
Solar Panels
Risen Energy RSM144-7-450M
Mono PERC big-format silver-frame panel. 450W, 20.7% efficiency, 12-year product warranty.
£96.88 per panel
How it scores
Scores based on published manufacturer specifications and weighted criteria — not lab testing. Methodology.
Specifications
- Cell type
- Mono PERC
- Watt peak
- 450
- Weight kg
- 24.4
- Dimensions mm
- 2094x1038x35
- Efficiency %
- 20.7
- Degradation % years
- 0.55
- Warranty product years
- 12
- Warranty performance years
- 25
- Temperature coefficient %
- -0.35
What I noticed
Risen Energy is a Chinese tier-1 manufacturer with global distribution. The RSM144-7-450M is their 144-cell Mono PERC panel in a 2094×1038mm format, delivering 450W at 20.7% module efficiency with a silver frame.
This is Mono PERC rather than current-generation N-Type, so peak efficiency is lower and degradation rate higher than the TOPCon and HJT panels in this comparison. The trade-off is established cell technology with a long track record.
Who it suits
Larger residential or light-commercial installs where the 144-cell big-format works for the roof, and where the budget constrains away from premium N-Type options. The silver frame integrates well with light-tile roofs.
What I'd watch for
This is the lowest-efficiency panel in the comparison — for tight residential roofs, the 22-23% TOPCon and HJT options will fit more total kW into the same area. At 24.4kg in a 2.1m frame, factor in lifting and roof structure considerations. The 12-year product warranty is standard for Mono PERC.
RSM144-7-450M head-to-heads
Side-by-side scoring vs each alternative in our shortlist.
Other Solar Panels on my shortlist
Read next
Background reading and decision-tree pages that put this product in context.
Stage 5: Panels and batteries explained
TOPCon vs PERC, efficiency, degradation — the specs that actually matter.
TOPCon vs PERC solar panels 2026
N-type vs P-type: real performance gap and whether the premium pays off.
Solar panel cost UK 2026
What a full installation actually costs in 2026 — and what drives the price.
How many solar panels do I need?
Sizing based on your roof, usage, and whether you want a battery.


