justinm001
Solar Addict
- Joined
- Dec 18, 2022
- Messages
- 1,575
My 20kw genset in my RV has a dedicated battery which I replaced with a Optima D31m bluetop. I also removed a huge 240v fan in a squirrel cage and replaced it with 2x80w 12v fans. The genset seems to have a very small alternator and can't handle the load, so I added one of those htrc 20a charger plugged into my house system which is left on all the time to keep the thing topped off. Problem is the generator control panel has weird issues when the charger is running, saying the voltage is like 15.4V and then the temp sensor will show very low like 15 or 40 degrees when its really like 180 degrees. If i turn off the charger all is good but then the voltage drops low because of the fans.
On top of this I decided to wire up my tank and battery heaters up to this battery. I also decided to replace the little charger with a large 100a Powermax charger https://a.co/d/e1KV0Hp How should I program this charger? Just leave it at a specific voltage (what voltage) or put the 3 stage part on?
I believe the battery charge is recommended at 30a. 4 65w tank heater pads (21a) plus the 160w in fans (13a) and it also has another oem radiator 12v fan. Once winters over I'm not sure if I should leave this on or switch to a trickle charger.
The other issue is the fans only come on when the generator is on (using relay) I don't think the fans are strong enough to keep it running so if I ever use the genset I plan on just running for 20 minutes with a 20 minute break but running the fans to cool off then start it back up if needed. I'll program this with Victron to auto start at 20% battery then off at 40% which should be around the 20-30 minute mark.
On top of this I decided to wire up my tank and battery heaters up to this battery. I also decided to replace the little charger with a large 100a Powermax charger https://a.co/d/e1KV0Hp How should I program this charger? Just leave it at a specific voltage (what voltage) or put the 3 stage part on?
I believe the battery charge is recommended at 30a. 4 65w tank heater pads (21a) plus the 160w in fans (13a) and it also has another oem radiator 12v fan. Once winters over I'm not sure if I should leave this on or switch to a trickle charger.
The other issue is the fans only come on when the generator is on (using relay) I don't think the fans are strong enough to keep it running so if I ever use the genset I plan on just running for 20 minutes with a 20 minute break but running the fans to cool off then start it back up if needed. I'll program this with Victron to auto start at 20% battery then off at 40% which should be around the 20-30 minute mark.