Lithium Battery Cold Weather Maintenance
Cold Weather Maintenance
You can discharge (take energy out) of the batteries down to a battery core temperature of -4 degrees F.
You can recharge lithium batteries when the core temp of the battery is 32 degrees F or warmer (41 degrees or warmer for Victron batteries. Victron is listed in C, this is 5 Degrees C)
If your batteries have heaters, do not leave the heaters on all night unless you are plugged into shore power, as you will use unneeded energy.
If your batteries have heaters, but there is no way to charge (not plugged into shore power, no generator available, solar panels are covered in snow), turn your heaters off.
If you do not have heaters, your batteries MUST be warmer then 32 degrees F to charge (41 degrees for Victron).
Some battery heater installations do not feature a switch for remote operation. If that is the case, your heaters will turn on and off automatically as temperatures demand. Please keep an eye on your battery state of charge.
If you are not using your trailer / RV etc. for the winter, ensure your batteries are above 80% state of charge, and disconnect the master Negative cable from the batteries. If you have Battle Born heated batteries (BB12100H) disconnect the “heat enabled” wire from the small red button terminal located right beside the positive terminal.
Many customers have main disconnect switches that will cut the power to the batteries, but you should take extra care that they are TRULY disconnected. Often RVs will still have a C02 sensor, backlit stereo, or some other emergency sensor that is bypassing this switch. If you are in doubt, simply disconnect the main positive and negative wires that supply your batteries. After the winter storage time, you should have plenty of charge in the batteries.
With LiFePO4 batteries, we recommend disconnecting all potential power draws from the battery and letting them sit with a full charge, or at least a 50% charge minimum. On a full charge, LiFePO4 batteries have been proven to last at least a year in proper storage conditions with a 2–3% depletion each month. If left at a half charge, the batteries have the potential to not last as long in storage.
Tests indicate that at 0 degrees Fahrenheit, with no insulation, the Battle Born internal heater is on about 30% of the time. With no external charging or loads, it gives approximately 185 hours (7 days) of heat capability before the battery goes into a low voltage disconnect.
If the batteries are stored without a charge, their levels could dip below what the internal Battery Management System, or BMS, can protect over the winter season. If possible, we recommend storing them fully charged in an environment above freezing. Our team recommends not leaving a completely drained battery in that state for an extended amount of time, as it can damage the cells inside. Doing so will void the warranty!
If you do find yourself with batteries that are too cold to charge, you have a couple of options:
Bring the batteries into a warm space or park your vehicle indoors
Run a space heater (use caution) inside your vehicle to warm the batteries up. DO NOT use power from the batteries ie. Your inverter, to power the heater. Run an extension cord from your house to the vehicle and plug the heater into your home.
If your batteries are above 60% state of charge, and you can confirm there is no load on the batteries (verify though your shunted meter, you should see 0.0A / 0W load), you can safely leave your batteries for 90 days without worry.
LEAVING A LITHIUM BATTERY IN A FULLY DISCHARGED STATE WILL VOID YOUR WARRANTY!!!!
When in doubt, remove your batteries and bring them into us to be fully charged and ready for storage. This will take 24-48 hours. TAKE PICTURES OF YOUR SYSTEM BEFORE DISCONNECTING ANY WIRING. We are not liable, nor can we assist with “I forgot where this wire goes”. That is your responsibility.
PRODUCTS & SERVICES AVAILABLE AT BEND BATTERY
20575 Painters Court
BEND, OR 97701
We do not install car batteries.
We do not install customer supplied parts or items purchased through our website. All items for your installation must be purchased through Bend Battery's retail location with guidance by a technician.
Solar & Sprinter Conversions
We have one of the Largest Selections of Victron Energy Products and Blue Sea System Products on the West Coast. Our online website highlights only a small portion of the products available at our brick and mortar location in Bend, Oregon.
We do not install customer supplied parts.
Inverters- Pure/True Sine and Modified Sine wave 500w-10000w
Solar Panels- 90w-365w
Solar Panel Mounting Equipment
Solar Charge Controllers
Dicor Self Leveling Lap Sealant
Roof Top Junction Boxes
MC4 Connectors and combiners, MC4 Inline Fuses
Battery Charge Meters/Monitors
Automatic Charging Relays
AC Circuits, AC Source Selection and Power Distribution
Battery Combiners and Cut Off Switches
Charging and Charge Management
DC and AC Circuit Wiring
DC Power Distribution
And Much, Much More!
Solar Battery Banks
We keep a wide range of batteries in stock for battery banks of all sizes. Please call to check the number in stock and availability. We are able to secure large battery banks on pallets and use a forklift to load onto your form of transport when given notice.
Battle Born LiFePO4 Batteries
Victron Energy LiFePO4 Batteries
Expion360 LiFePO4 Batteries
No matter your battery bank type or configuration, we will have a solution for you.
We have USA made Flooded, AGM and Lithium batteries depending on your needs and budget.
8AWG to 4/O USA made welding cable
Copper, Tin Plated and Heavy Duty Lugs
Anderson Power Products Quick Disconnects
Single, Double and Triple Walled Adhesive Heat Shrink
16 Ton 6-way Hydraulic Crimp Press is used for our Custom Cables. Custom Cables may take 24-48+ hours depending on work load and season. Please email your lengths, cable size, lug hole size and colors (Red, Black) to email@example.com. An invoice will be emailed to you. Once the invoice is paid, we begin the process of custom making your cables. You will receive a phone call when your order is ready for pick up. Custom made cables are not refundable or returnable. Please double check all your lengths and lug hole sizes. It is better to have a cable one inch longer than a perfect fit then having a cable that is useless due to being one inch too short.
We exclusively sell Trojan T-105 6 volt batteries and custom built battery bank connection cables. We do not provide any mechanical or maintenance work on golf carts.
Victron Energy Smart Bluetooth Chargers
Noco Genius Jump Start Packs
Noco Genius Accessories
We have one of the largest stock of Victron Energy and Blue Sea Systems products and accessories on the West Coast.
Battery Boxes - G24, G27, U1, 6 Volt Individual and Dual Boxes
Battery Hold Downs and J-Bolts for a Variety of Vehicles
Anti-Corrosion Spray and Terminal Protectant Spray
Battery Carrying Accessories