Q1：How many batteries do I need?
1. If you are upgrading an existing system, you likely have a pretty good understanding of your power requirements.
2. Remember, a single 100AH lithium battery can replace a 200AH lead-acid battery system due to its increased efficiency.
3. A 100AH 12.8V LiFePO4 battery contains 1280wh power. 150w fridge fror 10h, 200w TV for 6h, 600w Coffeemaker for 2h, 1100w Air conditioner for 1.5h.
Q2：Can Lead acid charger charge lithium battery?
1. Generally, Lead Acid battery charger can be used to charge the lithium battery, it is safe without change it. Some controllers and chargers have multiple charging settings which can be switched to lithium battery mode.
2. Due to different cut-off voltage ratings, the lead acid charger can not practical to full charge the liFePO4 battery.
Q3：Can I wire my lead acid battery with lithium battery?
Only total same batteries could be wired together. Their all technical specifications should be perfect match. Including: Rated voltage , rated current, charging voltage, charging current, present state, BMS module, etc. So lead acid battery can not be connected with lithium battery.
Q4：How can I deal with my old batteries?
If you have decided to buy lithium batteries and there are old lead-acid batteries still work. You know they cannot be connected in the same solar system. So we provide you with two suggestions:
1. Divide the new and old batteries into 2 individual solar power systems.
2. The old batteries can be backup power. The premise is it has been fully charged and kept in a safe place. If the old batteries no longer work, you’ll need to find a place to dispose them safely. Since there are hazardous materials used in all types of batteries, you should not just toss them in the trash.
Q5：Will the working temperature affects the battery performance?
The lithium battery is able to work normally in cold (-20°C~0°C) or hot (30°C~60°C) environment. But long term operating in these conditions will harm the reduction to the whole battery.
Q6：How to use the battery in cold weather?
It’s better to find a place at above 0°C for charging or discharging the lithium battery. If it’s necessary to operate the battery in a spot at below 0°C and insulation battery box can be very helpful to maintain battery lifespan.
Q7：How to prevent the overheating damage to lithium battery?
As we know that long term usage at 60°C or higher will cut down the battery cycle times. Before operating the lithium battery, make sure the room ventilation is clear. Mount a little cooling fan beside if necessary.
Q8：How many Codi LiFePO4 batteries could be connected together?
Our BMS can handle a 4 batteries series connection and theoretically no limitation on parallel connection. But usually, our recommendation is up to 4 batteries in parallel. So the maximum battery bank you could mount is a 4 series string, each string wires 4 batteries in parallel.
Q9：What is the difference of series & parallel connection?
1. Battery bank in series: Voltage rating get adding. Amperage keeps as one individual battery rating. E.g Two 12V 100AH batteries in series, battery bank voltage 24v, amperage 100A.
2. Battery bank in parallel: Amperage rating get adding. Voltage keeps as one individual battery rating. E.g Two 12V 100AH batteries in parallel, battery bank voltage 12V, amperage 200A.
Q10：How to charge connected batteries?
Before charging, you need to test and make sure that all batteries are at same voltage state. Different voltage status may cause insufficient capacity issue to the battery bank. It’s better to charge each individual battery to full first, then connect them for next charge.
Q11：Can I use my 100AH lithium battery with a 50AH lithium battery together?
When connected together, a big charging current is practical to the big one, but will harm the cells of the little one.
