Very good idea, just one question, these lifepo4 batteries already have bulit in BMS, under and over charge protection so should in theory be safe to charge with any 12v supply. Why do I need yet another device to regulate charging when there is already one fitted by the manufacturer inside the lifepo4 battery, for this specific purpose?
The BMS does not give the correct voltage it cuts it off. Most chargers in caravans boost charge then switch to lower float voltages, which are not correct for LiFePO4. They will not get fully charged without swapping chargers and could do damage to car etc without correct dcdc chargers.
@@IntrepidIresons What about when charging the battery while driving? How will the car provide the correct charging amperage/voltage? Same question for solar charging if solar panel fitted. Thanks
Yes, I would not run this setup without a battery. Elddis/ Xplore recommend always having a battery anway. Consensus is it helps deal with any sudden requests for power and increases the life of the power unit... Supposedly.
@@IntrepidIresons having a battery i agree however how yours is now set up all 12v goes through battery so that and charger is in constant use. You should have wired where existing charger was wired then on ehu battery and charger are bypassed and 12v works as designed
I stand to be corrected but doesn't the AC PSU always top up the battery. The battery, if you have one, is always live.in the circuit. Right now, if my solar is on and providing enough the shunt shows no power draw from the battery and no AC being used. If not enough power from the solar then the shunt shows no power draw from the battery with power coming from the AC directly.
Your 240v goes to the consumer unit and out to charger if you have no battery all 12v and 240v works . You appear to have not wired direct back to battery through the designed system. It might not do any harm but normally you put new charger in same as old . Its what installers do
I'm new to caravanning....surely this would mean that the Battery will not be charging as you drive to your next destination...only when your on EHU or solar
@@IntrepidIresons ok...how does it do that?....is the negative switched to ground when charging is required? I would be interested to see a video on installing the DCDC converter if you have one.
I'll do one tomorrow, if you're not already if you turn on subs and notifications you should be pinged. But all negatives are joined together, the solar and the battery. I've taken an easy feed from the motor mover negative. Have to remember negatives are always connected, it's the lives that are isolated/ fused. Look out for the video and it'll show tomorrow.
Very good idea, just one question, these lifepo4 batteries already have bulit in BMS, under and over charge protection so should in theory be safe to charge with any 12v supply.
Why do I need yet another device to regulate charging when there is already one fitted by the manufacturer inside the lifepo4 battery, for this specific purpose?
The BMS does not give the correct voltage it cuts it off. Most chargers in caravans boost charge then switch to lower float voltages, which are not correct for LiFePO4. They will not get fully charged without swapping chargers and could do damage to car etc without correct dcdc chargers.
@@IntrepidIresons What about when charging the battery while driving? How will the car provide the correct charging amperage/voltage? Same question for solar charging if solar panel fitted. Thanks
@@galaxyb1103the renogy DCDC MPPT charger I have does it. Look out for my other videos
Does that now mean you have to have a battery as you can use original 12v unit with no battery but still get 12v system working
Yes, I would not run this setup without a battery. Elddis/ Xplore recommend always having a battery anway. Consensus is it helps deal with any sudden requests for power and increases the life of the power unit... Supposedly.
@@IntrepidIresons having a battery i agree however how yours is now set up all 12v goes through battery so that and charger is in constant use.
You should have wired where existing charger was wired then on ehu battery and charger are bypassed and 12v works as designed
I stand to be corrected but doesn't the AC PSU always top up the battery. The battery, if you have one, is always live.in the circuit. Right now, if my solar is on and providing enough the shunt shows no power draw from the battery and no AC being used. If not enough power from the solar then the shunt shows no power draw from the battery with power coming from the AC directly.
Your 240v goes to the consumer unit and out to charger if you have no battery all 12v and 240v works .
You appear to have not wired direct back to battery through the designed system. It might not do any harm but normally you put new charger in same as old . Its what installers do
I ran my caravan on hook-up for years without a battery. No issues whatsoever.
I'm new to caravanning....surely this would mean that the Battery will not be charging as you drive to your next destination...only when your on EHU or solar
@@deanswan6109 it is wired to the dcdc charger that does the charging via that cable rather than directly into the battery that would do damage
@@IntrepidIresons ok...how does it do that?....is the negative switched to ground when charging is required? I would be interested to see a video on installing the DCDC converter if you have one.
I'll do one tomorrow, if you're not already if you turn on subs and notifications you should be pinged. But all negatives are joined together, the solar and the battery. I've taken an easy feed from the motor mover negative. Have to remember negatives are always connected, it's the lives that are isolated/ fused. Look out for the video and it'll show tomorrow.
@@deanswan6109 more detailed explanation is up.