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 > How is this for a power system? Solar vs battery balance?

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Geewizard

E. Washington

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Posted: 02/19/19 07:08am Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Compressor fridge? Yes plan to max out the roof with solar.


Nope. I do fine with my existing solar and two 100AH batteries powering my Tundra compressor fridge.


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time2roll

Southern California

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Posted: 02/19/19 08:48am Link  |  Quote  |  Print  |  Notify Moderator

Geewizard wrote:

time2roll wrote:

Compressor fridge? Yes plan to max out the roof with solar.
Nope. I do fine with my existing solar and two 100AH batteries powering my Tundra compressor fridge.
OK how many watts solar and what fridge model is it?


2001 F150 SuperCrew
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Geewizard

E. Washington

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Posted: 02/19/19 08:59am Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Geewizard wrote:

time2roll wrote:

Compressor fridge? Yes plan to max out the roof with solar.
Nope. I do fine with my existing solar and two 100AH batteries powering my Tundra compressor fridge.
OK how many watts solar and what fridge model is it?


I have 220W of solar and it's a Tundra T42 refrigerator. In use since about 2007.

http://www.marinespecialists.com/Tundra/frige.html

Kayteg1

California > Nevada

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Posted: 02/19/19 09:09am Link  |  Quote  |  Print  |  Notify Moderator

I wonder if in E. Washington you need refrigerator at all? [emoticon]
Try to take vacations in south states and park you camper in 120F weather, when side with refrigerator will reach 150-160





crosscheck

Coldstream, BC

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Posted: 02/19/19 09:14am Link  |  Quote  |  Print  |  Notify Moderator

Geewizard wrote:

time2roll wrote:

Geewizard wrote:

time2roll wrote:

Compressor fridge? Yes plan to max out the roof with solar.
Nope. I do fine with my existing solar and two 100AH batteries powering my Tundra compressor fridge.
OK how many watts solar and what fridge model is it?


I have 220W of solar and it's a Tundra T42 refrigerator. In use since about 2007.

http://www.marinespecialists.com/Tundra/frige.html

I owned a NovaKool 7500 fridge/freezer for 5 years dry camping almost exclusively without a generator on 330w solar, 4 6v AGM batteries. No problems. Check out the history on our blog.

Dave


2016 F350 Diesel 4X4 CC SRW SB,
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Some Of Our Fun:http://daveincoldstream.blogspot.ca/

Geewizard

E. Washington

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Posted: 02/19/19 09:15am Link  |  Quote  |  Print  |  Notify Moderator

Kayteg1 wrote:

I wonder if in E. Washington you need refrigerator at all? [emoticon]
Try to take vacations in south states and park you camper in 120F weather, when side with refrigerator will reach 150-160


LOL! No thanks! I only vacation where the temps don't go above 90F.

time2roll

Southern California

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Posted: 02/19/19 09:21am Link  |  Quote  |  Print  |  Notify Moderator

Geewizard wrote:

I have 220W of solar and it's a Tundra T42 refrigerator. In use since about 2007.

http://www.marinespecialists.com/Tundra/frige.html
Yes and the OP's Novacool RFS7501 fridge is almost twice the size. Not that it will use twice the power but still need a bit more and 9% less solar.

I would still plan on going a few more watts. Maybe some portables to tilt to the sun in winter. Max out a TC is not really a huge system. The lithium batteries will harvest more power from solar.

accrete_

Exploring the SW

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Posted: 06/09/19 10:57am Link  |  Quote  |  Print  |  Notify Moderator

Greetings,seems like ages since visiting the forums though we’ve been exploring lots since our retirement. My wife & I currently travel in our TwoVanConvoy consisting of a Chevy Express AWD & Promaster, both nicely converted for full time adventures.

I’m i the research phase of our next rig-build and learning heavily toward a pop up TC & visiting both the Hallmark & Outfitter facilities this week.

In context of the OP our Promaster has 160watts solar & 190ah AGM bank to power our ARB 35qt chest fridge and change our gadgets. As I post we’ve been 100% off grid for 301 days traveling in Nevada, Arizona, New Mexico & currently camping near Pike’s Peak as we make our way to Denver for the visits.

We are always back to 100% charge by mid day even when it is overcast with such a low draw (ave of ~.5ah & have yet to notice bank below 12.4 volts even in winter months)

One thing we will do our best to incorporate is a top loading relatively small 50 to 85 quart compressor fridge rather than a front loading unit due to the greater efficiency.

YMMV
Thom


Exploring the SW
In our TwoVanConvoy
Our adventure blog @ OverlandWith.Us






towpro

Compass PA

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Posted: 06/09/19 07:27pm Link  |  Quote  |  Print  |  Notify Moderator

I would also add more solar. and I am happy with AGM, my built in charger is very close to the voltage my AGM wants to see, Lithium should really have a Different Charger.

I run 180Ah AGM batteries, and 300w of solar. I can watch Satellite TV for 2-3 hours, run fantastic fan, run water pump, refreg on Gas, LED lights and still have plenty of power when we wake up in AM (70%). during the day the North Carolina sun brings that back up to 100% by early afternoon. in middle of summer 200w was enough but with panels on front slop of RV I had to try to face south when parking RV. Once the days got shorter in Sep/Oct we were getting close to not fully recovering, especially of we had much rain that day so I went with 300w. I have room and wiring for one more but never got around to it. Now I live in Central Florida so the requirements have changed, need to run AC more so less off grid camping but the sun is brighter down here so my solar requirements have gone down.

in fact when I store my rig I don't even hook it to electric. in summer its always 100% ready to go, in winter with cover on RV (and battery switch turned off, but solar is wired direct to battery) it keeps RV at 100%


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3 tons

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Posted: 06/15/19 01:17pm Link  |  Quote  |  Print  |  Notify Moderator

I the real world a panels advertised gross wattage will seldom be achieved - for overall averaging purposes I subtract 25% or even more depending on weather conditions (less in the Nevada desert)...Everyone’s experience can vary, so based on my 10yrs with 440w of solar and two 6v GC’s, I would suggest to OP having for more solar and an MPPT type controller to help exploit peak harvest hours while avoiding white knuckle stresses...I agree that Li will greatly reduce recovery times and solar wattage requirements...Li will be my next power supply...

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