Can I damage the PRISHDA battery by over discharging it?
No, the PRISHDA has over discharge protection. Once the PRISHDA reaches 10v it switches off to protect itself.

Can I hook an PRISHDA up in series or parallel?
Yes, the PRISHDA is can be connected in series and parallel up to 4 batteries.

Can I damage the PRISHDA by using a high voltage charger?
No, the PRISHDA has protection which prevents you damaging it with a high voltage charge. However no more than 70V DC output charger, normally this chargers are 14.6V, 29.2V, 58.4V, while we set the BMS Withstand Volts 70V.

How long will my PRISHDA battery last?
The PRISHDA can cycle 4-6 times more than what a standard lead acid battery can.

Can the PRISHDA battery start my vehicle?
No, the PRISHDA is a storage battery only. It has no Cold Cranking Amps.

What can I use a Lithium Battery for?

Our Batteries are commonly used for off grid, marine, RV and golf cart applications. You can use our lithium batteries for any application that would normally use a single or multiple lead acid, GEL or AGM batteries.

How do I know what size lithium battery I need?

It’s more about what your priorities are. Our lithium has about twice the useable capacity as a lead acid and AGM batteries. You will get about the same usable amps (time), it would cost less, and it’s about ¼ the weight. Refer to the product pages for dimensions or call us with further questions or custom needs.

What about wet/damp locations?

PRISHDA lithium batteries are sealed so they can be put into locations that might get wet or damp without worry about damaging the battery.

Is a LiFePO4 battery more dangerous than lead acid/AGM?

No, it’s safer than lead acid/AGM. Plus, a Prishda Lithium Battery has built in protection circuits. This prevents a short circuit and has under/over voltage protection. Lead/AGM do not, and flooded lead acid contains sulfuric acid that can spill and harm you, the environment and your equipment. Lithium batteries are sealed and have no liquids and give off no gasses.

As our guarantee states “Every item we sell will give you complete satisfaction”

How safe are Lithium Ion Batteries?

Our LiFePo4 batteries are considered to be safe, non-flammable and non-hazardous by international and federally regulated standards. 

How do I change my batteries to Lithium?

After you take out your old batteries, place our batteries in the same way. You can use the same cables to reconnect into the Lithium Battery.
 

How do I charge a Lithium battery?

Our lithium ion technology uses the latest and most advanced built-in battery protection system to prevent damage to the battery. You may utilize a standard charger for our products, although in some cases a lithium charger may be required to charge the batteries.

How long do they last in terms of years??

If you discharge 80% of the Lithium Battery and then recharge it every day for 6 years, you will still have 80% of usable battery power left. This is a huge increase in lifespan compared to a typical AGM or lead acid battery rated at 300 cycles.

What is the built-in battery protection system and how does it work?

Our internal battery protection system is a high-tech innovative design made to protect the lithium cells. Features Include:

  • Internal Features:
    • Low Voltage Protection Switch  – Automatically disconnects at 8V
    • Over Voltage Protection Switch – Automatically disconnects at 15.6V
    • Short Circuit Protection Switch – Automatically disconnects
    • Reverse Polarity Protection Switch – Automatically disconnects
    • Internal cell balancing   – Automatically balances cells
    • Charge Balancing – Independant balancing for multiple batteries connected in parallel or in series. (This needs an extra master BMS, this why we advise someone who need large battery bank, but its better to choose a large one)
  • What voltage is considered full on an PRISHDA battery?
    8v is considered full. When battery is 100% full charged, the volts will be 14.5-14.6V, but when the moment the charger moved, the volts will drop to 13.8-14V, but this is normal, the LiFePo4 battery chemistry Characteristics decide its dropping. It doesn’t mean any energy less or problem.

Warranty

Consumer rights change from time to time.  So that we are always up to date and the wording is perfectly correct, all warranties are covered under the Australian Consumer Law consumer guarantees.

Quality guarantee

  • 24-36 months quality guarantee
  • 30-days return & refund
  • Free lifetime after-sales service
You must provide us with:
  • Order number
  • A detailed description of the LiFePO4 battery problem, with pictures and videos better
  • Please contact us for more information.
Warranty does not apply to:
  • Improper installation / wiring
  • Artificially damaged intentionally
  • Damaged caused by accident

How much current is drawn from the 12V (or 24V) battery when running an inverter connected to a battery?

The simple answer is- divide the load watts by 10 (20). E.g. For a load of 300 Watts, the current drawn from the battery would be:

300 ÷ 10 = 30 Amps (300 ÷ 20 = 15 Amps)

Notes – It is the actual load watts, not the inverter rating that counts. Therefore, a 1500W inverter with a 500 Watt load would be 50 (25) Amps, not 150 (75) Amps. The same inverter with a 1200 Watt load would draw 120 (60) Amps.

How long will my battery last with an inverter load of 1000 Watts?

​For a more accurate calculation of battery current: Divide load watts by actual battery voltage, this will be in the range 12-14V (24-28V).

Then to allow for inverter efficiency, typically 85%, divide the figure by 0.85. Thus:

For a 300W load at 12V….300 ÷ 12 ÷ 0.85 = 29.4 Amps.

For a 300W load at 14V….300 ÷ 14 ÷ 0.85 = 25.2 Amps.

You can see the simple divide by 10 gives an easy “worst case” guide.

Similarly:

For a 300W load at 24V….300 ÷ 24 ÷ 0.85 = 14.7 Amps.

For a 300W load at 28V….300 ÷ 28 ÷ 0.85 = 12.6 Amps.

You can see the simple divide by 20 gives an easy “worst case” guide.

Note: Figures in brackets are for 24V systems.

Charging Lithium LiFePO4 Batteries with pulse charging, charging devices

Can the charging management system contained inside PRISHDA batteries cope with pulse charging that is typically utilized in smart chargers and solar chargers?

The answer to this interesting question is not a simple yes/no response. The simple response is yes, the batteries can “cope” with pulse charging in the short/medium term, however if a pulse charger is used constantly then there is a longer term impact. Let me elaborate a bit more.

One of the issues with a pulse charger as opposed to a constant voltage/constant current charger, is that the voltage peaks of the pulses are not that well controlled, and are often above the maximum allowed voltage. If a constant voltage charger exceeds the maximum voltage of the batteries, then the internal Battery Management System will simply disconnect and with virtually no longer term impact. However, if a pulse charger regularly exceeded the maximum voltage, then the internal BMS will be constantly disconnecting/reconnecting the cells, and besides that, the internal MOSFET switches can’t always react that quickly so for small fractions of seconds, the cells will be exposed to over voltage situations.

As a result of the above, both the cells and the Battery Management System over time will start to suffer some damage/excessive wear that will affect the overall battery life. Now it is very difficult to estimate the magnitude of this impact in terms of a % of the total battery life, since there are many factors that will determine the overall impact.

Further, any lead acid charger (not just the pulse chargers), typically won’t be able to charge the batteries to 100% State of Charger, because the constant current phase tends to end too soon. This usually only affects the top few % of the state of charge, so it is not a major impact to the battery.

Another potential issue, is when the charger, after reaching a full charge (or at least when the charger determines or thinks the battery is full) and having switched over into the float charge mode, sometimes this will return to the bulk/boost charge phase again. This switch over sequence is usually based on voltage, however some lead acid type chargers have this voltage threshold too low for Lithium batteries. For PRISHDA LiFePO4 batteries, the charger should return to bulk/boost charging around 13.2V, but we have seen lead acid chargers only kicking in around 12.8V which will mean the battery is already down below 30% before the charger properly starts charging again.

So the bottom line is a pulse charger can be used if intended for short/medium term usage, however it is not recommended for long terms usage due to the issues described above.

Charging Lithium LiFePO4 Batteries from Solar Panels

Can PRISHDA LiFePO4 batteries charge from a standard commercial solar module or does it require a special module? And is there a need for a controller?

The battery can be charged from standard commercial solar modules, but it definitely requires a solar charge controller. Now, when it comes to solar charge controllers, our batteries can be charged from most nominal 12V controllers however there are compromises. When it comes to modern solar controllers, there are 2 main characteristics that needs to be considered:

Solar charge conversion type

PWM (Pulse Width Modulation) controllers – Cheaper but less efficient controllers. The PWM controller is in essence a switch that connects a solar array to a battery. The switch is “flicked” ON and OFF as needed (pulse width modulated) to hold the battery voltage at the absorption voltage. The result is that the voltage of the array will be pulled down to near that of the battery. The controllers slowly lower the amount of power applied to the batteries as the batteries get closer and closer to fully charged, but the excess energy is “wasted”.

MPPT (Maximum Power Point Tracking) controllers – More expensive but more efficient controllers. The MPPT controller could be considered to be a “smart DC-DC converter”, i.e. it drops the panel voltage down to the voltage required to charge the battery. The current is increased in the same ratio as the voltage is dropped, just like a conventional step-down DC-DC converter. The “smart” element in the DC-DC converter is the monitoring of the maximum power point of the panel which will vary during the day with the sun strength and angle, panel temperature, shading and panel(s) health. The “smarts” then adjusts the input voltage of the DC-DC converter. This controller makes optimum use of the available energy, and typically provides at least 20% more current into the battery than a comparable size PWM controller.

Battery charge regulation

Just like regular battery chargers, it regulates the current flowing from the solar panel into the battery bank to avoid overcharging the batteries. As with a regular quality battery charger, various battery types are accommodated. The differences come with the different charge profiles that are accommodated by the different charge controllers. The majority of charge controllers have charge profiles for lead acid (Gel, AGM, Flooded) batteries. Only some charge controllers have profiles for Lithium, and in particular LiFePO4 batteries.

PRISHDA’s LiFePO4 batteries can be charged with conventional lead acid charge profiles (due to the built-in Battery Protection system), however an LiFePO4 charge profile have advantages as briefly explained below:

Lead Acid chargers will enter into the Absorption stage earlier than an LiFePO4 charger, thus slowing down the charge rate and taking longer to charge.

When in the Absorption stage, also known as the constant voltage stage, the charger will step down the charge current gradually to maintain a set voltage on the battery. For Lead Acid chargers, this happens in short cycles with short charge pulses followed by a measurement, then another short pulse at the same or lower current and so on, until the charge current reaches between 20-10% of the maximum charge rate (this differs between different chargers), after which the charger assumes the batteries are fully charged and changes over to the float stage. Please note that this pulsating effect is not ideal for LiFePO4 batteries, so in the long run you will get less longevity out of the battery (potentially up to 30%). However, this needs to be considered in the context of these batteries having a very long life, thus this may not be a significant impact. For LiFePO4 profiled chargers, the constant current is not maintained through pulses, it has a more sophisticated mechanism where the current is gradually tapered down and continues this until about 5% of the maximum charge rate is achieved. This allows for a deeper charge that is required to fully charge an LiFePO4 battery, thus the Lead Acid battery charger will not achieve a full state of charger and will typically achieve between 90-95%.

When entering the float charge stage, the Lead Acid charger will provide a small current to the batteries at a lower voltage. This small current is dissipated as heat in Lead Acid batteries, but in LiFePO4 batteries over longer periods of time will slowly break down some of the organic electrolyte. This will have a modest effect on the lifespan of the batteries.

Thus, there are advantages for the lifespan of the batteries to have a proper LiFePO4 charge profile, and if you want to get the full capacity our of the battery, you will need a charge controller with an LiFePO4 profile.

To sum all of this up, yes you can charge our PRISHDA batteries with standard commercial solar panels, but a charge controller will be needed. As for charge controllers, an MPPT charge controller will definitely be the preferred option unless lowering cost is really necessary, and as for MPPT charge controllers, it is preferable to use an MPPT charge controller that can charge the battery with an LiFePO4 profile.​

Can I install this under the bonnet in a car engine bay?

As for installing the battery under the bonnet, the main concern is heat. Our batteries are designed to operate up to 65 degrees C. This would be ok under most conditions, however there may be situations where the ambient temperature gets very hot such as in hot summer conditions and when the engine is working particularly hard, where the temperatures under the bonnet could cause the battery temperature to exceed these tolerances.

Therefore there is no simple answer to this. It would depend significantly on where the second battery tray would be located in your engine bay (i.e. it would make a significant difference if it was close to the front near the radiator with good airflow, vs. tucked away behind the motor at the back), and the conditions that you would run your vehicle under.

Our battery management system does contain a thermal valve that would disconnect the battery should it overheat to protect the battery from excessive damage. However, if the battery is running hot much of its life, it would shorten the battery life.

Therefore, as a basic rule-of-thumb we do not recommend it. However, we do have several customers who do install our batteries in the engine bay but they understand the potential impact. To date, we have not yet had any reported issues. However, if there is evidence that the battery has been operated under excessively hot conditions, then that may void the warranty.

Do I need to upgrade my charger to a LiFePO4 charger for a 12V 200Ah / 100A Continuous discharge Lithium LiFePO4 Battery. I currently have a redarc BMS30 installed?

Our battery management system allows our batteries to be charged with the older BMS30 (that does not have a Lithium profile), however there are a few things you should note:

You should select the AGM charge profile.

Only run the BMS30 in Touring mode, never use the Storage mode.

You will not be able to achieve a true 100% State of Charge, so the charger will probably only charge the battery to around 95% full.

When you put your vehicle in storage and it won’t be used for periods of time, it is recommended not to leave you mains power plugged in. It is better for the life span of the batteries not to have the batteries on float charge without any load drawing from it for long periods of time. Please note there is no detrimental impact to our PRISHDA LiFePO4 batteries if left in a partial state of charge for long periods of time, so you do not need to keep them topped up.

Provided you note the above, you can use the older BMS30 with the PRISHDA 12V LiFePO4 batteries.

Charging Sources:

  • Alternator: Most factory alternators will sufficiently charge our lithium batteries and do not require any changes.
  • Inverter: Most inverters have a battery type switch that can either be selected to AGM for the closest setting to lithium or have a custom voltage setting that can be programmed to optimize your lithium battery.
  • Inverter/Charger: You can set your inverter chargers voltage to charge bulk and absorb between 14.4V and 14.6V. The float should be set to 13.6V.
  • Standard Charger: Our batteries internal BMS allows you to use a standard battery charger, in some cases a standard charger may not fully charge our lithium battery and you may need to purchase a lithium charger to get the full usable capacity from it.
  • Can I use a non-lithium profile charger to charge the battery?
    Yes, the PRISHDA battery can accept charge from non-lithium profile chargers temporarily. However, we don’t recommend charging the battery by Impulse model charger, which it’s most of lead acid battery charger, it can’t charge the battery fully and will damage the battery BMS too.