smkettner
Posts: 7220
Joined: Mon Aug 09, 2010 10:13 pm
Delivery Date: 26 Feb 2014
Location: Orange County, CA

Re: Inverter to power refrigerator during power outage

Sat Sep 15, 2018 3:14 pm

I only recommend sine wave to run motors or microwave ovens. MSW can damage some electronic controls on coffee makers and electric blankets/pads.
1 bar lost at 21,451 miles, 16 months.
2 bar lost at 35,339 miles, 25 months.
LEAF traded at 45,400 miles for a RAV4-EV
I-Pace on order for end of 2018 delivery

patatewz
Posts: 18
Joined: Tue Dec 01, 2015 8:54 am
Delivery Date: 01 Dec 2015

Re: Inverter to power refrigerator during power outage

Sat Dec 01, 2018 3:10 pm

how we can be sure to bot draw to much current from the 12v system and fry the dc/dc converter? can i use a 0 gauge wire with a 150amp fuse or its to much?

i readed somewhere the dc/dc converter can give 135 amp so whats happe if i try to draw more thant 135amp?

thanks.

GlennD
Forum Supporter
Posts: 1389
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 Jul 2013
Leaf Number: 410357
Location: Anaheim

Re: Inverter to power refrigerator during power outage

Sat Dec 01, 2018 5:37 pm

Figure the inverter is 80% efficient. A 100W inverter fully loaded is going to draw over 100A at 12V. That is close to the Leaf's inverter max rating. You do not get something for nothing. A big inverter draws a lot of 12V current.
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e

ydrape
Posts: 18
Joined: Sat Jul 01, 2017 10:50 am
Delivery Date: 11 May 2017
Leaf Number: 329614
Location: Montréal, Qc

Re: Inverter to power refrigerator during power outage

Sat Dec 01, 2018 6:23 pm

GlennD wrote:Figure the inverter is 80% efficient. A 100W inverter fully loaded is going to draw over 100A at 12V. That is close to the Leaf's inverter max rating. You do not get something for nothing. A big inverter draws a lot of 12V current.

You want to say ~1000 W?
12V X 100A X 0,8 = 960 W
2015 SL Leaf made 03/2015
purchased used May 2017; 12/12 bars
Sts Bat: aHR = 58, SOH = 93% Hx = 89%

patatewz
Posts: 18
Joined: Tue Dec 01, 2015 8:54 am
Delivery Date: 01 Dec 2015

Re: Inverter to power refrigerator during power outage

Sat Dec 01, 2018 9:34 pm

so i need to downgrade my fuse from 150 amp to 100 amp to be safe?

BrockWI
Posts: 700
Joined: Fri Mar 28, 2014 6:28 am
Delivery Date: 28 Mar 2014
Leaf Number: 423875
Location: Green Bay, WI.
Contact: Website

Re: Inverter to power refrigerator during power outage

Sat Dec 01, 2018 9:50 pm

You need to size the fuse according to the wire size. The fuse only protects the battery and in turn the car if something shorts out, it doesn't limit power supplied. You need to explain what you are planning on powering, both the inverter and load.
3 kw solar pv - XW6048 - eight L16's
4 ton GSHP
2003 VW TDI 180k miles - 52 mpg lifetime
evse level 2 - Clipper Creek HSC-40
2013 S model with QC package Mar of 2013
@70k miles - 56.56Ahr - 86 SOH - 82.55 Hx - 245 GID

patatewz
Posts: 18
Joined: Tue Dec 01, 2015 8:54 am
Delivery Date: 01 Dec 2015

Re: Inverter to power refrigerator during power outage

Sat Dec 01, 2018 9:59 pm

ok if i want to use a 5000w amp on my leaf... i think i cant because the dc dc converter have a max draw current at 135 amp?

i dont want fry something... so if i use a 100 amp before my 5000w amplifier the fuse will blow if i suck to much current no?

smkettner
Posts: 7220
Joined: Mon Aug 09, 2010 10:13 pm
Delivery Date: 26 Feb 2014
Location: Orange County, CA

Re: Inverter to power refrigerator during power outage

Sat Dec 01, 2018 10:05 pm

patatewz wrote:ok if i want to use a 5000w amp on my leaf... i think i cant because the dc dc converter have a max draw current at 135 amp?

i dont want fry something... so if i use a 100 amp before my 5000w amplifier the fuse will blow if i suck to much current no?
For 5000 watts I recommend a separate battery as a buffer. 100 amp wire and fuse to connect the two batteries.
1 bar lost at 21,451 miles, 16 months.
2 bar lost at 35,339 miles, 25 months.
LEAF traded at 45,400 miles for a RAV4-EV
I-Pace on order for end of 2018 delivery

patatewz
Posts: 18
Joined: Tue Dec 01, 2015 8:54 am
Delivery Date: 01 Dec 2015

Re: Inverter to power refrigerator during power outage

Sat Dec 01, 2018 10:17 pm

what is the difference in using to batteries in the setup?

if i use only one batteries with a 100 amp fuse, the dc dc converter will be protected from to much draw with the 100 amp fuse?

2 batteries with help in what way? can you explain to me the difference?

GlennD
Forum Supporter
Posts: 1389
Joined: Sun Dec 18, 2011 7:14 pm
Delivery Date: 20 Jul 2013
Leaf Number: 410357
Location: Anaheim

Re: Inverter to power refrigerator during power outage

Tue Dec 04, 2018 8:49 pm

Inverters draws the load plus the inefficiency An oversized inverter will only draw big on motor startup Normally it will loaf but you have to size it for startup currents and size it and the wiring appropriately.
2012 Cayenne Red SL traded for:
2013 Pearl White SL Premium
Traded for a Cirrus White 2014 Mercedes B (totaled)
2016 Urano Gray eGolf SEL w/ drive assist
Loved the VW but it sat too low for my old body
Back to a Cirrus White 2017 B250e

Return to “Off-Topic”