What voltage is boost?

Waynefl,

You have an excellent charger IMHO. Not for long-term connection, but perfect for three or four hours. Perhaps longer if the battery is slightly sulfated. You need another charge source for top charging and equalization but my money is on your charger for day in day out charger use.

smkettner wrote:
Dometic says 15.4 max on the fridge control board is where I get my number.
Anything above spec is your risk.

Also chargers do not have a boost because they have no normal. They just charge. It appears your Shu decided the battery needed an equalization or does it go to 16.5 every time?

It has no equalize mode. It does 16.2 to 16.5 on every battery, and on any amp setting. But only when it get to around 95% charged. I can only assume its working correctly.

Golden_HVAC wrote:
Personally, I would rather keep my battery below about 13.8 volts. Anything higher, and it seems to warm the battery case, and I know that can't be good for the battery.

Sounds like a problem to me. My batteries don't get any warmer than ambient while charging even at 15V.

Dometic says 15.4 max on the fridge control board is where I get my number.
Anything above spec is your risk.

Also chargers do not have a boost because they have no normal. They just charge. It appears your Shu decided the battery needed an equalization or does it go to 16.5 every time?

smkettner wrote:
Boost is generally 13.9 to 14.9 volts depending on converter.
Portable charger will just charge. Up to 15.4 is fine.
Closer to 16 volts is equalize and should be done direct on the battery with everything else disconnected.

The Schumacher Corp disagrees, w/ you, and so do I. This charger has not smoked anything.....yet :E

Personally, I would rather keep my battery below about 13.8 volts. Anything higher, and it seems to warm the battery case, and I know that can't be good for the battery.

I mainly use my solar system to charge the batteries. When I would use the generator and inverter/charger, it would start out around 45 amps then fairly soon drop to about 35 amps, and I don't think it ran over 14 volts.

When on shore power, if I used the charger, I would set it to about 30% max amps, or about 21 amps, so that it charged at a slow rate, and did not warm the batteries.

I had 4 golf cart batteries.

Fred.

Boost is generally 13.9 to 14.9 volts depending on converter.
Portable charger will just charge. Up to 15.4 is fine.
Closer to 16 volts is equalize and should be done direct on the battery with everything else disconnected.

No the 1093's temp adjusted voltage based on 14.7 or 14.8 is not too high. Just right for many batteries.

The 1093 does not have a "boost voltage" That term only applies to "
three-stage" converters which have three voltage levels.

The 1093 actually has a charge profile that gets the batteries to 14v and then it "trips" and amps begin to taper.

The voltage continues to rise while the amps taper,not reaching 14.8 till the amps are down to about 5amps or less, which is unusual but it works by keeping the tapering amps higher than they would otherwise be, so it all comes out even with a profile which gets to a set voltage (Absorption Voltage-Vabs) and hold that constant while amps taper from there.

Look at the VEC voltage line compared with its amps line on this ugly graph. (if you can find them :) ) The VEC is with three 35a Vectors doing a total of 105 amps approx, but the 1093 by itself does the same profile at its 40a