DIY Bootleg "EcoTech" Battery Backup

[SeeFu]

I'd like to use the same system as the opening post, but i need it to run 2 mp40's

 

[SeeFu]

... found answer

 

[SeeFu]

are you using a 15a or 20a fuse between the trickle charger and the battery? i would assume since my wall outlet is likely rated for 15a, i should use a 15a fuse

 

[bakbay]

I'd like to use the same system as the opening post, but i need it to run 2 mp40's

Interesting - curious why you'll need to run two MP40s? Assume you got a ginormous tank? I have two MP40s but only hooked up one wavemaker for battery backup. I believe one wavemaker is more than adequate to provide enough circulation for my 150g tank.

 

[SeeFu]

i dont ever have multiday power outages. at most i have a 4-5 hr outage. Since I dont need battery backup for a long period of time, I might as well just keep as much of the flow going.

 

[bakbay]

i dont ever have multiday power outages. at most i have a 4-5 hr outage. Since I dont need battery backup for a long period of time, I might as well just keep as much of the flow going.

True -- public utility has been somewhat robust in our area but we have witnessed scheduled maintenance that would last for 8+hrs before. That said, I had an incident recently where a bad Trident (water spilled on the device, more on that later) killed my whole Apex setup: all 3 WAV pumps & return pump were down -- so no flow while I was away for 7+ hours! Luckily my one MP40 was still running since it was not part of Apex's energy bar, just plugged into a wall on a separate circuit. Since then, I've put a battery backup to it for added insurance.

Lessons learned for me, adopting an old adage of "Hope for the best and prepare for the worst".