testing tell think dodo