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Author Topic: Battery help  (Read 5490 times)
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Posts: 57

« Reply #15 on: July 16, 2010, 09:51:18 PM »

Let us know what  you  have decided ....
Getting a good configuration can really make a difference for useability and cost.
On the whole, you want to minimise the currents that you are dealing with, because the higher the current, the higher the cost of the equipment.
Batteries are always a stumbling block - even scrap prices can be pretty high.
So ....
my take on this has been to get high capacity second hand batteries (fork lift)
accept that used batteries will be low efficiency (perhaps 30% of useable electricity from the charge)
48v means taking more care than 24v - properly insulated tools, risk of electric shock etc...
be prepared to be able to regularly charge the batteries - poorly charged batteries are useles
have a variety of power sources to keep a constant trickle into the batteries
regularly charge the batteries to full capacity - this can take alot of power!

off grid 4 years: 2.5kw pv,sunny island 5048, 2 mx 60s, proven 2.5 48v, home made charge controller, 1500Ah fork lift batteries, 60 evacuated tube solar heating, vigas 40 kw biomas boiler, 3000l thermal store
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