3rdof5
Weekender RV’er
Finally camping season!
Posts: 55
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Post by 3rdof5 on May 28, 2021 19:57:12 GMT -5
I still beg to differ with you sir, I saw for a fact that my dual group 27 Enhanced AGM batteries were in fact drawing 50 amps thru my 200 amp shunt from my stock convertor. Not a single group 24 standard flooded deep cycle battery. They were down to 11.7 volts when I started the charge so clearly they were drawing 25 amps each and the convertor handled it fine. The amp draw slowly decreased throughout the charge and a few hours later they were at 13.8 volts drawing less than an amp. I agree the stock convertor may not have the typical 2nd stage charge that the solar charger has, in which it brings the battery up to 14.2 volts for the "bubbling charge" but, it definitely can supply high current to the batteries when they can draw it, which mine are able to and they don't need the 2nd stage high voltage charge. They are not flooded type batteries and do not suffer from the same issues. They have 4 times the recharge speed, assuming the current is available, and my stock convertor supplies it perfectly.
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Post by wireman134 on Jun 1, 2021 20:33:56 GMT -5
You not right 14.2V your "bubbling" charge is too low for bulk charging any lead acid battery. Proper bulk charge for AGM and flooded is 14.7v. Look that up. Wrong again on solar controllers most all are 3 stage: bulk,absorption and finally float not including equalization. Another question I was asked was; I know my converter is also a battery charger so why won’t it bring my discharged batteries back to a full charge? RV converters do provide a charge to your RV house batteries, but only a small portion of the converters amperage rating is used for this. Normally 3 to 5 amps, which are not nearly enough to charge batteries that are discharged. Your shunt is feeding all that 12v load while charging. Your dam slide, water pump etc. You obviously don't have a Progressive Dynamics converter, those are the exception. Draining those C/20 AGM's down to 11.7v is 100% depth of discharge and those wont lat long for you. AGM's should not be discharged below 12,1v or 50% depth.
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Post by bmanfx4 on Apr 11, 2022 7:22:41 GMT -5
50 AMPS IS NOT THE CHARGE CURRENT TO THE BATTERIES IT IS THE TOTAL SUPPLY TO THE BOARD. VOLTAGE IS THE PUSH THAT CHARGES BATTERIES. NO PUSH NO CHARGE. Most stock Converters will kill batteries if you let them. They will never properly fully charge a battery. The push is not there. No stock converter will give a group 24 battery a 50 amp charge current. That would burn up your little dual purpose battery that TT's are supplied with. I am a IBEW electrician and work on solar and UPS SYSTEMS I DO KNOW I'm not sure where you get your information but being an electrician doesn't make you a DC battery charging expert. The WFCO series converter / chargers have a 3 stage battery charging profile that supports lead acid and AGM batteries. When in bulk mode the charger outputs 14.4VDC for up to 4 hours. When 4 hours elapses or the battery is sufficiently charged to bring the voltage up it switches to absorption mode outputting 13.6 VDC. It remains in the absorption cycle for up to 44 hours. When the battery is fully charged it then switches to the float profile (trickle charge) and maintains a 13.2VDC level on the battery. The convertor can absolutely output high amperage, of course it is limited by the model / design and the other 12VDC loads that are in use in the camper. If all 12VDC loads are off and the battery is completely discharged the convertor will output very high current to charge the battery. See the attached document from the manufacturer for more info. WFCO-Theory-of-Operation-v2.pdf (956.33 KB)
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