Size doesn't matter. No in this case it really doesn't. If one were to build a rechargeable battery array for B+ (180V or more) what would be the cheapest/most cost effective batteries to use? I don't mind having to make a switch to charge in parallel and discharge in series.
Switching a bank of batteries from series to parallel could get interesting given that they will all be at slightly different levels of charge.
Nothing like this is impossible, but it doesn't sound very practical on all fronts.
Nothing like this is impossible, but it doesn't sound very practical on all fronts.
How much current / power ?
If 30w is ok the a 12V lead accu + a dc/dc converter :
DC DC Boost Converter 8 32V 12V to ±45V 390V High Voltage ZVS Capacitor Charging | eBay
this combo will use any 12V power and give an adjustable B+ from 90 to 390V
Lead acid such as lawn mower or marine deep cycle batteries are an obvious choice of course but I ran across these new LiPo batteries which look interesting but not sure about charging requirements. With lead acid the cheap car battery charger in the garage can be used. other options will need to consider the purchase or building of a suitable charger.
15 VRLA's of say 3 Ah capacity would cost around £140+ here from a reputable supplier. For the cost and all the hassle you could build a first class mains supply for that.
You can't use a car battery charger on VRLA's though.
You can't use a car battery charger on VRLA's though.
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