power/weight/size is way better with LiFePO4 (thundersky/CALB) than lead. solar panel input is limited to about 20% or less eff of 1 kW/sq meter... so if you intend to run direct, minimizing rolling resistance/aero is key. weight is almost irrelevant once rolling.
I would strongly suggest adding the available pilot 200 watts from pedaling. if allowed by rules, as cost effective.
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