I still can't get my override switch to work where you force the battery banks to stay connected. Moving the isolator to the house batteries may help that. Pay attention to if your isolator kicks in and out as it opens/closes the circuit mine did until I added more Ah in the back. Start the van and you will see the Volts jump to 14+, proving that you need that ground wire. No grab a set of jumper cables (or two) and connect from your starter batter or where it grounds back to your house battery ground. So put it on the last battery and it should read whatever your house battery is, fire up the van and you'll see that the voltage isn't for shit because there's not enough ground to let it flow. Imagine you're pushing water instead of electricity.ĭon't put your multimeter up front, put it at the back end with your batteries because it will register that good voltage up front yeah, just not enough amps to get it back there. Those electrons gotta flow in a free loop. You're gonna have to run a new ground cable same gauge back their too and you'll be good to go 100%. I'd almost bet that you ran a new +cable all the way back, but you're just grounding to the frame or similar. Otherwise, you're upgrading that long run to something darned-beefy (read: expensive and possibly needing to re-route it). That way, you can select a B2B rating based on the wiring you already have installed, then fuse for that. So, you should spec your wire and fuses and isolator to 200A given your setup, or more likely, bottleneck the circuit with a B2B charger. You're probably aware that you don't want to drain the bank past half or you'll risk damaging it, but you want to be able to recover from that if an oopsie happens. So, with 4x100Ah batteries, that's 50x4, or 200A of potential pull on that circuit. If so, double check your chassis bond, if not, then backtrack to the isolator, fuses, etc.Īlso mind what u/Latter-Performer-387 said about fuse and wire sizing vs the current that circuit should be expected to carry I'll expand on it:Ĭlassic battery chemistries (lead, AGM, gel) generally pull half the depth-of-discharge Ah in A, and that figure multiplies by the number of batteries in the bank. The check to see if it's making it to your rear batteries would be to remove the positive of this circuit and check it against chassis there. That will complete the circuit, as the starter battery is already bonded to chassis. What could be easier? BUY WITH CONFIDENCE: Every 140 Amp Dual Battery Isolator is backed by an industry leading 12-month warranty.You don't need a negative ran all the way back to starter battery, as long as your house battery negative is bonded to chassis. Easy-to-follow directions for the most novice DIYer. WHAT YOU GET: (1) 140 Amp Voltage Sensitive Relay (VSR) (1) 20 ft red battery cable (1) 2ft black ground battery cable (2) positive brass marine type battery terminals (1) negative brass marine type battery terminal tinned copper lugs & heat shrink cable ties easy-to-follow instructions. Great for extreme vibration applications as well. This International Protection rating means that your KeyLine charger is safe for use even for your off-road needs in dusty, wet and unexpected extreme weather environments. It's like having two separate power sources for each battery while only having one alternator! CERTIFIED SAFE: Unlike other isolators on the market, the KeyLine Automatic 140 Amp Dual Battery Isolator is IP65 Certified. 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. VOLTAGE SENSITIVE RELAY: The KeyLine Automatic 140 Amp Dual Battery Isolator is all you need to charge Two Battery Systems. 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. 140 Amp Dual Battery Isolator by KeyLine Chargers (Iso-Pro140 Pro Dual Battery Kit) Brand: KeyLine Chargers Item Weight: 8 ounces Product Dimensions: 2.6 x 2.6 x 2 inches Item model number: ISO-PRO140 Manufacturer Part Number: ISO-PRO140 Folding: No CAPA Certified: Other Amperage: 140 A Safety Rating: Other Voltage: 12 volts ZERO VOLTAGE DROP: Forget the traditional diode relays and so-called 'solid state' devices that can rob you of almost 2 amps of output voltage! The KeyLine Dual Battery Isolator is the only unit designed with cutting edge programming to deliver optimum performance - with ZERO sacrifice. Item: 253269253398 140 Amp Dual Battery Isolator By KeyLine Chargers (Iso-Pro140 Pro Dual Battery.
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