Which is better for an RV or van build?

The ECO-WORTHY fits Group 24 trays at 21.2 lbs and lets you watch charge from your phone. The Foursun gives 300Ah in one box, which means less wiring but more weight in one spot.

Foursun specifies over 4500 cycles. ECO-WORTHY does not publish a cycle figure, so the Foursun has the clearer longevity claim.

Is the Foursun worth the extra $167?

Yes if you need 300Ah and an IP67 case. If 100Ah is enough, the ECO-WORTHY costs less and adds Bluetooth the Foursun does not list.

Can I use either in cold weather?

Both have low-temperature charge protection. The ECO-WORTHY stops charging below -7℃ (19.4℉); Foursun lists low-temp BMS protection without a cut-off figure.

Which is better for a marine install?

The Foursun, because of its IP67 case. The ECO-WORTHY has no water or dust rating.

Can I parallel them to get more capacity?

The ECO-WORTHY supports 4S4P expansion up to 20.48kWh. Foursun does not list series or parallel limits, so check with the seller before wiring several together.

ECO-WORTHY 12V 100Ah LiFePO4 Battery vs Foursun 12V 300Ah LiFePO4 Battery

Buy the ECO-WORTHY if you want Bluetooth monitoring, a lighter battery and the lowest price: $219.99 at ECO-WORTHY as of November 5, 2026. Buy the Foursun if you need 300Ah in one unit and an IP67 case: $386.99 at Amazon as of November 5, 2026. Per amp-hour the Foursun is cheaper, about $1.29 versus $2.20, but it is a bigger, heavier battery with no app.

Today the ECO-WORTHY 12V 100Ah LiFePO4 Battery costs $167.00 less at its best price.

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