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 > What's the Latest Solar Tech?

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naturist

Lynchburg, VA

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Posted: 05/27/20 11:56am Link  |  Quote  |  Print  |  Notify Moderator

ajriding wrote:

The battery is really the big thing in tech that has advanced. Yes, a little risky to mount lithium in camper cause you fear it will catch fire.


There are several lithium battery chemistries in use these days, and the lithium iron phosphate (LiFePo) used for RVs is not the fire hazard chemistry that others are. The risk is imaginary.





Vintage465

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Posted: 05/27/20 01:05pm Link  |  Quote  |  Print  |  Notify Moderator

There is all kinds of tech out there but 2 things don't change....put the controller, mppt or pwm as close to the battery as possible. If running parallel solar, run BIG wire. I have #4 conductor from the combiner to the controller(that is near the battery bank)and #2 from the controller to the battery bank. I have no inverter. Just my opinion


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2013 GMC 2500HD Duramax Denali. 2015 CreekSide 20fq w/450 watts solar and 465 amp/hour of batteries. Retiring in 2021, then look-out road, here we come!

time2roll

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Posted: 05/27/20 03:21pm Link  |  Quote  |  Print  |  Notify Moderator

AFAIK the latest tech is lower prices on panels, MPPT controllers, and lithium batteries.


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BFL13

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Posted: 05/27/20 04:22pm Link  |  Quote  |  Print  |  Notify Moderator

A 2002 TC might have the old style 6300 converter instead of a modern one. If it has a 9100 be sure to get a Charge Wizard for it.


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jshupe

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Posted: 05/27/20 04:50pm Link  |  Quote  |  Print  |  Notify Moderator

naturist wrote:

ajriding wrote:

The battery is really the big thing in tech that has advanced. Yes, a little risky to mount lithium in camper cause you fear it will catch fire.


There are several lithium battery chemistries in use these days, and the lithium iron phosphate (LiFePo) used for RVs is not the fire hazard chemistry that others are. The risk is imaginary.


Exactly. This needs to be reiterated because apparently a lot of people are unaware.

MEXICOWANDERER

las peƱas, michoacan, mexico

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Posted: 05/27/20 05:31pm Link  |  Quote  |  Print  |  Notify Moderator

I look at the point of the IPs origin.

Long Island can get a hell of a lot colder than + 20F

Always necessary this caveat

BurbMan

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Posted: 05/27/20 05:42pm Link  |  Quote  |  Print  |  Notify Moderator

Just bought a 100W Renology Kit. This should be more than enough to keep the battery charged for the use we are planning.


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ajriding

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Posted: 05/27/20 05:43pm Link  |  Quote  |  Print  |  Notify Moderator

I was kidding about the battery fire, but some people worry on this forum about the most minute of things...

Agree, you don't want to just imp by with ever decreasing battery charge. If you have batteries, get solar!
It cost a few hundred up front, but power is free after that, and long-term much cheaper than a generator, gas and the hassles it brings.

You said 30 watt TV. Amps is the critical number, not watts. If you have solar and start the evening off with charged batteries, then TV will not be any problem at all.
I have two GC batts and run a big electric Danfoss compressor fridge/freezer and still have available power, and the fridge should be the biggest power consumption I ever use, though an inverter running something big will be a drain also. If you can get DC powered everything this is more efficient than using the inefficient inverter to turn DC into AC, and everything except lights and heaters will turn that AC back into DC anyway (your TV does).
You laptop will be the only thing that prob does not have a DC way to charge...

Also, with solar, use power early in the day so there is time to recharge before dark, if possible.

jshupe

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Posted: 05/27/20 05:48pm Link  |  Quote  |  Print  |  Notify Moderator

ajriding wrote:

I was kidding about the battery fire, but some people worry on this forum about the most minute of things...


There are very real risks, especially associated with cobalt-containing chemistries such as most used EV batteries. LiFePO4 is benign and probably the safest of any batteries you will find available for RV use today. I think people who put used Tesla cells in their rigs, for instance, are asking for future trouble in all but the most sophisticated builds, which very few people do. By the time you get to a point where you've sufficiently mitigated the risks you might as well have gone with LiFePO4.

I went with a large Victron system and lots of residential panels and LiFePO4 batteries, and don't have to worry about energy management. The same equipment I'm using today was on the market in some variation or another five years ago, with very few differences. Solar tech is not changing that quickly, but costs of the existing technologies are slowly trending downwards.

* This post was edited 05/27/20 06:07pm by jshupe *

KD4UPL

Swoope, VA

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Posted: 05/27/20 07:12pm Link  |  Quote  |  Print  |  Notify Moderator

My hesitation with Lithium batteries isn't based on fire. They also have a minimum temperature they should be exposed too. I'm sure it varies but the ones I've looked at had an absolute minimum temperature that was above what it often gets to on cold winter nights. If my camper is sitting outside all winter that would mean needing to unhook the batteries and bring them inside. With AGM or flooded batteries, as long as they are charged (and the solar will take care of that) there's no reason to unhook them and bring them inside during the winter.

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