Charlton Athletic enjoyed a successful first year back in the Championship under Nathan Jones, achieving promotion from League One 12 months ago through the play-offs. The Addicks finished 19th in the table, six points clear of the relegation zone and with multiple games spare. However, the season ended on a difficult note, with the team winning just one of their last nine league fixtures. Chris Woodward, a Charlton fan pundit, believes the club needs further investment to compete financially with bigger teams. Woodward told Football League World that he would like to see more money put into the club, but only if it's done sustainably. The current ownership group, Global Football Partners, has been intelligent in rebuilding the players and infrastructure while ensuring the club is run in a sustainable way. But Woodward claims Charlton doesn't generate enough income to compete with bigger sides at this level, and the new salary cap rules put them at a disadvantage. The summer transfer window offers the club a chance to invest in the squad again, and it remains to be seen what their plans will be for the months ahead. Jones will be keen to bolster the team and improve their chances of climbing back up the Championship. Charlton earned their place back in the Championship last year with victory in the play-offs and have been able to maintain their position in the division. The club's owners, Global Football Partners, have been willing to invest, but Woodward believes they need extra financial backing to compete with teams like Derby County, who have been linked with a change in ownership structure. Woodward thinks the owners can still put in an extra £33 million over three years, which could go a long way in improving the squad. However, he also warns that any new investment must be used sensibly and smartly to avoid harming the long-term future of the club. The Addicks have a busy summer ahead, and fans will be hoping for positive news on the transfer front. With the right investment and squad improvements, Charlton can aim to climb back up the Championship and compete with the top teams.