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Search took 0.00 seconds. Search: Posts Made By: markopolo
Forum: Tweaks, Mods & Projects 08-09-2012, 05:07 PM
Replies: 19
Views: 32,165
Posted By markopolo
Re: Running small Air Conditioner on an inverter

Yes, 25ah (per hour) from panels divided by 8 batteries = 3.125ah (per hour) per individual battery. It just seems low to me. I don't have any experience with 48v systems though.

Yes, the...
Forum: Tweaks, Mods & Projects 08-09-2012, 03:37 PM
Replies: 19
Views: 32,165
Posted By markopolo
Re: Running small Air Conditioner on an inverter

It's clever and you're thinking "outside the box" for sure. I doubt that using roughly the same amount of batteries could yield such dramatically different results in actual use. And you have the...
Forum: Tweaks, Mods & Projects 08-09-2012, 11:24 AM
Replies: 19
Views: 32,165
Posted By markopolo
Re: Running small Air Conditioner on an inverter

I don't think the voltage will go low enough to shut off your inverter. You'll only be using 50% of the battery bank capacity. The wiring and temperature will have an affect. You won't really know...
Forum: Tweaks, Mods & Projects 08-08-2012, 11:54 PM
Replies: 19
Views: 32,165
Posted By markopolo
Re: Running small Air Conditioner on an inverter

Some new data :rock:

There are 4 batteries in my van; 2 house and 2 starting for the diesel engine. I have a marine style multi-battery switch that lets me choose #1. the house battery or #2....
Forum: Tweaks, Mods & Projects 08-08-2012, 08:01 PM
Replies: 19
Views: 32,165
Posted By markopolo
Re: Rear Window Air Conditioner

You are doing that math right. Here's an explanation for anyone who doesn't understand series and parallel battery connections:




...
Forum: Tweaks, Mods & Projects 08-08-2012, 05:58 PM
Replies: 19
Views: 32,165
Posted By markopolo
Re: Rear Window Air Conditioner

The chart shows resting voltages. It illustrates battery capacity. It is unrelated to voltage under a load. Take the load off and the batter voltage (and therefore capacity) will be higher.
The...
Forum: Tweaks, Mods & Projects 08-08-2012, 11:32 AM
Replies: 19
Views: 32,165
Posted By markopolo
Re: Rear Window Air Conditioner

The voltage dipping to 12v during a 43 ah load is to be expected. It will drop even more as the battery capacity decreases. It was a very short test and the voltage bounced back to 12.7v as soon as...
Forum: Tweaks, Mods & Projects 08-07-2012, 05:30 PM
Replies: 19
Views: 32,165
Posted By markopolo
Re: Rear Window Air Conditioner

:thumbup: It can measure up to 400A DC - I just needed to read the selector switch properly :rolleyes:



43.5 amp hr draw today on battery only...........

Inverter shows 450 watts AC,...
Forum: Tweaks, Mods & Projects 08-07-2012, 01:38 PM
Replies: 19
Views: 32,165
Posted By markopolo
Re: Rear Window Air Conditioner

Update - my 1200 to 1800 watts surge guess looks to be way too low based on this guy's testing:

https://www.wind-sun.com/ForumVB/showthread.php?16201-Fedders-5000-BTU-A-C-test&p=122377#post122377...
Forum: Tweaks, Mods & Projects 08-07-2012, 12:45 PM
Replies: 19
Views: 32,165
Posted By markopolo
Re: Rear Window Air Conditioner

For me, running the air conditioner on the inverter is a "no-other-choice" option. I wouldn't want to spend too much money on the project because you are always going to be limited by the size and...
Forum: Tweaks, Mods & Projects 08-06-2012, 10:28 PM
Replies: 19
Views: 32,165
Posted By markopolo
Re: Rear Window Air Conditioner

On batteries only: (van motor not running) The same thing will happen with my system if I try to start it in "Cool" mode. My inverter will beep and shut-off.
If I start the A/C unit in "Fan" mode...
Forum: Tweaks, Mods & Projects 07-20-2012, 12:06 AM
Replies: 19
Views: 32,165
Posted By markopolo
Running small Air Conditioner on an inverter

EDIT: I split the posts below from the Rear Window Air Conditioner topic: https://www.classbforum.com/phpBB2/viewtopic.php?f=12&t=2156
I think it will be easier to follow both topics now :thumbup: ...
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