Reddit reviews 12V 140 Amp Dual Battery Smart Isolator by KeyLine - VSR - Voltage Sensitive Relay Specially Designed for ATV, UTV, Boats, RV's, Campers 5th Wheels Off Road Vehicles Rhino Polaris Artic Cat ETC
We found 8 Reddit comments about 12V 140 Amp Dual Battery Smart Isolator by KeyLine - VSR - Voltage Sensitive Relay Specially Designed for ATV, UTV, Boats, RV's, Campers 5th Wheels Off Road Vehicles Rhino Polaris Artic Cat ETC. Here are the top ones, ranked by their Reddit score.
ZERO VOLTAGE DROP: Forget the traditional diode relays and so-called "solid state" devices that can rob you of almost 2 amps of output power! The Keyline Dual Battery Isolator is the only unit designed with cutting edge programming to deliver optimum performance - with ZERO sacrifice. This compact battery isolator was built ultra-small (2.6" x 2.6" x 2") to fit almost anywhere! A perfect fit under the hood to get close to your dual batteries.VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. Voltage Sensitive Relay (VSR) cuts in at 13.3 volts and cuts out at 12.8 volts to ensure your primary battery is always charged and ready to start your vehicle. It's like having two separate power sources for each battery while only having one alternator!RUGGED DURABILITY: Unlike other isolators on the market, the KeyLine Automatic 140 Amp Dual Battery Isolator is IP65 Certified. This International Protection rating means that your KeyLine isolator is safe for use even for your off-road needs in dusty, wet and unexpected extreme weather environments. Great for extreme vibration applications as well.EASY-TO-USE: The 140 Amp Dual Battery Smart Isolator comes with mounting plate and hardware. Does not include installation wires. Easy-to-follow directions for the most novice DIYer. What could be easier? **If you need installation wiring, see Dual Battery Kit or ATV/UTV Kit.BUY WITH CONFIDENCE: Every 140 Amp Dual Battery Isolator is backed by an industry leading 12-month warranty. If you are not 100% satisfied with your purchase, simply take advantage of the No Questions Asked, 30-Day Money Back Guarantee!!
I have a 75 amp hour group size 24 flooded lead acid battery. At 37.5 amp hours, 50%, that's 450 watt hours. It was $80 at Sam's. The inverter I have, a Harbor Freight 400/800, is $25, I got it for $20 with a coupon.
You mentioned control switch. I don't have one as I replaced my starter battery with my deep cycle battery. To have two batteries with a switch, consider the amazon voltage sensitive relay, $85.
https://www.amazon.com/gp/aw/d/B00WTAFR84/
What it does is it detects when the alternator has charged the starter battery then it turns on the connection to the house battery. There is no need to find a circuot that is on at the right time to control a big relay.
If you want a 120 volt battery charger you could get from Amazon, $55,
https://www.amazon.com/gp/aw/d/B0009IBJCQ/
It's a 10 amp charger.
$240 for the cheap do it yourself flooded lead acid system. Solar is another $150 or so. The $450 Yeti is similar. Yeti gets you lithium for less weight and easier charging at $600. With solar it's $740.
Is this what you wanted with "site some examples"?
I got one of these. Definitely recommend it.
12V 140 Amp Dual Battery Smart Isolator by KeyLine - VSR - Voltage Sensitive Relay Specially Designed for ATV, UTV, Boats, RV's, Campers 5th Wheels Of https://www.amazon.com/dp/B00WTAFR84/ref=cm_sw_r_cp_apip_mP5zMs7p9Xver
Have you checked out the smart battery isolators? I was looking at 12V 140 Amp Dual Battery Smart Isolator by KeyLine - VSR - Voltage Sensitive Relay Specially Designed for ATV, UTV, Boats, RV's, Campers 5th Wheels Off Road Vehicles Rhino Polaris Artic Cat ETC https://www.amazon.com/dp/B00WTAFR84/ref=cm_sw_r_cp_apa_i_dL5RCb7Y6P1G0
The battery size and solar size is fine.
Save a ton of cash and power using my fridge design linked here:
https://www.reddit.com/r/vandwellers/comments/4efrgd/creating_an_effective_and_ultraefficient/
I've measured it to use about 12-15 AH per day or 0.5-0.63A per hour. Simply change the digital thermostat setting to below freezing to turn it back into a freezer.
Easily replaced by solar though it depends where you are. Even in winter you should at least get around 1A per hour from a 200w panel during daylight hours.
A 10A or 20A version of this EPSOLAR MPPT controller is a good solid choice.
https://www.amazon.com/EPEVER-Charge-Controller-Tracer-Display/dp/B01G41315O/ref=sr_1_3?ie=UTF8&qid=1481751447&sr=8-3&keywords=1210A&th=1
Use one of these to link your domestic battery to the engine:
https://www.amazon.com/Battery-Smart-Isolator-KeyLine-Chargers/dp/B00WTAFR84/ref=sr_1_1?ie=UTF8&qid=1481751516&sr=8-1&keywords=vsr
I don't think so. This is the isolator I have: https://www.amazon.com/KeyLine-Chargers-Battery-Smart-Isolator/dp/B00WTAFR84
3 questions, please bear with me!
​
​
​
Thanks for the help
​
Start the vehicle. Use something along the lines of the below device. It makes it so you can add the vehicle battery into the mix. But you never discharge it to far so it's always able to start the engine.
You also put an alarm on the system like the link below that. Also if your decent with electronics... I'm sure something like a raspberry pi or Arduino could be set up so that it would auto start the vehicle on low voltage and shut it back down when the batteries are charged so you don't even need to get up of your batteries run low.
I haven't tried to build the auto start circuit (I did a quick look and didn't find one) but I'm Pretty sure I could set something up in a few days.... shit.... I don't think you'd even need it to be as complex as needing an RPi. You could set up something with a relay. The relay would deactivate below 12 volts and a simple circuit to not re engage the relay after it hits 14 volts across the battery bank..... and honestly a lot of that is in the battery isolator. So you'd set something up so that when the system disconnects the main battery off the network it starts the vehicle and shuts it off once the batteries are charged.
12V 140 Amp Dual Battery Smart Isolator by KeyLine - VSR - Voltage Sensitive Relay Specially Designed for ATV, UTV, Boats, RV's, Campers 5th Wheels Off Road Vehicles Rhino Polaris Artic Cat ETC https://www.amazon.com/dp/B00WTAFR84/ref=cm_sw_r_cp_api_i_8I-FDbSS89NYW
12V Lead Acid Battery Capacity Meter Voltage Tester Multifunction Voltmeter Battery Capacity Indicator with Low Voltage Alarm Function https://www.amazon.com/dp/B07MXJ64TV/ref=cm_sw_r_cp_api_i_cL-FDbX0F9XWF
No no, I don't think you're misinformed at all, it sounds like you've got a pretty good grasp on things. You could definitely get by without a multi-meter with such a simple setup, I guess I was over complicating things. You probably won't need one for your initial install, only if something isn't working right. I very rarely pull my meter out of the tool bag but, I'm sure glad its where when an issue comes up.
I guess what I was trying to say with all my blathering about golf-carts and hair dryers is that, at least for me, power usage calculations rarely translate very well into the real world. The battery manufacturer rates the capacity under ideal conditions, as does the solar panel manufacturer, and I always plug more shit in than I planned to and end up with dead batteries. But other than that, you sound like you have a pretty good grasp on things.
One thing I might add to the setup is a battery isolator, which will allow you to charge the auxiliary battery from the engine, but you'll still be able to start the van if you kill the auxiliary battery. A cheap and reliable way to keep the battery topped up if its dark out or you need more power than the panel can provide. Something like this https://www.amazon.com/KeyLine-Chargers-ISO-PRO-Battery-Isolator/dp/B00WTAFR84/ref=sr_1_1?ie=UTF8&qid=1474004128&sr=8-1-spons&keywords=battery%2Bisolator&th=1