Some sources indicate that charging & discharging LiFeP04 batteries simultaneously may result in decreased battery lifespan. This is due to continuous switching between charge and discharge modes increasing heat in units and putting greater pressure on batteries.
There are obvious reasons why consuming power during charging is beneficial. Most importantly, having that flexibility enables 24-hour uninterrupted powering of appliances using a power station connected to solar panels that charge in the mid-day sun. But, it also enables power stations to work more efficiently. By drawing power from power stations during peak sun hours one can greatly increase power production. A 2000w storage capacity power station can, for example, deliver 4,000w or more during long, bright summer days if current is used as it is collected.
Thus the question becomes: “What is the longevity cost by simultaneously charging & discharging Bluetti power stations on a daily basis?” Bluetti’s LiFe04 batteries are specified to survive 3,500 recharges or about 10 years of daily use. If a Bluetti powerstation battery is charged & discharged simultaneously on a daily basis, how may years of use can be expected? Has Bluetti conducted testing on this and, if so, what did those tests indicate.
Simply put, everyone does this without issue. The way I look at it, “all things in moderation”. If you don’t “hammer” the discharge rate and charge rate and charge a little more than the discharge, it’s not cycling, therefore, longevity is at its maximum. BTW I did exactly that with my previous AGM batteries and got 10 years out of the last one I had, when others around me were getting less than 4 years.
Well, the only way to avoid it completely is to ONLY charge the system during the day and use the system power ONLY at night. Not too many people want to do that, and makes going offgrid impractical.
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When the batteries are topped off at 100% during the day, the system reduces the input from solar panels to just about what is being drawn, and I’ve seen the input go down to zero when the drain is very low.
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The batteries are not going to suddenly stop working one day. The storage capacity will gradually be reduced over time, and in 10 years there may be a better battery technology or maybe cheaper replacement batteries. So far, I’ll likely break even in costs in maybe 7 years, especially with energy prices increasing, and in the meantime I never have power blackouts like I keep seeing on my local Ring Channel. Losing power in the Summer in Vegas has to be torture.