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| Thread ID: 80592 | 2007-06-28 22:58:00 | battery chargers | tweak'e (69) | PC World Chat |
| Post ID | Timestamp | Content | User | ||
| 564113 | 2007-06-28 22:58:00 | i'm looking for a solution so i can charge/top up vechile batteries when they are away from mains power. so far an inverter + small charger seems to be the easist way. however i read something about a filter being needed ?? the other way i thought of was a SLA solar panel charger that uses PWM so i can use a battery on the inputs instead of the solare cell. however i think i need current regulation on the input side otherwise the charger will cook. anyone know of any that can regulate the input (ie be able to fit 20amp solar cell on a 2amp charger) ? |
tweak'e (69) | ||
| 564114 | 2007-06-29 01:24:00 | Three terminal regulators (7805 etc) make excellent current limiters, the data sheets have the setup for their use. You may need a series pass transistor with it to get 2 amps though, but that would allow the solar cell to be connected straight in series with the current limiter to the battery. Solar cell terminal voltages should be OK for 12v batteries, with enough headroom for the constant current limiter loss. I use a solar cell on my quad battery, it has 100 mA max out so just leave it on. Battery is always fully charged. |
godfather (25) | ||
| 564115 | 2007-06-29 07:24:00 | unfortunatly solar panels don't work at night which is why i'm looking to use a battery in its replacement. a battery to charge up a battery ;) i'll have a look at the current limiter, i havn't used them but i know of them. also there is a variable one to...i think in a 5 pin package. i'm actually suprised noone makes a variable current battery charger, would save buying multiable chargers for al the different sized batteries. |
tweak'e (69) | ||
| 564116 | 2007-06-29 11:53:00 | You could put a light above the solar panel ... Don't laugh, I have been in a board meeting where a director suggested running the company Xmas lights off a solar panel to save power. One of the Bunnings $99 650 Watt 230v generators would be the cheapest option? |
godfather (25) | ||
| 564117 | 2007-06-30 03:08:00 | www.dse.co.nz How about this?:2cents: |
feersumendjinn (64) | ||
| 564118 | 2007-06-30 05:11:00 | www.dse.co.nz How about this?:2cents: Thats what I use for the quad. It maintains batteries, more than charge them. Not enough output. Now explain to tweak'e how you will get it to work at night. |
godfather (25) | ||
| 564119 | 2007-06-30 06:17:00 | also it wil only maintain car battries not recharge them. i have one on the other vechile. a geny is to big, cost heaps to run and proberlly won't run all night, not to mention noise factor. |
tweak'e (69) | ||
| 564120 | 2007-06-30 06:34:00 | A bicycle on a stand coupled to an alternator? Complete with health benefits. |
godfather (25) | ||
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