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6v batterys

i plan to fit 2 x 125 amp 6volt batts to give me 12 volts by useing 2x125amp 6v batts will my total capacity at 12v be 250 amp or 125amp thanks

Asked by: christopher smith  | 2.37pm, Saturday 14 December

WW says:

At 12V your capacity with be 125Ah. Be aware that, even with a good battery charger or alternator regulator, this will give you only around 60Ah of useable capacity.

Mark Langley  | 9.08PM, Saturday 14 December

125Ahr at 12V
The useable capacity depends on the battery type. If they are deep cycle traction type batteries, they can be more deeply discharged than the 50% of the 'leisure' batteries aften fitted to narrowboats.

Rupert Smedley  | 10.36PM, Saturday 14 December

Most standard alternators will only, even with a deep-cycle battery- give a maximum of 90% charge! and any discharge regularly below 50% will cause damage to the plates. Hence a general guide that you can utilise 50% of the rated capacity. Also, over the life of the battery, effective capacity decrease in the region of 3 to 10% per year as the plates either degrade through sulphation, deposition in the cell cavity or from micro pitting of the plates, hence the general advice never to assume more than 50% of the rated capacity of a battery set! for effective management.

Mark Langley  | 10.46PM, Saturday 14 December

Readers say:

thanks for your advice

christopher smith  | 9.04AM, Sunday 15 December

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