Uploaded October 2025 | Updated September 2026, 1 week ago

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00:00 Introduction
03:46 Test Run - Off Grid Mode
10:00 Test Run Results and Final Thoughts

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I put the EG4 FlexBoss 21 and GridBoss Combo to the test to see how it performs under load, real-world results when the system is pushed hard. The concept behind the FlexBoss and GridBoss combo is promising — a powerful, scalable energy management setup. But in testing, heat became a serious issue that affected reliability and sustained performance.

💬 Drop your questions below. We’re here for the truth, not the hype.

#SolArk15K #EG4Comparison #HybridInverter #Engineer775 #OffGrid #SolarBattle #SolarInverterReview #DIYsolar #eg4

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