February 1, 2016

AC electrical consumption when living aboard at the dock...

We occasionally participate in various boating forums. [See our Some Forums We Read sidebar for links...]

Some of those topics may be relevant here, so once in a while we will repost on our blog for reference.

The following may be one of those cases. To accommodate our non-boating blog readers, sometimes we add some {additional information and links} to the original forum post, below. 

Link to original forum post [9-Nov-2015]

Originally Posted by AFKASAP View Post

What size is your boat?
What significant appliances do you have running?
Is it winter or summer where you are?

How much electricity do you use per day while living aboard (Longterm, not weekenders).

I am talking about comfortable living...
An interesting question, AFKASAP.

I'm assuming you are asking only about shore power AC consumption when at a dock full time. We are not often at the dock full time, but sometimes spend weeks at a time during inclement weather in winter.

I generated some numbers by dividing my average electric meter bills by the KWH rates, so the are just estimates, and will be on the high side since I'm not subtracting fees and taxes also included on the bill.

Our worse-case usage is when we run electric heating at the dock in winter.

In winter [currently laying latitude 56N in Wrangell, Alaska, with average temps around freezing] we average about 36 KWH/day.

On our 3 cabin, 2 head 43ft pilothouse ketch with 2 adults this includes running the heating side of one or more of the 3 air conditioners [maintaining an ambient temp of 20°C; 68°F] clothes washer/dryer, multiple laptop computers, water heater, battery charger, etc. Everything for creature comfort. [We've already proved in times past we can live without all the comforts... now-a-days we have nothing to prove...]

This is facilitated with a 50A 220VAC shore power source. [We only use the 30A 110V cord in summer- mainly for hot water and battery charging/equalization during our brief visits to the marina.]

Away from shore power our AC electrical consumption goes down because we use a diesel fired heating system. I don't have direct comparison figures when away from shore power, but can say we get by in winter running our 10kw generator for about 6-12 hours/week [depending upon solar andwind generator contributions] to keep the 900AH battery bank happy, run the 12VDC watermaker, make hot water, and wash/dry loads of laundry, etc.

It might also be interesting for all of us to compare what we pay per KWH. [We have our own electric meters at our slips here... i.e., electricity is not included with slip fees, but water is...]

Following are our hydro-power rates [US$] for Wrangell, Alaska:

Residential: Base monthly rate $8.00
0-300 KWH $.126 per KWH
300 -1200 KWH $.102 per KWH
>1200 KWH $.08 per KWH

I hope this is helpful.


SV Denali Rose

Short on opinions; focused on research, facts & experience [yours and ours...]

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