Still worth using lead-acid for backup in cold climates?

[Princess_Lora]

I’ve been looking into upgrading my home backup setup, and I keep going back and forth between sticking with lead-acid batteries or switching to lithium. I’m in Maine, so cold weather is a real concern like I’ve heard lithium systems can struggle if temps drop too low. For those of you up north, are lead-acid batteries still a practical choice these days? They’re cheaper and seem to handle the cold better, but the maintenance can be a pain. Curious what everyone’s running for winter backup power like is it worth keeping the old-school setup, or is it finally time to move on to lithium despite the cold?

 

[Boss_Nimzo]

Lead-acid still works fine if you’re not chasing efficiency charts. I ditched lithium after one winter where the BMS shut down mid-storm. AGM batteries just keep chugging along. As long as you keep them topped off, they’ll outlast most of the “smart” stuff when it’s cold.

 

[LordRobert]

I’m curious how cold your setup gets inside the battery space. If you’re keeping them in a garage or shed that drops below 20F, lead-acid’s safer, but if you can keep temps above freezing, lithium wins hands down for efficiency.

 

[blu3 li4m]

I’ve been looking into upgrading my home backup setup, and I keep going back and forth between sticking with lead-acid batteries or switching to lithium. I’m in Maine, so cold weather is a real concern like I’ve heard lithium systems can struggle if temps drop too low. For those of you up north, are lead-acid batteries still a practical choice these days? They’re cheaper and seem to handle the cold better, but the maintenance can be a pain. Curious what everyone’s running for winter backup power like is it worth keeping the old-school setup, or is it finally time to move on to lithium despite the cold?

In cold weather climates like Maine, LiFePO4 batteries, particularly models with built in heating systems, are a superior and more practical choice for home backup systems than lead acid batteries.
lead acid batteries are cheaper upfront and can operate in a wider range of sub zero temperatures without freezing but I'm not into it bcs if fully charged, they have significant performance and maintenance drawbacks and make them less practical for modern home backup use

 

[Alan]

If backup reliability is your main priority during a Maine winter, lead-acid still earns its place. Simple, predictable, works fine in the cold. Lithium is great too, as long as the pack has heating or at least stays above freezing. Do you cycle the batteries often or are they mostly just for outages? The answer changes which chemistry makes more sense.