Free Economy ShippingProduct Specifications for 12 Volt Low Voltage Disconnect - Adjustable Battery Protection (15 Amp)
| BM Part #: | 1950-222 |
|---|---|
| Voltage: | 12 Volt |
| Length: | 2" |
| Width: | 2" |
| Height: | 1.5" |
| Shipping Weight: | 0.60Lbs (9.6 oz) |
| Warranty: | 5 Year |
| Product Manual: | Download |
- Adjustable cutoff voltage - 7 selectable settings from 11.2V to 12.4V
- 15 Amp continuous load capacity with replaceable automotive fuse
- Protects RV, marine, and solar batteries from damaging over-discharge
- Easy installation with 5.5" pre-attached wire leads - no special tools needed
- 5-year manufacturer warranty - reliable solid-state design
- Automatic reconnect when battery recharges (1V above disconnect setting)
- Ultra-low power draw (0.6mA standby) - won't drain your battery
- Weatherproof epoxy-sealed case for harsh marine and outdoor conditions
Product Description
Stop battery drain before it leaves you stranded.
Dead batteries in your RV or boat aren't just inconvenient—they can permanently damage expensive deep-cycle batteries and leave you without power when you need it most. This adjustable Low Voltage Disconnect (LVD) automatically cuts power to your appliances before your battery discharges too deeply, then restores power once the battery recharges.
How It Works
Simply wire this module between your battery and the appliance you want to protect (lights, inverter, refrigerator, etc.). When your battery voltage drops to your chosen threshold, the LVD disconnects power automatically. Once you recharge the battery—via solar panels, shore power, or your alternator—power automatically reconnects when voltage rises 1V above your selected cutoff point.
Why Choose This Low Voltage Disconnect?
- Adjustable Protection: 7-position switch lets you select the exact voltage that works for your battery type and application (11.2V, 11.4V, 11.6V, 11.8V, 12.0V, 12.2V, or 12.4V cutoff points)
- Manual Override: "Always On" setting bypasses the disconnect when you need it
- Quick Installation: Pre-wired 16-gauge leads mean you just connect and go—no special tools or technical expertise required
- Built to Last: Solid-state circuitry with no moving parts, sealed in protective epoxy, backed by a 5-year warranty
- Safe & Reliable: Includes 15 Amp automotive-style fuse for overload and short-circuit protection
Perfect For These Applications
- RV & Campers: Protect your house battery from parasitic loads when parked or boondocking
- Boats & Marine: Prevent dead batteries from trolling motors, fish finders, and cabin electronics
- Off-Grid Solar Systems: Essential protection for solar battery banks during extended cloudy weather
- Work Vehicles: Enable idle reduction systems without killing your battery overnight
- Emergency Power Backup: Safely manage battery-powered equipment in remote locations
Technical Specifications
- Voltage Range: Works with 12V systems (compatible up to 40V input)
- Current Capacity: 15 Amps continuous DC load
- Disconnect Settings: Selectable from 11.2V to 12.4V (0.2V increments)
- Reconnect Voltage: Approximately 1V above selected disconnect point
- Power Consumption: Just 0.6mA in standby (2.5mA when active)
- Operating Temperature: -40°F to 120°F (-40°C to 50°C)
- Dimensions: 2" x 2" x 1.5" (compact design fits almost anywhere)
- Weight: 3.5 oz
What's Included: Low Voltage Disconnect module with pre-attached wire leads, 15 Amp fuse, and 5-year manufacturer warranty.
🚐 Free Shipping on All Orders - Get your low voltage disconnect delivered to your door at no extra cost. Most orders ship within 1 business day.
Frequently Asked Questions (FAQ)
Q: What voltage should I set my low voltage disconnect to?
A: For most 12V lead-acid and AGM batteries, we recommend setting the disconnect between 11.8V and 12.0V to prevent damage while maximizing usable capacity. For lithium batteries, consult your battery manufacturer's specifications as they typically handle deeper discharges. The 7-position switch makes it easy to adjust based on your specific battery type and how critical your loads are.
Q: How do I install this low voltage disconnect?
A: Installation is straightforward: connect the red wire to the positive (+) side of your battery, and the black wire to the positive terminal of your appliance or load. The appliance's negative wire connects directly to the battery negative as normal. The module goes in-line on the positive side only. Basic wire crimping or soldering skills are helpful, but many customers simply use wire connectors. Always install the included 15A fuse on the battery side for protection.
Q: Will this work with my solar panel system?
A: Yes, this LVD is ideal for off-grid solar installations. It protects your battery bank from over-discharge during cloudy periods or high usage. Install it between your battery and your DC loads (not between the solar panel and battery—your charge controller goes there). When the sun comes back out and your panels recharge the battery, the LVD will automatically reconnect power to your loads.
Q: Can I use this for a 15 amp appliance, or is that too much?
A: This module is rated for 15 amps continuous, so you can safely use it with loads up to that rating. However, for loads that consistently run at or near 15 amps, we recommend choosing a disconnect with higher capacity to provide a safety margin. For most RV and marine applications like LED lights, small inverters, fans, and electronics, this 15A model provides plenty of capacity.
Q: What's the difference between this and a battery isolator?
A: A low voltage disconnect automatically cuts power based on battery voltage to prevent over-discharge, while a battery isolator separates multiple batteries to prevent one from draining another (like keeping your starting battery separate from your house battery). They serve different purposes. If you're worried about draining your battery too low while using appliances, you need an LVD. If you're worried about one battery draining another, you need an isolator.
Cross Reference & Compatibility
- Blue Sea Systems 7635 (m-LVD)
- CZH-LABS F-1000/12V
- Electronics-Salon D-1021
- Newmar LVD 12-30
- Powerwerx Compact LVD Battery Guard
- Victron BatteryProtect BPR000065400
How Does This Compare to Other Low Voltage Disconnects?
| Model | Amperage | Voltage Settings | Warranty | Best For | Typical Price |
|---|---|---|---|---|---|
| This Product (L15C) | 15A | 7 positions (11.2-12.4V) |
5 Years | RV, Marine, Solar | $59.95 |
| Blue Sea 7635 m-LVD | 65A | 4 positions (11.5-12.2V) |
2 Years | Marine, Heavy Loads | ~$140+ |
| Victron BatteryProtect 65A | 65A | Programmable | 5 Years | Premium Solar Systems | ~$120+ |
| Powerwerx Compact LVD | 35A | 2 positions (10.6-12.2V) |
1 Year | Ham Radio, Mobile | ~$90 |
| Generic 10A LVD Modules | 10A | Fixed or 2 positions | 30-90 Days | Light Duty | $25-40 |
💡 The Sweet Spot: This LVD offers the best balance of capacity, adjustability, and warranty protection for typical RV and marine applications—without paying premium prices for features you don't need. Perfect for loads under 15A like LED lighting, small inverters, fans, and electronics.
Customer Reviews
Works reliably for vehicle accessories which I want to remain on when key is turned off, and to automatically disconnect if battery charge drops below set voltage.
Installed this to connect with a Dometic hardwire kit and protect my battery. Simple and easy install. Would be nice to order different gauge sizes to match the gauge of my other wiring.
I'm very happy with this Low Voltage Disconnect. The wide range of cutoff voltages available offers the ideal minimum voltage selection for a variety of battery chemistries as well as deep discharge and starting battery designs. You can choose a higher disconnect voltage so you still have enough power left for more critical uses before recharging such as starting a vehicle.
