`See interweb for manufactures site and eBay for details. I have a 95 amp one that I no longer need. Only been used 3 or 4 times at most, runs perfectly. £345.00. They are over £500 on eBay. If you battery is pretty low or zonked out, this thing will bring it back to life very quickly & can also power your caravan or motorhome when connected to a battery.