Reply
 
Thread Tools Display Modes
Old 07-16-2019, 10:08 PM   #1
Senior Member
 
HappyCamperCanada's Avatar
 
Join Date: Jun 2019
Location: Nova Scotia, Canada
Posts: 196
Inverter

I want to run a set of 6 patio lights (40W bulbs), an LED lit palm tree, and charge 2 cell phones off an inverter connected to a 2 90 amp-hour battery bank(180 amp-hour total). What size inverter should I get? 300W or 500W. Or should I be looking at 1000W? Will those items drain my batteries much? Thanks.
__________________

HappyCamperCanada is offline   Reply With Quote
Old 07-16-2019, 10:19 PM   #2
Senior Member
 
Join Date: Apr 2016
Posts: 794
I would at least get the 500 watt Inverter. Look at the specs for stand by current. Thatís how much it takes for the Inverter to be turned on with no load. You might find out that a 1000 watt unit will use less current. Jay
__________________

Jay2504 is offline   Reply With Quote
Old 07-18-2019, 08:39 PM   #3
Senior Member
 
HappyCamperCanada's Avatar
 
Join Date: Jun 2019
Location: Nova Scotia, Canada
Posts: 196
So I bought a 500W inverter today. Gonna try it out next week camping and see how it performs. It connects directly to my two 80 amp-hour deep cycle batteries (wired in parallel) via alligator clamps. I'm going to use it to power my 30w LED palm tree (for a couple of hours per night), six 8w LED patio lights (48w, also for a couple hours per night), and charge 2 cell phones (I read somewhere that a cell phone charging is approx 10w). Anyone have a formula that would calculate how much battery all of that would consume?
__________________
Cheers 🍻
Sean and Tracy
2020 Rockwood Premier 2514g
2015 Dodge Grand Caravan SXT Plus
Nova Scotia, Canada 🇨🇦
HappyCamperCanada is offline   Reply With Quote
Old 07-18-2019, 08:55 PM   #4
2012 Solera
 
Join Date: May 2012
Posts: 1,312
Power in watts is volts X amps. Using you numbers, and assuming the cell phones are also charged for a couple of hours, 30 watts plus 48 watts plus 20 watts (2 cell phones) is 98 watts. At 12 volts, 8.2 amps. Round up for inverter efficiency loss, about 9 amps. Two hours should use a little less than 20 amp-hours.

Inverters have a draw even when supplying no output - best to turn it off when not using the output. Also, I use 12 volt chargers for our cell phones- avoid the inverter losses.
__________________
JLeising
2012 Solera "S"
Calif SF Bay Area
JLeising is offline   Reply With Quote
Old 07-18-2019, 09:06 PM   #5
Senior Member
 
HappyCamperCanada's Avatar
 
Join Date: Jun 2019
Location: Nova Scotia, Canada
Posts: 196
Thanks. What's a 12 volt charger for cell phones?
__________________
Cheers 🍻
Sean and Tracy
2020 Rockwood Premier 2514g
2015 Dodge Grand Caravan SXT Plus
Nova Scotia, Canada 🇨🇦
HappyCamperCanada is offline   Reply With Quote
Old 07-18-2019, 09:19 PM   #6
Senior Member
 
Join Date: Jun 2019
Location: Texas
Posts: 162
Quote:
Originally Posted by HappyCamperCanada View Post
Thanks. What's a 12 volt charger for cell phones?
Hes talking about car chargers that use power ports/cigarette lighters to run off the 12V in the trailer.

I was going to suggest it but wasnt sure how comfortable you would be running 12V wires and adding power ports.
flyerdp is offline   Reply With Quote
Old 07-18-2019, 09:28 PM   #7
Senior Member
 
HappyCamperCanada's Avatar
 
Join Date: Jun 2019
Location: Nova Scotia, Canada
Posts: 196
Sounds like something I could do if I knew what exactly I'd need. Something like these?
Attached Thumbnails
Click image for larger version

Name:	IMG_9328.JPG
Views:	25
Size:	41.0 KB
ID:	210248   Click image for larger version

Name:	IMG_9327.JPG
Views:	27
Size:	73.7 KB
ID:	210249  
__________________
Cheers 🍻
Sean and Tracy
2020 Rockwood Premier 2514g
2015 Dodge Grand Caravan SXT Plus
Nova Scotia, Canada 🇨🇦
HappyCamperCanada is offline   Reply With Quote
Old 07-18-2019, 10:02 PM   #8
Senior Member
 
Join Date: Jun 2019
Location: Texas
Posts: 162
Quote:
Originally Posted by HappyCamperCanada View Post
Sounds like something I could do if I knew what exactly I'd need. Something like these?
I was thinking more like this:

https://www.etrailer.com/12V-Power-A...xoCEAwQAvD_BwE

My camper has USB ports in it but I would not use them to charge a phone personally. My phone has a rapid charger that would not work with the USB port. So what the above link is adds a generic port (cigarette lighter type port) for plugging in the phone charger.

You could of course just use the USB ports you found but you will at some point find that a problem for some things.
flyerdp is offline   Reply With Quote
Old 07-19-2019, 01:23 PM   #9
2012 Solera
 
Join Date: May 2012
Posts: 1,312
What they said. I use devices like this:

https://www.amazon.com/ALCLAP-iPhone...ateway&sr=8-17

Can charge the phones any time - inverter on or off, generator on or off, with or without shore power. Believe available for essentially all phones and tablets.

FYI
__________________
JLeising
2012 Solera "S"
Calif SF Bay Area
JLeising is offline   Reply With Quote
Old 07-19-2019, 01:36 PM   #10
Senior Member
 
Join Date: Jun 2012
Posts: 10,346
I'd ditch the six 40W bulbs and go with LEDs. A 40W LED will pull only about 20% of the current of an 40W incandescent.

Your six 40W'ers are a total of 240W, so pulling about 2 amps at 120VAC. This means about 20 amps at 12VDC, plus losses in the inverter.

Since you shouldn't use more than 50% of your battery, your 2 90 amp-hour batteries (180 amp-hr total) are really only good for 90 amp-hrs. So you'll need to shut off your lights after 90/20 = 4.5 hrs (ignoring the palm tree and charging phones).

Going with six 40W LED's would drop your 12VDC current 20% to about 4 amps. Now you can run them for 90/4 = 22.5 hrs.
__________________
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)

2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
rockfordroo is offline   Reply With Quote
Old 07-19-2019, 01:40 PM   #11
2012 Solera
 
Join Date: May 2012
Posts: 1,312
Quote:
Originally Posted by rockfordroo View Post
I'd ditch the six 40W bulbs and go with LEDs. A 40W LED will pull only about 1/8 to 1/10 the current of an 40W
See the third post (by the OP) above. Believe he has already done this.
__________________
JLeising
2012 Solera "S"
Calif SF Bay Area
JLeising is offline   Reply With Quote
Old 07-19-2019, 01:48 PM   #12
Senior Member
 
Join Date: Jun 2012
Posts: 10,346
Quote:
Originally Posted by JLeising View Post
See the third post (by the OP) above. Believe he has already done this.
Yeah, I missed that he changed his lights. But now he could have used a smaller inverter.
__________________
1988 Coleman Sequoia - popup (1987-2009) - outlasted 3 Dodge Grand Caravans!
2012 Roo19 - hybrid (2012-2015)

2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado 1500 Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10
rockfordroo is offline   Reply With Quote
Old 07-20-2019, 07:29 AM   #13
Senior Member
 
HappyCamperCanada's Avatar
 
Join Date: Jun 2019
Location: Nova Scotia, Canada
Posts: 196
Yep. I switched to 8w led bulbs. I could probably get away with a smaller inverter but I'll keep the 500w in case I need to power more stuff down the road.
__________________
Cheers 🍻
Sean and Tracy
2020 Rockwood Premier 2514g
2015 Dodge Grand Caravan SXT Plus
Nova Scotia, Canada 🇨🇦
HappyCamperCanada is offline   Reply With Quote
Old 07-20-2019, 10:19 AM   #14
Senior Member
 
Join Date: Apr 2014
Location: Gainesville, FL
Posts: 962
Quote:
Originally Posted by HappyCamperCanada View Post
Yep. I switched to 8w led bulbs. I could probably get away with a smaller inverter but I'll keep the 500w in case I need to power more stuff down the road.
Does a 500W inverter itself have a higher load than a 300W inverter, independent of what you power with it?

The LEDs tree and patio lights have a converter to run off 110v. Using an inverter to convert 12VDC to 110VAC, only to convert that back to 12VDC, is inefficient. Are there 12VDC lights available for the same purpose? Would they be more efficient.
__________________
- 2016 Ford F-150 SCrew Lariat 4x2 3.5L Ecoboost, 1700# payload
- 2020 Rockwood 2507S
chriscowles is offline   Reply With Quote
Old 07-20-2019, 12:06 PM   #15
Bob414
 
Join Date: Jan 2019
Location: VA
Posts: 37
Generally Speaking "YES"!

Bob
__________________
2014 Flagstaff 206LTD
2008 Nissan Armada LE 4X4 TV
Amateur Astronomer Golf
Retired Electrical Engineer
Bob414 is offline   Reply With Quote
Old 07-29-2019, 08:15 PM   #16
Senior Member
 
HappyCamperCanada's Avatar
 
Join Date: Jun 2019
Location: Nova Scotia, Canada
Posts: 196
So the first night I ran the patio lights and palm tree off the 500W inverter for about an hour. Used some inside lights, radio, and the outside LED awning lights a bit and checked the batteries the next morning. Still had a 95% charge. Hooked up the 50W solar panel and had 100% in a couple hours. Next night and remaining nights I ran them about an hour to an hour and a half and used inside lights a bit and the furnace for about 45 mins to take the chill out. The lowest the batteries got was 80%. Each day I used the solar panel to recharge batteries back to 100%. Luckily we had lots of sunny days! So I guess I answered my original question somewhat. The only way to know for sure is to try things out. Btw, I used a cigarette lighter USB charger in my tow vehicle to charge cell phones. The inverter has USB charging ports but I didn't bother.
__________________

__________________
Cheers 🍻
Sean and Tracy
2020 Rockwood Premier 2514g
2015 Dodge Grand Caravan SXT Plus
Nova Scotia, Canada 🇨🇦
HappyCamperCanada is offline   Reply With Quote
Reply

Tags
inverter

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 07:26 AM.


×