Dear customer, the 100ah lifepo4 battery dimensions:12.95*6.77*8.42inch/329*172*214mm, weight:24.2lb/11kg.

48v max via 4 batteries in series. That is the max. You’d need 2 36v in series to get 72v.

Hi, A single battery all has this function ,BMS will balance the voltage.

Yes, you can connect 6pcs in parallel and no more than 10pcs, or you can connect 3 x 200ah battery in parallel.

You mean the battery drops down to 13.6 when not on a charger ?Resting state 100% charged it will sit around 13.6 .Charge voltage is 14.2-14.6 .I hope this helps.

Charging limit voltage: 14.6V
Over voltage disconnect voltage: 15V
Over voltage reconnect voltage: 14.2V
Equalizer charging voltage: 14V
Float charging voltage:13.8V
Boost charging voltage : 13.8V
Boost reconnect charging voltage : 13.2V
Low voltage disconnect voltage: 10.8V
Low voltage reconnect voltage: 12.4V
Under voltage warning voltage: 11.6V
Under voltage warning reconnect voltage: 12V
Discharging limit voltage: 10.4V
Over discharge disconnect voltage: 10.4V
Over discharge reconnect voltage:11.6V

Hello,Thanks for your question, it is for safety cutoff for low temperatures.
Low temp cut off protection ( Charge )0℃ ± 4℃ (32°F ± 39.2°F).
Low temp cut off protection ( Discharge )-20℃ ± 4℃(-4°F ± 39.2°F ) see less.

Yes it comes with two 8×1.25x16MM hex bolts.

Hi, thanks for your question. Yes, of course, our 100AH battery can handle 300amps for up to 5 seconds.100AH battery low temp cutoff can handle 300amps for up to 20 seconds.

The same : all have low temperature cut-off protection function.

The difference: 100ah weighs only 24.2LB. 100ah Plus weighs 33LB, and the actual current can reach 107ah.100ah consists of 4pcs cells connected in series,100ah plus has 12pcs cells inside, connected 4pcs in series and 3pcs in parallel.

40a or 50a or higher?Answer:Hi, we suggest you can use 40A, Maximum 100A.

Hello,Vatrer deep cycle battery has built-in 100A BMS to protect it from overcharge, over-discharge, over-current, and short circuit with excellent self-discharge rate. With high temp cutting off prevents charging over 167 °F (75°C) and Low temp cutoff protection when charger and discharger.

You can use this charger to charge the battery, but we recommend choosing good quality charger. This can more extend battery life.

Not sure all battery has the same warranty, the four I bought comes with a booklet stating 5 years.

If your solar panel supports lithium battery mode, then you can charge the battery.