I was looking for a way to deal with chronic low voltage issues from the park I have a permanent spot at on a 30 amp power pole. My ideal would be an 'all in one' box that I could plug into the park power pole - and then plug the RV into the box. The box would provide 120 volt / 30 amp power for at most 5 minutes. The hope being that the park voltage would 'recover' before the 5 minutes are up. Being a permanent spot means I have no need for portability of the solution.
Having the components in a box or boxes means that I could easily reuse the solution if I got a newer RV.
I came up with one solution thanks to the replies above. I skipped using solar for charging the batteries as the cost of the solar panels was way too much for my budget.
Prices are based on buying the parts in Canada - so if this seems feasible - my next step would be to source the items out of the USA. (we get 'sort of free' healthcare up here - but get gouged on everything else).
It starts at the park power pole - with a Progressive Industries 30 amp EMS - which is a box that cuts power when incoming voltage drops below 104 volts. It resumes power 2 minutes after the voltage goes back above 104 volts. This box is needed so that the transfer switch will work properly - as a transfer switch will not auto switch when incoming voltage is low. $300
Next is a transfer switch that takes power in from the EMS (The EMS will only allow power out to the transfer switch when the voltage is above 104 volts). When voltage from the EMS drops... because of low or no voltage from the park... - the transfer switch ...switches input power over to an inverter. $125
GoPower Transfer Switch
The 30 amp inverter takes 12 volt DC power from a battery bank and inverts it to 120 volts AC. $1,425 Did I hear your jaw drop to the floor?
The battery bank is composed of at least 2 100 amp hour Li-ion batteries - I can add more batteries if more reserve power time is needed... The tech said one should get 5 minutes of 3,600 watts (which is 120 volts at 30 amps) from 2 batteries. $868 * 2 = $1,736 for 2 batteries Are you whimpering yet?
A battery charger charges the batteries ... when A/C power is coming in from the park pole. $250
Plus taxes and the cost of appropriate cabling to connect everything together.
My plan would be to have all that equipment in one or more sturdy weatherproof boxes located between the park power pole and the RV. A 30 amp RV plug would be at either end - to allow to connect to the park power pole on one end - and the RV on the other end.
All comments / suggestions appreciated...