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Post by wavesonics on Nov 27, 2018 0:31:58 GMT
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Post by tattoo on Nov 27, 2018 1:25:49 GMT
That's a darn good question.... I bet you can but lets see what the experts say...
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Post by swampmonster on Nov 30, 2018 2:02:06 GMT
VERY first thang is, you do NOT want to employ ANY solid state isolater because THEY ARE TOTALLY UNRELIABLE...You are much better off using a top quality CONSTANT duty solenoid relay...OLD SCHOOL stuff that simply works day after day...They look just like any old school Ford starter relay.
BUT, being lithium, you REALLY need to carefully examine and control the charging profile no matter from what source....Best bet for you is too start with the battery maker and get their suggested charging profiles, where I doubt Renogy can offer you an accurate profile because they don't actually MAKE the batteries they sell, nor the isolater.
Once you are confident you have the best charging profile for your batteries, then you most likely will have to include circuitry and/or means of regulation downstream of your alternator/solenoid to properly charge your particular battery from your alternator.
A battery isolator of ANY type is NOTHING more than an automatic "switch" that will shift alternator output to various batteries, but cannot/willnot control the charging profile.
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Post by playersz28 on Nov 30, 2018 12:25:56 GMT
The Isolator is just 2 high current diodes and designed to stop one battery feeding the other one. The alternator is designed for LA battery tech, not Li. If you really want to charge the Li from the alternator on a regular basis and that's the only power source then you'd have to have an inverter feed a Li charger and accept the losses and current draw associated.
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Post by swampmonster on Dec 3, 2018 1:36:17 GMT
Ok, perhaps.....but a real quality Lithium battery will contain a Battery Monitoring System robust nuff to deal with all you might throw at it....SAFELY.
Lithium battery solar systems are NOT like any other.....They require very specialized charging profiles that only very specialized equipment can provide.
To marry that with solar also requires you start at the panels, thru the controller, all the way to the batteries with Lithium being the driving factor....Lithium is GOOD, but Lithium today is special compared to regular lead/acid....Lithium battery solar is it's own beast....From it's hair to it's claws.
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Post by tattoo on Dec 3, 2018 2:14:23 GMT
Ok, perhaps.....but a real quality Lithium battery will contain a Battery Monitoring System robust nuff to deal with all you might throw at it....SAFELY. Lithium battery solar systems are NOT like any other.....They require very specialized charging profiles that only very specialized equipment can provide. To marry that with solar also requires you start at the panels, thru the controller, all the way to the batteries with Lithium being the driving factor....Lithium is GOOD, but Lithium today is special compared to regular lead/acid....Lithium battery solar is it's own beast....From it's hair to it's claws. Yes sir you are correct, I think the powers to be needs to start a Li thread all of it's own... This is going to be the future and it should be covered by it's self for future reference...
Like you I'm learning a little at a time and when the Li batteries get way cheaper I'll buy some but it will be a while for me.....
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Post by swampmonster on Dec 5, 2018 0:06:09 GMT
Me thinks many folks today that invest in RV lithium batteries are seeking to save space and weight...but where they go wrong is to at the same time attempt to save money.
Presently, there is no way to do all that.
But it won't be long where the tech will be worked out and mass produced nuff to where some version of lithium batts will be the norm in almost all RV's of all sizes.
As it presently stands, the tech is in it's infancy where each maker makes tons of claims but also leave out lots of details....It is after that tech is in our hands where we test and experience it, will both society and the makers move toward a more robust, safe, reliable and cheaper version of what we see today...It IS coming, and coming rather rapidly, but still not near where I would jump into it.
For me, for now...It is Life Line AGM stuff.
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Post by ADAM D on Jan 29, 2019 14:02:36 GMT
You have to use a DC-DC charger, there are several out there in multiple AMP sizes.
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Post by Admin on Feb 4, 2019 16:09:01 GMT
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Post by dianawritesoftravel on Feb 19, 2019 18:57:31 GMT
All of my solar components are Renogy...300 Watts 12 Volts Monocrystalline Solar RV Kit Off-Grid Kit with 30A PWM "Adventurer" LCD Charge Controller, 2000W 12V Pure Sine Wave Solar Inverter 2000 Watt Power Battery Converter with Power Saving Mode, and three 12 volt 100 AH Lithium-Iron Phosphate Batteries.
Although I intend to follow the sun, I live in the Pacific Northwest and I want the ability to charge the batteries from my alternator. When I looked at the Victronenergy BMS through their dealer's website, I wasn't sure which model was appropriate for my system. Do you have a recommendation?
Thank you!
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Post by Admin on Feb 21, 2019 22:14:42 GMT
All of my solar components are Renogy...300 Watts 12 Volts Monocrystalline Solar RV Kit Off-Grid Kit with 30A PWM "Adventurer" LCD Charge Controller, 2000W 12V Pure Sine Wave Solar Inverter 2000 Watt Power Battery Converter with Power Saving Mode, and three 12 volt 100 AH Lithium-Iron Phosphate Batteries. Although I intend to follow the sun, I live in the Pacific Northwest and I want the ability to charge the batteries from my alternator. When I looked at the Victronenergy BMS through their dealer's website, I wasn't sure which model was appropriate for my system. Do you have a recommendation? Thank you! It would probably be best to consult Victron, However we have seen The Victron BMS 12/200 might work. Otherwise this might be possible with a DC to DC Converter. -Renogy Team |
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