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Thrug t1_isdm47y wrote

Reply to comment by Diligent_Nature in Not at all a "Hands on" person but looking to change that, need help with battery math. by FUCKPUTIN2022LOL

Elec engineer here. Listen to this guy please. The risk something goes horribly wrong resulting in major damage, injury or death far outweighs the additional cost of an ots system.

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YourFavWardBitch t1_isdrar7 wrote

>The risk something goes horribly wrong resulting in major damage, injury or death far outweighs the additional cost of an ots system.

This, but also for any situation where one of those outcomes is at all likely.

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Gorbashsan t1_isdt3y1 wrote

As a tech I absolutely second Thrug here on encouraging you to follow the advice posted above, I have done plenty of DIY when it comes to solar and battery packs in series, I absolutely 100% never assume I have done it safely until I consult with an actual electrical engineer and buy one of them enough beer to inspect my plans on paper before hand, and give a look after, if I can't get him over, I 100% buy a pre-built. Listen to me on this, I have burned down a shed by forgetting to use a BMS. I mistakenly bought several batteries assuming they had internal ones but I had been off by 2 digits in their product codes when comparing to a catalogue and ordering them online and got the slightly cheaper ones without.

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FUCKPUTIN2022LOL OP t1_isealga wrote

I responded above and won't spam with big message but I appreciate the concern. It's more about the fact that realistically this shit over the counter is triple or quadruple marked up.

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Kraakefjes t1_ises0ig wrote

Burning up in a self made fire is much more affordable.

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qdtk t1_isezbhw wrote

Just take into consideration that it might not be “marked up” but instead you’re paying for additional circuits that provide safety features. Then consider those features non negotiable. You could build a motorized 4 wheeled vehicle cheaper than a car by just making it an engine with wheels. You could save on brakes, airbags, crumple zones, seatbelts, and all sorts of other things. But you shouldn’t. Just use solar panels, a properly sized inverter, a charge controller, and deep cycle marine batteries.

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Sluisifer t1_isgiuuc wrote

It's not.

You think it is because you don't understand a thing about what you're getting into. I'm not trying to be mean or whatever; that's the simple truth.

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