WATTs used in a day….

[dougxn]

I noticed submariner said on a previous thread that on a non work day he is about 1200 Wh/day and well above that for a work day.

I have been calculating a 24 hour cycle with a work day around 3600 Wh/day - is that seem high or is that what others are clocking.

I do have my Webasto running all the time[emoji2371] But R likes it warm! I took some readings on it:

(All bases on average of a couple of tests and not actually running anything for 24 hours)
W/A/Hr/Wh/Ah - over 24 hours
110/8.88/00.08/009.17/00.74 Wabasto Startup - ~3 minutes
038/3.00/24.00/912.00/72.00 Wabasto running
110/8.88/00.17/018.33/01.48 Wabasto shutdown - ~10 minutes

That seems costly, seeing that it is a diesel heater!

My base is like this:
6/0.52/24.00/144.00/12.48 Base

Anyway, I just added some victron electronics to monitor the battery, PV and added the CerboGX to create a way to get a good view. Next week I am hopefully getting a mission 440W solar panel - we’ll see how that works.


Sent from my iPad using Tapatalk

 

[dbsea]

I noticed submariner said on a previous thread that on a non work day he is about 1200 Wh/day and well above that for a work day.

I have been calculating a 24 hour cycle with a work day around 3600 Wh/day - is that seem high or is that what others are clocking.

I do have my Webasto running all the time[emoji2371] But R likes it warm! I took some readings on it:

(All bases on average of a couple of tests and not actually running anything for 24 hours)
W/A/Hr/Wh/Ah - over 24 hours
110/8.88/00.08/009.17/00.74 Wabasto Startup - ~3 minutes
038/3.00/24.00/912.00/72.00 Wabasto running
110/8.88/00.17/018.33/01.48 Wabasto shutdown - ~10 minutes

That seems costly, seeing that it is a diesel heater!

My base is like this:
6/0.52/24.00/144.00/12.48 Base

Anyway, I just added some victron electronics to monitor the battery, PV and added the CerboGX to create a way to get a good view. Next week I am hopefully getting a mission 440W solar panel - we’ll see how that works.


Sent from my iPad using Tapatalk

i'm willing to bet the "costly" part of the webasto is the fan/blower to actually move the heat around. The heater and the controller itself probably aren't using very much. 72ah certainly is a lot, 25% of my usable capacity in my boat...

 

[Cutwater28GG]

Amp draw seems a little high compared with the specs

https://online.flippingbook.com/view/169545/2/

 

[Submariner]

The RT27-OB has a Webasto Airtop 2000-STC. Bigger Ranger Tug's and some Cutwaters may have the Webasto Evo 40 which is a bigger unit over the Airtop.

THere's a startup and stop draw which pulls a lot of amps for a short period of time firing up the heater.
The fan that runs non stop to circulate the air consumes 20 watts with the Airtop 2000 STC as does the fuel pump.
Ran 24x7, that'd be about 40 amp-hours (480 watt-hours).

My base load is 27 watts. Then I add two refrigerators (cabin and cockpit). That's 1,200 watts a day for us.
Heater costs us an extra 20watts/hr. Plus any lights we turn on, watch a little YouTube on TV before bed, and any thing we turn on (radio, water pump, toilet flushes, etc...).

3,600 watt-hour a day seems excessive.