I'm fairly sure my converter is kaput. It will not charge my 6VX2 Batteries and I want to go to two banks of 6V batteries. I did work for our summer 7 week trip.So how do you size a new converter. We have a 30amp system and want to do much more boondocking. Also I have 400W of solar panels not yet connected with a Victron controller.Any brand recommendations? I think the current one is a Progressive.

What is the amperage of your existing converter? What size wire goes from the converter to the batteries?A 45 amp would normally suffice! With larger wire you could go up.PD 9245 would be my choice.

The RV's 30a has nothing to do with the converter size.The converter size in amps is related to the power output of your generator, measured in VA. A typical converter has 0.7 power factor.If your generator can run 1600w (VA) as its rating, then your input to the converter can be 1120 watts. Typical converter efficiency is 85% so output would be 952 watts. Output is in DC and you want 14.8v for those 6s, so 952/14.8= 64.3 amps. So you can have a 60 amp converter, but not a 75 amper unless you have more of a generator.I like the adjustable voltage you get with the PowerMax LK models so you can also crank it to 16.2v for equalizing the 6s every so often as , eg Trojan recommends. Nobody else makes a converter like that, and check out the price!https://www.boatandrvaccessories.com/products/powermax-pm3-60lk-12-volts-60-amp-power-converter-battery-charger-w-led-lightYou can do all four 6s at once with a 100 amp LK, but you need more like a "3000w" generator to run it. Maybe a 2500.

I should have asked for model of your converter and verify the make.

I'll get the make and model in the morning. I think the nameplate is on the back side of course. But I just bought a boroscope that should help there.My generator is a Champion 3500/4000 that we only had to run once last summer on a hot afternoon in ND. But we only stayed 2 or 3 days in one spot, we will be doing long stays next summer when we go semi-fulltime.

enblethen wrote:What is the amperage of your existing converter? What size wire goes from the converter to the batteries?A 45 amp would normally suffice! With larger wire you could go up.PD 9245 would be my choice.If you are looking at these I will suggest that you look at their new 9200 series Modified Deck MountThese converter/chargers will deliver 14.8 volts during the boost phase of charging,much better for Trojan and others requiring a higher (14.8 VDC) boost or bulk voltage.

Converter kaput need to buy better one. | Good Sam Community

time2roll
Nomad
Dec 02, 2019
45 to 60 amps is fine. I would replace with same rating.

PD92xx or PD92xx-14.8
enblethen
Nomad
Dec 02, 2019
OP:
Haven't seen a reply as to what converter you now have. I suggested the PD9245, but if you have a converter that is mounted below the breakers and fuse panel, I would have to rethink replacement.
ScottG
Nomad
Dec 02, 2019
Another vote for the 60A PDI with Charge Wizzard.
agesilaus
Explorer III
Dec 02, 2019
OK just an interim report: It is an Progressive Dynamics Intell-Power, 9200 I assume. Not sure yet what model it is, I'll have to unbox the boroscope I just got and figure out how to work it with my phone. It has 3 X 25 AMP fuses, all good.

Looks like this

Thanks to everyone for all the posts.
DrewE
Explorer II
Dec 02, 2019
I'd double-check the connections before assuming it's bad. If it is malfunctioning, giving Progresive Dynamics a call in regards to repair/service might be a fruitful exercise; they have better than average support, from what I understand.

One rather obvious thing to check is to make sure the outlet it's plugged into is receiving 120V power.
enblethen
Nomad
Dec 02, 2019
I would test the fuses, do not go by looks.
PD 9200 series is still my choice.

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