We have created a battery comparison chart to help you decide what type of batteries you should use. The chart below shows various battery banks using different types of batteries, and give you a estimate of the amount of usable Kwhrs storage you will get. We then look at the cost and number of years the battery should last in daily use. We have taken the lower estimates of years on all batteries, and then look at the cost per Kwhr and cost per Kwhr per year.
All batteries types will last longer if not heavily discharged daily (70-100% discharge). We would advise not designing any system that will very deeply discharge your batteries daily. Most systems should be designed with a number of hours or days of autonomy to cover days when there is less sun, it would be at these times when you drained the battery more, rather than daily.
We hope this chart will be useful to guide people in the choice of the batteries to use.
Please note: Battery prices do fluctuate and these prices are not automatically updated but give a reflection from when the table was created.
|NiFe 400ah 24V bank||400||520||676||90%||608||14,602||14.6||£3,800||£260||25||£10.41|
|NiFe 1000ah 48v bank||1000||1300||1690||90%||1521||73,008||73||£21,000||£287||25||£11.50|
|500ah 24V bank||417||500||650||50%||250||6,000||6||£1,360||£227||8||£28.33|
|838ah 24V bank||698||838||1089||50%||419||10,056||10||£1,630||£162||8||£20.26|
|1000ah 48V bank||833||1000||1300||50%||500||24,000||24||£3,870||£161||8||£20.16|
|Lead Acid monoblocks|
|210ah bank 24V||175||210||273||50%||105||2,520||2.5||£360||£143||4||£35.71|
|420ah bank 24v||350||420||546||50%||210||5,040||5||£720||£143||4||£35.71|
|840ah bank 24v||700||840||1092||50%||420||10,080||10||£1,440||£143||4||£35.71|
|266ah bank 24v||185||222||266||50%||111||2,660||2.7||£720||£271||10||£27.07|
|798ah bank 24v||554||665||798||50%||333||7,980||8||£2,160||£271||10||£27.07|
|1452ah bank 48v||1008||1210||1452||50%||605||29,040||29||£6,840||£236||10||£23.55|
|LG Chem 6.4Kwhr||100%||6400||6.4||£4,150||£648||10||£64.84|
|Salt Water Aquion|
|Aquion S-Line 2Kwhr Stack||100%||2,000||2||£1,045||£523||15||£34.83|
|Aquion 5 x S-Line 10Kwhr||100%||10,000||10||£5,225||£523||15||£34.83|
|Aquion M-Line 25Kwhr||100%||25,000||25||£15,500||£620||15||£41.33|