Q. Can these batteries be used in parallel or series?
A. Yes. You can have up to 4 x 120ah batteries in parallel, and 2 batteries in series. It is important to fully charge each individual battery to 100% prior to connecting in a parallel or series battery bank. To ensure longevity of your battery, and balanced voltages (not just in the cells inside each battery, but in each individual battery pack) you should disconnect each battery from the bank and recharge to 100% individually once every 100 cycles/3 months.
Q. What charger do I use for these batteries?
A. (NB. We are authorised resellers for Redarc, Projecta, Victron, Enerdrive and Ctek, contact us for a quote). The charger I would recommend really depends on what solar panels (watts and voltage) you have (or plan to have) and whether you prefer to have a multi input unit or individual standalone units. The Victron Smart Solar MPPT Solar Controllers are an excellent choice if using solar only to charge your batteries, but are more designed for multiple solar panel set ups. If just using a single panel or blanket, then I would recommend our extensive range of EP Solar Tracer Series MPPT Solar Controllers, available in 10A, 15A 20A or 30A sizes, and come pre-terminated with Anderson Plugs, ready for plug and play connection. These are fully sealed and waterproof, with no moving parts.
If you are looking for a DCDC charger to charge from alternator and solar, then the Enerdrive ePOWER DC2DC+ unit has a 50A output when charging from your alternator, or can handle 600W through the built in MPPT solar controller. It can take a maximum of 35A of solar input using 20Voc panels but can take 12v to to 48V nominal panels, doesn't have a 240v charger.
The Redarc Manager 30 has MPPT, alternator and AC charging in 1 unit. There is no real limit to the solar input, but the unit will only use 520w of solar during charging. Realistically most fixed solar panels will produce around 80% of their max current anyway so you could have up to about 650W plugged in.
Please drop us a line and I will chat with you about the best option for your needs.
Q. Do these batteries have cell balancing?
A. Yes these do have internal cell balancing which is controlled by the BMS. During manufacturing of all brands of LiFePO4 cells you will always get some level of differential impedance even in cells produced in the same manufacturing batch. The BMS monitors the individual impedance and state of each cell of each and ensures each cell obtains the same max voltage during charging.
Q. Do these batteries have a high and low voltage cutout? Or is external protection required?
A. The BMS also controls the very low voltage cutout and disconnects the cells at 10.0V. Likewise, if any cell was to reach 2.5V it would also disconnect the cells to protect them from damage from excess discharge. If you want to protect the cells by disconnecting essential or non-essential loads from the battery at a particular pre-set or adjustable voltage point to maximise the life cycles of the battery (which is highly) advisable. There are a number of options for this. I recommend Enerdrive or Victron units depending on the application and current disconnect requirement (contact us for pricing on these units).
Offroad Living provide a minimum full 12 months Manufacturer’s Warranty on all products we sell from the date original date of purchase (unless otherwise specified in the product listing). In the case of the AllSpark Inverter Generators, this is 12 months or 600 hours, whichever occurs first. We warrant that our goods will be free of faults during this time, are manufactured of an acceptable quality, have been accurately described in the selling advertisements and that spare parts and repair facilities will be available for a reasonable period after sale of this product. These products are made for personal/domestic use only and are not supplied, design or sold as suitable to fit for purpose for Commercial use. This Warranty does not cover normal wear and tear, damage from mis-use, water/moisture ingress, poor maintenance, neglect, natural disasters, war, terrorism or operation of the product in a manner outside of that specified in the user manual. This warranty will be considered void if the user modifies, tampers with or alters the unit in anyway. In the event of a defect and before returning the product for warranty, the buyer must contact Offroad Living first. We will run through a series of trouble shooting and fault finding checks to determine the fault or defect first. We may request photos/videos of the problem be sent to us electronically by email. If it cannot be resolved, we may request the product be returned to us for warranty inspection. If it is a warranty issue we will organise the return portage costs, if it is unclear we may ask that you organise the return of the item, and if it is found to be a warranty issue, we will refund the full postage cost. As part of our “Dead on Arrival” guarantee, should a product be found to be defective or faulty due to manufacturing defects during the first 30 days, we will promptly repair or replace the goods or supply a full refund of the purchase price. This choice is at the Buyer’s discretion during that first 30 days. After the first 30 days, the decision to repair, replace or provide a refund during the warranty period is at the sole discretion of Offroad Living. Any repair or replacement products or parts supplied by Offroad Living will be subject to the remaining time of the original 12 month Warranty period.
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