Trojan t-1275 vs Signature series J150 RE
Before winter, I need to get a dedicated flooded house battery, my Northstar AGM-27 has been working hard as both house and engine battery for the last 4 months, and I want to return it to engine star...
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In the case of my Meanwell, there are three sets of transistors pulled tightly to the aluminum casing. 2 of these sets are in a depression in the side of the case, which required a lot of effort with a grinder and file to get them to fit tightly so that minimal thermal transfer epoxy was required to bridge the gap and hold them in place.
I only added the heatsinks over the areas right where the transistors meet the casing, and they certainly reduce the temperatures of the casing adjacent to them, significantly. I used Aluminum screen framing to raise the casing off my cabinet door about 3/8 inches, and to also act as strain relief for the 120vac input and DC output cables.
While without any additional fans or heatsinks the loud 40MM fan would cycle on and off at just 6 amps output, my 2 extra fans increased this to about the 24 amp level. With the heatsinks added this rose to ~34 amps, but ambient temperatures play a big factor.
Overall it is an impressive 40 amp charger and I have full confidence in its abilities.
Which is not to say I will not further increase heat dissipation abilities. It still gets hot when maxed out at 40 amps, but not nearly as hot as it did before increasing ventilation and heatsinking.
Thanks again for making us aware of these adjustable voltage power supplies ability to be used as manual chargers. I was not happy with the traditional converter/automatic charger offerings. I wanted more precise manual control that could better mate with the batteries I choose to employ. I've never been a plug and play type of guy.
I only added the heatsinks over the areas right where the transistors meet the casing, and they certainly reduce the temperatures of the casing adjacent to them, significantly. I used Aluminum screen framing to raise the casing off my cabinet door about 3/8 inches, and to also act as strain relief for the 120vac input and DC output cables.
While without any additional fans or heatsinks the loud 40MM fan would cycle on and off at just 6 amps output, my 2 extra fans increased this to about the 24 amp level. With the heatsinks added this rose to ~34 amps, but ambient temperatures play a big factor.
Overall it is an impressive 40 amp charger and I have full confidence in its abilities.
Which is not to say I will not further increase heat dissipation abilities. It still gets hot when maxed out at 40 amps, but not nearly as hot as it did before increasing ventilation and heatsinking.
Thanks again for making us aware of these adjustable voltage power supplies ability to be used as manual chargers. I was not happy with the traditional converter/automatic charger offerings. I wanted more precise manual control that could better mate with the batteries I choose to employ. I've never been a plug and play type of guy.
