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SatPlus Solar 100AH LiFePO4 Caravan Solar Battery

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SatPlus Solar 100AH LiFePO4 Caravan Solar Battery

Are you looking to change over your old lead acid, deep cycle batteries? Have you noticed that they just don't hold charge as well as they used to? Before you pull them out and replace them with the same old technology, consider lithium batteries instead.

Just about every device these days feature a rechargeable lithium battery.  Notice the usage time of the device before it goes flat and yet recharges in a matter of hours to full capacity?  That's the benefit of lithium - full power all the way during discharge and quick recovery time to full charge again.  Furthermore, lithium LiFePO4 batteries provide more than 4 times more cycle times (discharge and recharge) compared to traditional lead acid batteries so life time is increased.

Your lead acid battery, including Gel and AGM should only be discharged to around 60% of its capacity.  This is due to the fact that as the battery capacity decreases, so too does the voltage and bringing the voltage too low will damage the individual cells to the point where they cannot recover.  So, in the case of a 100AH deep cycle battery, full power is available but only for 40% of the rated time.  With LiFePo4 batteries, full power is available for 80% of the rated time.  So, as a general rule, 1 x lithium battery can do the job of 2 x AGM batteries. 

How about weight?   Well, this is the real winner.  Half the weight of a lead acid battery so typically about 27KG for a 100AH lead acid and only 13KG for lithium.  Less weight, better fuel economy.

So how much battery storage should you have?  Well, this depends on your power requirements.  For most scenarios, a single 100AH lithium battery should suffice for long weekend trips.  For those of you who spend a fair amount of time on the road and free camping, we would suggest a single 200AH lithium battery or 2 x single 100AH lithium batteries.  This is a huge amount of storage that will get you through those cloudy days until the sun comes back out and recharges your batteries via your solar panels. 

How much solar do you require on your roof to recharge the batteries?

Industry experts tend to suggest  1/10th of the battery power on the low side of charging up to 1/4 of the battery power on the high side (although this guideline applies more to lead acid and not to lithium which prefers a higher recharge current).  So, if you have a single 100AH lithium battery, based on the 1/10th rule, low level recharge would be 1/10th of 100A = 10A x 14V charge voltage = 140 watts.  On the high side (preferred for lithium) 1/4 of 100A = 25A x 14V charge voltage = 350 watts.  For a 200AH lithium battery, double the above.

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