Fossibot F3600 vs ALLPOWERS R4000
High-capacity budget kings
Our Verdict
ALLPOWERS R4000 wins overall
Score 47 vs 42 —
better value at $0.63/Wh
| Spec | F3600 | R4000 |
|---|---|---|
| SunSee Score | 42 | 47★ |
| Capacity | 3,840 Wh★ | 3,168 Wh |
| AC Output | 3,600W | 3,600W |
| Surge Output | 7,200W | 7,200W |
| Solar Input | 2000W | 2400W★ |
| Weight | 40 kg | 36 kg★ |
| Cycle Life | 6,500★ | 3,500 |
| Charge Time | 1.5h | 1.5h |
| $/Wh | $0.49★ | $0.63 |
| Battery Type | LiFePO4 | LiFePO4 |
Choose Fossibot F3600 if:
- +6500 cycle life
- +3600W output
- +Excellent value
Choose ALLPOWERS R4000 if:
- +3600W output
- +Expandable to 12kWh
- +Fast solar
Not sure which size you need?
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Size My SystemAffiliate Disclosure: Links may earn a commission at no extra cost to you. Learn more. Specs from official product pages as of July 2026.