| Author | Message | ||
| Jim Wilkerson (Wagwar)
Registered Member Username: Wagwar Post Number: 110 Registered: 12-2009 Posted From: 70.240.145.194 Rating: N/A |
Hi, I have a 24vdc house battery bank connected to my Trace SW4024 inverter and a Sure Power Battery Equalizer/Converter Model 52107. It clearly states on the equalizer that input is nominal 24Vdc and output is 1/2 of input (so should be about 12vdc). I was working on my Aqua-Hot today - which is the recipient of the output from this Sure Power device and I discovered it was getting 16Vdc - 20Vdc! It is the only device connected to this equalizer. I'm sure that I've tested this before and found it to be w/in +-12Vdc. What happened? Is it now defective? Thanks! | ||
| Sean Welsh (Sean)
Registered Member Username: Sean Post Number: 1174 Registered: 1-2003 Posted From: 67.142.130.31  Rating: N/A |
What was the input voltage at the time, and were you measuring with the load connected or disconnected? A really good (high-impedance) voltmeter may show a high voltage with no load connected because the voltage regulation requires a load to work properly. You would not notice this issue with the unit connected as an equalizer, but you can see this happen if the unit is connected as a converter. Connect a low-current load such as a 5w automotive lamp across the output and measure the voltage again. If it is not right around half the input voltage, then, yes, the equalizer is defective. -Sean http://OurOdyssey.BlogSpot.com | ||
| Jim Wilkerson (Wagwar)
Registered Member Username: Wagwar Post Number: 111 Registered: 12-2009 Posted From: 70.240.145.194 Rating: N/A |
Thanks, Sean The input voltage was around 25.6Vdc. There was no load on the equalizer. I believe that it is connected as a converter - although I don't know how it would look connected as an equalizer. Currently, the only device connected seems to be the Aqua-Hot. Wiring is: +24vdc input from the +24Vdc battery connection on Inverter. -24vdc on Eq. from the -24vdc battery connection on inverter. +12vdc to Aqua-Hot, -12vdc at Aqua-Hot to chassis ground. I will test today with a small load. If it is defective, do you have a recommendation for a replacement unit? | ||
| Jim Wilkerson (Wagwar)
Registered Member Username: Wagwar Post Number: 112 Registered: 12-2009 Posted From: 70.240.145.194 Rating: N/A |
Thank you, again, Sean for your generous help, expertise and time. I put a small 12vdc lamp on the circuit and as you predicted, the voltage dropped to 13vdc. I'm assuming the EQ is OK. | ||
| Sean Welsh (Sean)
Registered Member Username: Sean Post Number: 1176 Registered: 1-2003 Posted From: 67.142.130.23 Rating: N/A |
Glad to hear it. If you did have a problem, BTW, my first suggestion would be to call Sure Power and see what they charge for repairs, probably cheaper than a whole replacement. -Sean http://OurOdyssey.BlogSpot.com | ||
| Jim Wilkerson (Wagwar)
Registered Member Username: Wagwar Post Number: 113 Registered: 12-2009 Posted From: 99.109.187.242 Rating: N/A |
Sean, I noticed that the wiring diagram for the Sure Power unit calls for circuit breakers (or fuses?) on the 12vdc lead to the Aqua Hot. Currently, there are none. What kind of breakers/fuses should I install? Should there also be a breaker/fuse on the 24vdc lead from the house batt bank to the Sure Power input? On a related topic, the Trace SW4024 wiring instructions also call for fuses on the 24Vdc cables from the house batt bank. There are no fuses installed on these cables. It appears that they should be on the battery terminals and it looks like both the positive and negative terminals should have fuses. So, same question: What kind of breaker/fuses should I put on this circuit? Thanks again! | ||
| Tom Caffrey (Pvcces)
Registered Member Username: Pvcces Post Number: 1337 Registered: 5-2001 Posted From: 173.126.248.77 Rating: N/A |
Jim, your manuals should have this information. The manufacturer is going to have the best knowledge of what is suitable for your equipment. One of the most confusing aspects of fusing has to do with surge ratings, so give the manual a lot of weight. Good luck. Tom Caffrey |